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TUCoPS :: Phreaking Technical System Info :: 1aessama.txt

1AESS Automatic Message Accounting





AT&T

                                                                AT&T PRACTICES
                                        AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

                                 1A ESS Switch
                         Automatic Message Accounting
                               Feature Document


Contents                        Page       B. AMA Data Groups             35

                                           C. Type Entry Code 63
------------------------------------          (Originating Exchange CI
                                              Overflow Record)            44
1. Overview                      1
                                           D. Type Entry Code 70 (SCF,
   Definition                    1            SCR, AR, DA, COT,
                                              SASCF, TSSCF, SLE I,
   General Information           1            and Name/Number Privacy
                                              Access Records)             45
------------------------------------
                                           E. Type Entry Code 73
2. Record Formats                2            (Customer Changeable
                                              Primary Inter-LATA
   Record Formats with Data                   Carrier)                    47
   Groups                        2
                                           F. Type Entry Code 76 (SCA,
   Unique Record Formats for                  CAR, and SLE II
   Features                      6            Records)                    48

   Statistical Record Formats    7         G. Type Entry Code Code 85
                                              (CSR Extension Number
------------------------------------          Change)                     49

3. Interactions                  8         H. Type Entry Code 86
                                              (Station Feature
------------------------------------          Assignment Change)          50

4. Abbreviations and                       I. Nine-Character Feature
   Acronyms                      15           Field for V86 and V88
                                              Records                     51
------------------------------------
                                           J. Sixteen-Character Feature
Tables                                        Field for V86 and V88
                                              Records                     54
    A. AMA Format Chart          20


                              AT&T - PROPRIETARY
               This document contains proprietary information of
               AT&T and is not to be disclosed or used except in
                     accordance with applicable agreements

                            Copyright (C) 1996 AT&T
                      Unpublished and Not for Publication
                              All Rights Reserved
                                Printed in USA

March 1996                                                                  i

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AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Contents                        Page       Y. VZ22-Message Service
                                              Counts                      71

    K. Type Entry Code 87                  Z. Format for CLID (VZ30),
       (Station Verification)    57           ICLID (VZ31), or PPV
                                              (VZ32) Counts               72
    L. Type Entry Code 88
       (Feature Verificaion)     58       AA. Format for CNAM Only
                                              (VZ33) Counts               73
    M. VZ08-800 Service
       Overflow Counts                    AB. Format for CNAM and
                                              ICLID Combined (VZ34)
    N. VZ12-Centrex/ESSX-1                    Counts                      74
       Intercom and 3-Port
       Facilities Counts         60       AC. Format for CWD (VZ35)
                                              Counts                      75
    O. VZ12-SMDR Format 1
       Data (No ETS Account               AD. Type Entry Code 67
       Code or WATS Reseller                  (Originating Exchange
       Authorization Code)       61           4-Digit CI Overflow         76

    P. VZ12-SMDR Format 1
       Data (ETS Account
       Code)                     62

    Q. VZ12-SMDR Format 1
       Data (WATS Reseller
       Authorization Code)       63

    R. VZ12-SMDR Format 2
       Data                      64

    S. VZ12-SMDR Format 3
       Data                      65

    T. VZ12-SMDR Format 4
       Data                      66

    U. VZ12-XMDR Format 5/6
       Data                      67

    V. VZ12-XMDR Format 5/6
       Data [WATS Reseller
       Authorization Code
       (IDDD)]                   68

    W. VZ12-XMDR Format 5/6
       Data [WATS Reseller
       Authorization Code
       (Non-IDDD)]               69

    X. VZ18-800 Service Busy
       Counts                    70


ii                                                                 March 1996

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AT&T Practices                         AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

1. Overview                            (b) Local Exchange Carrier (LEC):
------------------------------------       Orders should be processed through
Definition                                 your Technical Information Resource
------------------------------------       Management (TIRM) coordinator. If
                                           you are unsure who your TIRM
1.01 This document contains Automatic      coordinator is, call 800-432-6600
     Message Accounting (AMA) record
formats for single entry AMA records.  (c) Federal Government: These orders
                                           should be processed through:
1.02 This document is reissued to add
     information concerning the Sup-       AT&T
pressed Ringing Feature available in       P.O. Box 20046
the 1AE12.06 Periodic Partial Update       Greensboro, NC 27420
(PPU).                                        or
                                           Call 919-279-7424
1.03 This practice does not contain
     admonishments.                        All Others: Call 800-432-6600

1.04 AT&T welcomes your comments on     1.06 Every effort has been made to
     this practice. Your comments aid        ensure that the information in
us in improving the quality and use-    this practice is complete and accurate
fullness of AT&T documentation. Please  at the time of printing. However, in-
use the Feedback Form provided in this  formation is subject to change.
practice or call the AT&T Documenta-
tion Preparation Group at 708-224-7053  1.07 This practice is issued by:

1.05 Additional copies of this prac-    Document Preparation Group
     tice, associated appendixes, and   c/o M.W. Auter
all referenced practices may be or-     AT&T Network Software Center
dered from the AT&T Customer Informa-   2600 Warrenville Road
tion Center. One of the following       Lisle, IL 60532
methods should be used:
                                        1.08 Part 4 lists the abbreviations
(a) AT&T Employees: AT&T employees           and acronyms with applicable
    should mail Form IND 1-80.80,       terms used in this practice.
    available from the Customer
    Information Center, to:             General Information
                                        --------------------------------------
    AT&T Customer Information Center
    Attention: Order Entry Department   1.09 The AMA records, which contain
    2855 N. Franklin Road                    billing and statistical informa-
    P.O. Box 19901                      tion, are recorded on magnetic tape.
    Indianapolis, Indiana 46219-1999
                                        (a) Billing Information contains data
        or                                  necessary to generate revenue.
    Call 800-432-6600
                                        (b) Statistical information contains
    => NOTE:                                data that may be used to evaluate
       When ordering documentation          various services (for example, 800
       from the AT&T Customer               Services) and facilities (for
       Information Center, each AT&T        example, 3-port facilities).
       Business Unit/Division must be
       identified and all required      An AMA magnetic tape must be processed
       billing information must be      to obtain billing and statistical in-
       provided.                        formation. Usually, a Revenue Account-
                                        ing Office (RAD) processes AMA
                                        magnetic tapes.


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AT&T 231-390-063, Appendix 1, Issue 14
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1.10 The AMA data is recorded on tape        accounting center if erroneous
     in a Binary Coded Decimal (BCD)         data is detected.
format. One AMA character is repre-
sented by the values of four BCD bits.  YY = Used as a head check code
Each AMA character represents either
for the characters "V" through "Z", or  ZZ = Used as a dummy check code
a noncheck dummy (NCD) character.
Decimal digits represent numerical      13 = The end of an AMA tape file.
data. Alphabetic characters are used         These characters follow trailer
for AMA tape labels, data identifica-        and transfer labels.
tion, and data separation. The NCD is
a filler character that is used as      2. Record Formats
necessary to pad an AMA record. Each    --------------------------------------
AMA record is multiple of five tape     2.01 The two types of AMA records are
characters. The tape format and AMA          nonstatistical records and
characters are described in the         statistical records. They are as
parent document.                        follows:
                                        (a) Nonstatistical records provide
1.11 Predesignated AMA characters and       information primarily for billing
     character pairs are used for tape      purposes. The data for
labels, data identification, data se-       nonstatistical records are usually
paration, and various codes that are        provided by standard and optional
used to process and interpret AMA mag-      data groups. Each data group is
netic tape data. The header, trailer,       designed to provide specific AMA
transfer, and time change labels are        information for the majority of
described in the parent document. The       nonstatistical records. In certain
predesignated AMA characters are as         cases, either AMA data or uses of
follows:                                    a particular data group are unique
                                            to a particular feature. Data
VV = Header label                           group record formats and feature
                                            dependent formats for nonstatisti-
VX = Transfer label                         cal records are described
                                            separately in this part.
VY = Time change label
                                        (b) Statistical records primarily
VZ = AMA record as a statistical            provide statistical information
     record. These characters are           for telephone companies and/or
     followed by two digits, which          customers. They can also provide
     identify a particular type of          billing information for particular
     statistical record.                    services, (for example, message
                                            service). The format for each type
V  = Beginning of an AMA call record.       of statistical record is unique;
     This character is followed by two      therefore, no data groups are
     digits, which identify the type        applicable. Statistical record
     entry code for a particular call.      formats are described separately
                                            in this part.
Y  = Entry extender, which indicates
     that an AMA call record contains   Record Formats With Data Groups
     additional AMA data in one or      --------------------------------------
     more optional data groups.         2.02 Each record begins with the start
                                             of entry character "V", which is
ZY = Reserved for accounting center     immediately followed by a 2-digit type
     use as an error designation code   entry code. The 2-digit type entry
     This code can be inserted at the   code determines which standard and
                                        optional data groups are applicable to
                                        a particular call. Basic AMA
                                        information is recorded  in the
                                        standard data groups. Additional AMA
                                        information is recorded, if
                                        applicable, in one or more optional


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AT&T Practices                          AT&T 231-390-063, Appendix 1, Issue 14
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data groups. Each type entry code and   o SFV 36 or 37 - when a reactivation
the applicable data groups are listed     request times out
in Table A.                             o SFV 38 or 39 - when a reactivation
2.03 Each record contains an exact        request is deactivated
     multiple of five AMA characters.   2.08 If a customer has purchased
Since each tape character contains two       Enhanced INWATS (EITA) type AMA,
AMA characters (that is, A and B), the  service feature codes 00-99 are as-
beginning of a new record (that is,     signable by the telephone company for
character "V") can be recorded on tape  calls with type entry code 29 - ter-
as either AMA character A or B, de-     minating subscriber line usage studies
pending on the last character for the   [SLUS] or terminating INWATS. If spe-
previous record.                        cified, these telephone company as-
2.04 Usually, a single record is made   signable values are recorded in the
     for one call; however, multiple    feature field of data field A2 instead
records may occur. For example, mul-    of the fixed value of 08 (terminating
tiple records are made for a three-     INWATS) or 00 (terminating SLUS).
way call. A separate record is made     2.09 For old format for number ser-
for each leg of a three-way call.            vices (OFNS) in data group A2,
Multiple records may interspersed       the service feature contains the ser-
with other records on the AMA           vice feature identification received
magnetic tape.                          from the service control point (SCP).
2.05 The characterics, information,     2.10 For OFNS, type entry code 75, an
     and format of each AMA data             terminating access records that
group are listed in Table B. Informa-   have the charge number and/or calling
tion and entries for each data group    party number delivered for Network
that are not self-explanatory are de-   Interconnect (NI) Common Channel Sig-
scribed in the following paragraphs.    naling System 7 (CCS7) calls, type
2.06 In data group A2, the first two    entry code 66, data groups B2 and J
     characters provide basic infor-    contain the originating number and
mation pertaining to the AMA record     originating numbering plan area (NPA)
made for a particular call. If a call   If the complete originating telephone.
is traffic service observed, data       number is not available on a call, the
group Q, which contains the trunk       originating NPA is included in the re
network number (TNN), is appended to    cord and, if possible, an NXX is sup-
the record regardless of whether or     plied by the originating office. The
not the call is answered. For an un-    NCD characters are recorded as the
answered call, the release time is      last four digits of the originating
recorded in data group A3 - which       number if only the NPA and NXX codes
usually contains the connect time -     are known. If only the NPA is availa-
and NCD characters are recorded in      ble, the NCD characters are recorded
data group C - which usually contains   as the last seven digits of the
the disconnect time. Typically, traf-   originating number.
fic service observed calls are asso-    2.11 For OFNS, data groups D and N
ciated with type entry codes 17 and          contain the destination number
23; however, such calls that are un-    and destination overseas number ex-
answered are associated with type en-   pander. The existing data groups D and
try codes 16 and 22 since type entry    N are labled as "destination" rather
codes 17 and 23 do not include data     than "called." Destination field D and
group C.                                optionally destination field N are
2.07 The LDTF (LASS Dual Timer) fea-    filled  with the routing telephone
     ture allows a customer to retain   number received from the SCP. This
the current existing queue position     number may be the 10-digit NPA or
when an AR/AC reactivation request is   international direct distance dialing
made. A V70 AMA record will be gener-   (IDDD) number used to route the call,
ated using one of the following new     or it may be the service number that
SFVs (Service Feature Values):          the originator dialed.
o SFV 32 or 33 - when a call completes  2.12 Data group G contains the message
  after delayed processing following a       billing index (MB) for message
  reactivation request                  rate calls with type entry codes 16,
o SFV 34 or 35 - when a AR/AC customer  17, 18, 22, and 23. For message rate
  is busy after ringback following a    calls without a MBI (for example,
  reactivation request                  type entry code 15), the number of


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AT&T 231-390-063, Appendix 1, Issue 14
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message units can be calculculated      a 3-character field that contains the
using the originating and terminating   RAO number of the buyer. If the RAO
office codes and the call duration.     number is not available, the field is
Data group G contains the OUTWATS       filled with NCD characters.
calls with type entry code 25.          2.17 For OFNS in data group I30, the
2.13 Data group I3 contains up to 24         originating LATA is a 3-character
     dialed digits for calls with       field that contains the LATA of the
type entry codes 01 and 27. When 24     originator of the call.
digits do not exist, the digits are     2.18 For OFNS in data group I31, call
left adjusted and the remaining digit        type (a new standard format item)
positions are filled with NCDs. For     is a 3-character field that contains
calls with type entry code 91, any de-  the call code. The call code is
tected multifrequency digits are en-    assigned by the telephone company at
tered in positions 1 through 14. Un-    the SCP.
used positions 1 through 14 are filled  2.19 For OFNS in data group I32, the
with NCDs. Positions 15 through 23 al-       structure code, a new standard
ways contain NCDs. Positon 24 contains  format item, is a 4-character field
an electronic toll fraud (ETF) termi-   that contains the structure code only,
nation code.                            not the digit extender digit. The
2.14 Data group 14 contains simulated   structure code is assigned by the
     facilities usage information for   telephone company at the service
wide area telecommunications service    switching point (SSP), and currently
(WATS) calls as follows:                will be 0360 to 0369.
(a) For OUTWATS calls, type entry       2.20 Data groups I33 through I40 are
    codes 11 and 25, the first char-         only valid with the V76 record
    acter indicates either full busi-   (SCA, CAR, and SLE II). Data group I33
    day or measured time service. The   contains the Feature Status Option II,
    remaining four characters contain   Data group I34 contains the Screen
    either the 4-digit pseudo trunk     List Size for SCA, Data group I35 con-
    number (TN), zeroes if the pseudo   tains the Screen List Size for CAR,
    TN is unavailable, or NCDs if ded-  and Data groups I36 through I40 are
    dicated physical trunks are used.   reserved for future use. See Table F
(b) For 800 Service calls, type entry   for more information.
    code 29, the first character is a   2.21 Data group J contains the NPA
    NCD. The remaining four characters       digits associated with an origi-
    contain the Simulated Facilities    nating station. Data group J is neces-
    Identification Number when the      sary for a centralized automatic mes-
    WATS Administrative Feature ap-     sage accounting (CAMA) office which
    plies, the Multi-Line Hunt Group    handles traffic from two or more NPAs.
    Terminating Number if the termin-   The inclusion or ommision of data
    ating number is in a Multi-Line     group J is office dependent; however,
    Hunt Group, or NCDs if the call is  if data group J is included for an
    a line to line call and the Inward  office, it is applicable to all AMA
    Wide Area Telecommunications Ser-   call records. The use of data group J
    vice (INWATS) AMA Recording En-     is indicated in AMA tape header,
    hancement is not active. When IWAR  trailer, transfer, and time change
    is active, the remaining four       labels by the format by the format
    characters will contain the last    modifier.
    four digits of the terminating DN   2.22 For OFNS and for NI CCS7 calls
    for line-to-line calls.                  (V66), data group J is always
2.15 For OFNS in data group I28, the    included in the record. The office
     dialed number is a 10-character    option for data group J does not
field that contains the telephone num-  affect the V75 or V66 record.
ber dialed by the originator of the     2.23 Data group L indicates whether or
call. The telephone number can be 7 or       not optional data groups are ap-
10 digits. For a 7-digit number, the    pended for a particular type entry
dialed number field is filled with NCD  code. If optional data groups are ap-
characters where the NPA would          plicable, data group L contains the
normally be.                            entry extender character "Y."
2.16 For OFNS in data group I29, the    2.24 Data group M indicates the pre-
     number service customer's RAO is       sence of data groups N,P,Q,S or T.


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AT&T Practice                           AT&T 231-390-063, Appendix 1, Issue 14
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2.25 Data group N is a 2-digit number   the carrier; the TGN field contains
     expander used for all overseas     this TGN.
calls. Up to 12 digits can be recorded  A "3" indicates that an indirect call
using both data group D and N. If the   was made to the carrier where both the
dialed number contains less than 12     trunk between the EAEO and the AT as
digits, any unused digit position is    well as the trunk between the AT and
filled with a NCD. If the dialed num-   the carrier are CCS7. In this case,
ber contains more than 12 digits, the   the TGN field contains the TGN of the
additional digits are recorded in op-   trunk used between the AT and the
tional data group W10000.               carrier.
2.26 Data group P indicates the pre-    A "4" indicates that an indirect call
     sences of 1 or more data group U   was made where the EASO to the AT
fields.                                 trunk was CCS7 and the AT to the car-
2.27 Data group Q contains the trunk    rier trunk was non-CCS7. In this case,
     network number (TNN) used for a    the TGN field contains the TGN used
call completed via an outgoing trunk    between the EAEO and the AT.
when this AMA data function is re-      2.32 The "terminating routing indica-
quested via the AMA-ACT input message.       tor" field identifies the type of
The TNN is recorded for each call (via  connection used when a call arrives
an outgoing trunk) that requires an     from a carrier. Unlike the "originat-
AMA record. No option is available for  ing routing indicator" field, it has
TNN recording on selected trunk group   no effect on the TGN field which al-
basis. The TNN recording function is    ways contains the TGN of the trunk
stopped by entering the AMA-OFF input   from the carrier.
message.                                2.33 Data group U2 contains a customer
2.28 Data group S indicates the pre-         accounting code for any call to
     sence of 1 or more data group W    which the the Customer Dialed Account
fields.                                 Recording(CDAR) feature is applicable.
2.29 Data group T contains data for     2.34 Data group U4 contains the on-
     any call that uses an inter-LATA        hook time of the short supervi-
carrier (IC) or international carrier   sory transition (SST) signal for sig-
(INC). Data group T is applicable to    naling irregularities (SIG) when the
such calls with type entry codes        ETF investigation terminates due to
01, 11, 25, 48, 64, 66, 79.             abandon, toll security multifrequency
2.30 When the Carrier Identifier Code   (MF) receiver timeout, or a subsequent
     (CIC) is 3 digits, Data Group T    SST report. Data group U4 is
will hold the CIC and Operator Data     applicable to type entry code 91.
digits. When the CIC is 4 digits, Data  2.35 Data group U10 contains SIGI sta-
Group U20000 will hold the CIC (see          tus information associated with
paragraph 2.39). When the CIC value is  ETF investigation and long duration
invalid, the Carrier Identifier Field   call recording (LDCR) status informa-
will contain all NCDs and the Operator  tion for an AMA record of a long
Data field will be set to a value of 9. duration call.
2.31 The originating routing indicator  2.36 Data group U40 contains a 4-digit
     identifies the type of connection  customer identification number for any
the equal access end office (EAEO) has  call that requires customer
to the carrier and also identifies      identification.
which trunk group number (TGN) is       2.37 Data group U100 is applicable to
contained in the "TGN" field.                any call that does not have a
A value of "0" indicates that the EAEO  minimum recordable duration and re-
is directly connected to the carrier    quires an AMA record. Any such call is
via a non-CCS7 trunk and the TGN field  nonchargable as indicated by the first
contains this TGN.                      information digit in data group A2
A "1" indicates that an indirect trunk  with a value of either 4, 5, 6, or 7.
was used to the carrier and non-CCS7    Data group U100 contains the decimal
signaling was used between the EAEO     value 2 which indentifies the record
and access tandem (AT). In this case,   for a call without a minimum record-
the TGN field contains the TGN used     able duration. The AMA record for such
between the EAEO and AT.                a call contains other data groups that
A "2" indicates that a direct CCS7      are applicable to the type entry code
trunk was used between the EAEO and     for that call.


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AT&T 231-390-063, Appendix 1, Issue 14
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2.38 Data Group U10000 is used in con-  for non-existant digits. The first 12
     junction with the RCAMA (Return    digits continue to be recorded in Data
Call AMA) feature. When an AMA record   Groups D and N.
is generated from an AR/AC attempt, a
value of 2 or 3 within this data group  Unique Record Formats for Features
will indicate the status fo the DN      --------------------------------------
(public or private) sent to the AR/AC   2.44 Each unique record begins with
subscriber. A value of 2 in Data Group       the start of entry character "V",
U10000 will indicate that the call in-  which is immediately followed by a 2-
itiated via the AR/AC capability was    digit type entry code. The 2-digit
sent to the AR/AC subscriber public;    type entry code identifies the record
whereas, a value of 3 will indicate     for a particular feature or applica-
that the call initiated via the AR/AC   tion. The unique record formats for
capability was sent to the AR/AC sub-   features are as follows:
scriber private.
2.39 When the carrier identifier Code   (a) The Carrier Interconnect (CI) fea-
     (CIC) is 4 digits (the leading         ture uses a type entry code 63 for
digit is not zero), Data Group U20000       the originating exchange overflow
will contain the CIC. Data Group T          count. The originating exchange
will also be appended to display the        overflow record format and data
Operator Data digit but the Carrier         are listed in Table C.
Identifier field of U20000 of Data
Group T will contain NCDs. The Car-         Beginning with 1AE12.00 and later
rier Identifier field of U20000 is 4        generics, the V63 record will be
characters in length. U20000 is not         replaced with the V67 record. The
used when an invalid CIC is recorded.       only difference between the V63
2.40 For OFNS in data group W400, the       record layout and the V67 record
     alternate billing number is an         layout is the CIC field will be
optional 10-character field that con-       4 characters in V67. Regardless of
tains the 10-digit billing number re-       the size of the CIC being stored
ceived from the SCP.                        (3 digits versus 4 digits), Over-
2.41 Data Group W2000 is appended when      flow IC record V67 will always be
     the processed record is for Ad-        used. See Table AC for the layout
vanced Services Platform/Service            V67.
Switching Point (ASP/SSP) specified     (b) The Local Area Signaling Services
billing. W2000 will contain the 3 digit     (LASS) is a family of features
Call Code that has been passed by the       that uses type entry code 70 and
Service Control Point (SCP). The length     76. Entry code 70 (Table D) refers
of W2000 is 3 characters.                   to the usage-sensitive record out-
2.42 Data Group W4000 is applicable to      put from an activation or deacti-
     calls extended by an IP or for         vation of a LASS feature. Entry
any call to which an ASI-Proxy sub-         code 76 is made on daily basis for
scriber has dialed an IP Explicit Ac-       all lines that have a LASS feature
cess code. Data Group W4000 will con-       active overnight.
tain the Service Code (up to 5 charac-  (c) The Customer Changeable Primary
ters) and Subscriber ID (up to 10           Inter-LATA Carrier (CCPIC) feature
characters) sent to the IP. For calls       uses a type entry code 73. The
extended by an IP, the Data Group           CCPIC record format and data are
W4000 also indicates the "Access Me-        listed in Table E.
thod" used by the customer (1 charac-   (d) The OFNS feature uses type entry
ter) and Conversion Indicator (1 char-      code 75. This record provides SSP
acter). The length of W4000 is 17           number service billing data for IC
characters.                                 calls and non-IC calls.
2.43 Data Group W10000 is used only on  (e) Entry code 76 (Table F) is made on
     overseas calls with more than 12       a daily basis for all lines that
dialed digits. The length of W10000 is      have a LASS feature active over-
4 characters. The first character con-      night.
tains the length of the Country Code    (f) The centrex station rearrangement
and the last three characters contain       (CSR) feature uses four type entry
digits 13-15. An NCD character is used      codes as follows:


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AT&T Practices                          AT&T 231-390-063, Appendix 1, Issue 14
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(1) A CSR extension number change uses  Statistical Record Formats
    a type entry code 85. The CSR ex-   --------------------------------------
    tension number change record for-   2.45 Each statistical record begins
    mat and data are listed in Table    with the characters "VZ", which are
    G.                                  immediately followed by a 2-digit
(2) A CSR station feature assignment    code. The 2-digit code identifies a
    change uses a type entry code 86.   particular statistical record. The
    The station feature assignment      statistical records are as follow:
    change record format and data are
    listed in Table H. In the 1AE7      (a) Overflow counts of 800 Service
    generic program, only one "fea-         nonhunting simulated facilities
    tures changed" field, containing        groups (SFGs) are recorded daily.
    nine AMA characters, is required.       An 800 Service statistical record
    The values for this 9-character         (VZ08) contains overflow counts
    field are listed in Table I. In         for up to five customer groups.
    1AE8A and later generic programs,       The VZ08 record format and data
    a second "features changed"             are listed in Table M.
    field, containing 16 AMA charac-    (b) Counts for Centrex/ESSX-1 customer
    ters, is required. The values for       intercom and 3-port facilities can
    the 16-character field are listed       be activated and deactivated on a
    in Table J.                             per-customer group basis. The
(3) A CSR station verification uses a       counts are recorded in a VZ12
    type entry code 87. The station         statistical record as listed in
    verification record format and          Table N. Counts that are not ap-
    data are listed in Table K.             plicable are filled with NCDs. The
(4) A CSR station feature verification      NPA digits for the listed direct-
    uses a type entry code 88. The          ory number (LDN) are filled with
    station feature verification re-        NCDs. Refer to paragraph 3.14.(f)
    cord format and data are listed         for Table O through Table W.
    in Table L. In the 1AE7 generic     (c) A record is made of 800 Service
    program, only one "features             data base busy counts and termin-
    searched for" field, containing         ating end office busy counts for
    16 AMA characters, is required.         all SFGs with the Busy/Idle Status
    The values for the 16-character         Indicator (BISI) feature. The BISI
    field are listed in Table J.            feature uses the common channel
                                            interoffice signaling (CCIS) data
(g) The Caller ID Call Wait (CIDCW)         base, which maintains the busy/
    feature does not affect the layout      idle status of SFGs. These busy
    of the three existing ICLID/CNAM        counts are recorded in a VZ18
    records. However, when the CIDCW        statistical record as listed in
    Fast Feature bit is set, the count      Table X.
    values will contain the accumulat-  (d) Usage counts for message service
    ed totals for both on-hook and          (MS) customers are recorded daily,
    off-hook deliveries.                    for each MS customer, in a VZ22
                                            record. The record format contains
                                            usage counts for up to three MS
                                            customers as listed in Table Y.
                                        (e) The LASS feature incudes the Bulk
                                            Calling Line Identification
                                            (BCLID) and Individual Calling
                                            Line Identification (ICLID) fea-
                                            tures. The BCLID and ICLID fea-
                                            tures provide customers with in-
                                            formation regarding each incoming
                                            call. The BCLID feature requires
                                            an hourly AMA record. The ICLID
                                            feature requires a daily AMA re-
                                            cord. Both records contain the
                                            total count of calling DNs sent
                                            to the customer and the total
                                            count of unavailable/private


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    DNs indicated as such to the cust-      The record formats and data lay-
    omer. The BCLID counts are gener-       outs for VZ33 and VZ34 are listed
    ated hourly and are accumulated         in Tables AA and BB respectively.
    daily. The record format and data       For more information on the CNAM
    for BCLID (VZ30) and ICLID (VZ31)       feature, refer to AT&T 231-390-244
    are identical except for the rec-   (h) The Call Waiting Deluxe (CWD) fea-
    cord identifier characters "30"         ture provides one additional LASS
    and "31". The record format and         statistical AMA record type. A
    data for both BCLID and ICLID are       VZ35 record is created when the
    listed in Table Z. For information      CWD subscriber has CWD usage
    on BCLID refer to AT&T 231-390-243.     sensitive conference and either of
(f) Usage counts for Pay Per View (PPV)     the following events occur:
    customers are recorded daily for        o There is no room to store the
    each PPV customer in a VZ32 record.       line equipment number (LEN) and
    The record format contains usage          the corresponding count in the
    counts for up to 3 PPV customers as       Call Waiting Deluxe Usage
    listed in Table Z. For more infor-        Sensitive Conference Count
    mation on PPV, refer to                   (CWUSCC) Table.
    AT&T 231-390-386.                       o The time is 12:45 A.M. Records
(g) The Calling Name Delivery (CNAM)          are generated for all LENs
    feature provides two additional           having an entry in the CWDUSCC
    LASS statistical daily AMA record         Table.
    types. A VZ33 record is created         The record formats and data lay-
    when the customer has only usage        outs for VZ35 are listed in Table
    sensitive CNAM capabilities and         AC. For more information on the
    one of three events occurs:             CWD Feature, refer to
                                            AT&T 231-390-082.
    o One of the three counts values
      overflows the maximum value of        3. Interactions
      255.                                  ----------------------------------
                                            3.01 The AMA feature interacts
    o The CNAM capability is removed             with numerous other features
      from the line or usage sensi-         which normally require new or
      tive ICLID is added to the line.      changed parameters and/or transla-
                                            tions to implement. The AMA-re-
    o The Time is 12:45 A.M. (Records       lated features are discussed in
      created after processing of           the following paragraphs.
      BCLID and ICLID records has           3.02 The Busy/Idly Status Indica-
      completed.)                                tor (BISI) feature provides
                                            800 Service customers with an in-
    A VZ34 record is created when the       dication of the effectiveness of
    customer has both CNAM and ICLID        their 800 Service. The BISI is
    usage sensitive capabilities and        part of the CCIS INWATS feature
    one of three events occurs:             which utilizes a data base to
                                            maintain the busy/idle status of
    o One of the four count values          SFGs. The data base allows calls
       overflows the maximum value of       to be completed, rerouted, or
       63.                                  blocked more efficiently before
                                            reaching the terminating end of-
    o Either the CNAM capability or         fice. The 800 Service busy counts
      the ICLID capability is removed       are listed in Table X. For a
      from the line.                        detailed description of BISI, re-
                                            fer to AT&T 231-090-276. For a de-
    o The time is 12:45 A.M. (Records       tailed description of CCIS, refer
      are created after processing of       to AT&T 231-090-416.
      BCLID and ICLID records has           3.03 The Call Forwarding Usage
      completed.)                                Sensitive (CFUS) feature
                                            provides the telephone company
    The VZ31 record is still created        the option of offering call
    for customers having only usage         forwarding service to individual
    sensitive ICLID capabilities.           line customers; thus, all indivi-
                                            dual lines, other than


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AT&T Practices                          AT&T 231-390-063, Appendix 1, Issue 14
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Centrex/ESSX-1, without the call for-   number in no way affects the charging
warding option would have access to     of the call, but rather is used by the
call forwarding service. When these     customer in cost allocations of the
lines use the service, a usage AMA re-  customer's AMA billed services. For a
cord will be generated. For a detailed  detailed description of CDAR, refer to
description of CFUP, refer to           AT&T 231-090-291.
AT&T 231-090-292.                       3.08 The Customer Automatic Identifi-
3.04 Effective with the 1AE8A generic        cation (CSAID) feature provides
     program, the optional CI feature   a means for customer identification to
allows the telephone customer to ac-    be included in AMA records for CCSA,
cess particular carriers for trans-     WATS, and any CDAR calls. Data Group
mission of toll calls. Calls crossing   U40 (Table B) is appended to the AMA
a local access and transport area       record when CSAID is used. The CSAID
(LATA) boundary are inter-LATA calls    feature is discussed in
and are routed to an IC. Internation-   AT&T 231-090-273.
al calls are routed to an INC. Per      3.09 The Directory Assistance Charg-
call AMA records are generated for           ing (DAMA) feature provides bulk
all IC or INC calls originating from    billing of calls to directory assis-
or terminating to an exchange. These    tance using AMA type entry 30 (Table
records are used to bill access         A). With DAMA, all charged calls to
charges to the carrier for use of the   411 are billed as entry type 30. Calls
local exchange. For a detailed de-      to 555-1212 may also be billed as type
scription of the CI feature, refer to   entry 30. The type entry 30 bulk bill
AT&T 231-090-120.                       includes the same information as an
3.05 The Centrex Station Rearrange-     untimed message rate bill; basically,
     ments (CSR) feature allows CSR     the calling number and answer time are
customers to make certain changes for   included. The AMA records are made
their extensions and features and to    only for completed directory assis-
verify those changes. A record of each  tance calls. No abandons are recorded.
successful customer change and/or ver-  Refer to AT&T 231-090-344.
ification is recorded on AMA tape.      3.10 The Electronic Tandem Switching
Customers are billed for the CSR fea-        (ETS) feature provides a group of
ture by either a flat rate or on a us-  Centrex/ESSX-1 features for improved
age-sensitive basis. For a detailed     tandem tie-trunk services in 1AE6 and
description of CSR, refer to            later generic programs. The Station
AT&T 231-390-064. The CSR feature uses  Message Detail Recording (SMDR)
four type entry codes given in          feature is available with ETS. For a
paragraph 2.42(f).                      description of ETS and SMDR, refer to
3.06 The Charge Delay Timing Reduc-     AT&T 231-090-154 and AT&T 231-090-166,
     tion (CHDR) feature reduces the    respectively.
charge delay timing on coin and cer-    3.11 The Flexible Route Selection
tain other calls from 2 to 4 seconds         (FRS) feature is optionally
to 600 to 800 ms. This feature also     available for Centrex/ESSX-1 customers
prevents call charging when either of   to automatically direct outgoing sta-
the following conditions exists:        tion calls to the customer and to
(a) A switching system transient        automatically direct outgoing station
    appears to the system as the        calls to the customer's most preferred
    called party going off-hook.        available route. The foreign exchange
(b) The calling party goes on-hook      (FX) routes may be accessed by the FRS
    just as the called party goes       feature. Under certain conditions, tie
    off-hook.                           lines used for off-network dialing may
Without this feature, either of these   be included as a possible route. For a
conditions could initiate call charg-   description of FRS, refer to
ing. Additionally, this feature pro-    AT&T 231-090-142.
vides charge delay timing on all out-   3.12 Full ESSX-1 service provides
going calls.                                 customer facility groups (CFGs)
3.07 The Customer Dialed Account Re-    which have the capability to limit
     cording (CDAR) feature permits a   network access calls, intercommunica-
Centrex/ESSX-1 customer to add an ac-   tion calls, and 3-port facility usage
count number to the AMA record for any  for Centrex/ESSX-1 customers. Refer to
call. The account number appears in     AT&T 231-090-145.
the AMA record for its associated call  3.13 The identified Outward Dialing
call and subsequently in the                 feature provides the means
customer's telephone bill. The account  for identifying the originating
                                        number on the AMA tape on calls

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AT&T 231-390-063, Appendix 1, Issue 14
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involving timed or message unit charg-      individual station identification.
es. The number may be inserted in the       In addition, modification of entry
AMA message manually by an operator or      types V01 and V09 were made to
automatically by the switching system.      provide call detail on the AMA
This feature provides the telephone         tape for calls placed via the ETS
number from which each call was origi-      dialing plan and routed over FX
nated. Refer to AT&T 231-090-147.           trunks, Centrex/ESSX-1 tie trunks,
3.14 The Message Detail Recording-          ETS access trunks, ETS intertandem
     Revenue Accounting Office (MDR-        trunks, and CCSA network access
RAO) feature has been enhanced to pro-      trunks. The modified V09 entry
vide two modified AMA tape entries for      type is used for calls using CCSA
calls routed by the ETS dialing plan        network access trunks. The modi-
to FX trunks, Centrex/ESSX-1 tie            fied V01 entry type is used for
trunks, ETS intertandem trunks, and/or      all other call routing for which
common channel switching arrangement        no other normal billing record
(CCSA) network access trunks.               would be made. These AMA records
(a) The Station Message Detail Record-      are for the use of the customer
    ing via the Revenue Accounting Of-      and are nonbillable. The differ-
    fice (SMDR-RAO) feature, prior to       ence between the standard V01 and
    the 1AE6 generic programs, provid-      V09 formats and the modified V01
    ed station identified call detail       and V09 formats is in data group
    for most calls placed by a Cen-         A2 (Table B). In the modified V01
    trex/ESSX-1 customer. Intra-Cen-        and V09 formats, the A2 informa-
    trex/ESSX-1 call were not included,     tion digits equal 40, indicating
    but call detail, including station      sampled nonbillable calls, and the
    identification, could be provided       A2 service feature code equals 19,
    by the AMA tape for calls routed        indicating an MDR-RAO record.
    via WATS, CCSA, FX, tie lines, and  (d) The ETS Billing improvements (En-
    DDD facilites.                          hancements) feature [also known as
(b) The SMDR to the Customer Premises       wide area telecommunications ser-
    feature was introduced in the 1AE6      vice (WATS) reseller], available
    generic program to provide for call     in the 1AE7 generic program, pro-
    detail to be sent directly to the       vides enhancements to the ETS
    customer premises via a peripheral      feature as follows:
    unit controller (PUC) data link
    channel. This provided call detail,     (1) Allows remote access to ETS
    without RAO processing, for calls           lines.
    placed using the ETS dialing plan.      (2) Increases the number of
    However, details for calls placed           authorization codes per ETS
    through other access (9+, 1XX,              customer to 10,000,000.
    etc.) were not available. Also, use     (3) Provides the capability of
    of SMDR-Premises resulted in the            station message detail records
    loss of station identified billing          (SMDR) and extended message
    on the AMA tape for billable calls          detail records (XMDR) on the
    made using the ETS dialing plan.            AMA tape or the attached
(c) Both SMDR-Premises and SMDR-RAO             processor system (APS).
    were improved in the 1AE7 generic
    programs. The improvements in       (e) The primary objective of the
    SMDR-Premises result in individual      ETS Billing Enhancements feature
    station identification on the AMA       (AT&T 231-090-135) is to provide
    tape for calls placed via facili-       remote access to business owned
    ties for which a billing record is      ETS lines. Any public or private
    normally made (for example, DDD,        touch-tone telephone may be
    WATS). The modification is              used to gain access to an ETS
    essentially transparent to the RAO      line.  An ETS line is accessed
    since the entry type remains            by dialing the directory of
    unchanged. The bulk-billing number      that ETS line.  Once the ETS line
    is simply replaced by the indivi-       is accessed, it may be used to
    dual station number. The SMDR-RAO
    improvements also result in


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AT&T Practices                          AT&T 231-390-063, Appendix 1, Issue 14
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    place any valid call over the       links, both SMDR and XMDR are option-
    private ETS network or the public   ally recorded on the AMA tape or APS.
    network. Calls placed from ETS      For ETS customers with recording
    lines accessed from remote loca-    equipment and data links, both SMDR
    tions may be routed via the Auto-   and XMDR are optionally recorded on
    matic Route Selection-Deluxe and    the AMA tape or APS only when the
    ETS Deluxe Queuing features and     customer's recording equipment, data
    recorded via the Station Message    link, or both malfunction. This pro-
    Detail Recording feature. The re-   vides a backup for the customer pre-
    mote access to ETS lines capabil-   mises located recording equipment.
    ity is expected to be used pri-     Whenever the data link and the cust-
    marily for placing WATS calls       omer premises equipment are in ser-
    from the local telephone.           vice, SMDR and XMDR are transmitted by
                                        the 1A ESS switch over the data link
(f) The ETS Billing Enhancements fea-   to the customer premises recording
    ture provides a capability of re-   equipment. The ETS Billing Enhance-
    cording both SMDR and XMDR on the   ments MDR via RAO feature is optional
    local 1A ESS Switch AMA tape or     on a per ETS customer basis and is
    APS. The SMDR and XMDR formats      available to all ETS customers.
    provided in the following tables:
                                        (a) The ETS Billing Enhancement Auth-
Table O - VZ12 SMDR Format 1 Data           orization Code Recording for the
          (No ETS Account Code or           EEDP (ETSACRE) feature (AT&T 231-
          Authorization Code)               390-383) extends the WATS Reseller
                                            feature to EEDP customers. The
Table P - VZ12 SMDR Format 1 Data           ETSACRE feature produces VZ12 or
          (ETS Account Code)                Structure Code 09004 AMA records
                                            for EEDP class 1 and class 2 calls
Table Q - VZ12 SMDR Format 1 Data           which are available in 1AE8A.11
          (WATA Reseller                    and 1AE9.06 and later generic
          Authorization Code)               programs.

Table R - VZ12 SMDR Format 2 Data       3.17  The message Detail Recording on
                                              Tie Trunks (TAMA) feature pro-
Table S - VZ12 SMDR Format 3 Data       vides an AMA record of tie trunk or FX
                                        trunk call originations on a per ac-
Table T - VZ12 SMDR Format 4 Data       cess code basis. The AMA record con-
                                        tains the calling number, called num-
Table U - VZ12 XMDR Format 5/6 Data     ber (1 to 24 digits), connect and dis-
                                        connect times, and other information.
Table V - VZ12 XMDR Format 5/6 Data     Refer to AT&T 231-090-417 for
          [WATS Reseller                additional information.
          Authorization Code (Non-
          IDDD)]                        3.18  The Type 27 AMA Modification
                                              feature is an optional feature
Table W - VZ12 XMDR Format 5/6 Data     available for use in conjunction with
          [WATS Reseller                the TAMA feature. It is initially
          Authorization Code (IDDD)].   available for the 1AE8A generic pro-
                                        gram in PPU (Periodic Partial Update)
3.15 When the RAO processes the VZ12    8A.09. For the 1AE9 generic program,
     or structure code 09004 AMA re-    it is available in PPU 9.04 and later
cords, the RAO separates SMDR and       generic programs.
XMDR from the billing records and
then forwards the SMDR and the XMDR     3.19 Feature group 9STAMA is required
to the ETS customer. This capability         for the TAMA feature and must be
is called ETS Billing Enhancement MDR   loaded to implement the Type 27 AMA
via RAO feature and can be used either  Modification feature. The Type 27 AMA
as a stand-alone feature or as a        Modification feature is a fast feature
backup to the data link and the         controlled by set card FF031. If the
customer premises recording equipment   value of set card FF031 equals one,
                                        the feature is turned on. If the value
3.16  For ETS customers withou re-      is equals zero, the feature is not
      cording equipment and data        turned on.


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AT&T 231-390-063 Appendix 1, Issue 14
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3.20  Without the optional Type 27 AMA  base determines if an 800 Service call
      Modification feature, the TAMA    can be completed to an idle terminat-
feature generates type entry code 27    ing end office or if the call will be
AMA records for tie trunk and FX trunk  blocked due to a busy condition. The
call originations on a per-access code  V10 type entry code is available in
basis only.                             1AE7 and later generic programs for
                                        AMA records (for use in point to point
3.21  The Type 27 AMA Modification      studies) of 800 Service calls utiliz-
      feature provides three new ser-   ing the OSO feature. The 800 Service
vice feature codes (i.e., 85, 86, and   calls utilizing the OSO feature will
87) for Data Group A2, which is for-    continue to have the standard toll
matted as part of a type entry code 27  record (type entry code 01) made.
AMA record. Service feature codes 85,   These toll records are determined to
86, and 87 indicate 5-digit, 6-digit,   be nonbillable by the RAO by recogniz-
and 7-digit tie trunk and/or FX trunk   ing the digits 800 in data group D.
call originations, respectively. The    Refer to table A and Table B.
number of digits dialed includes the
dialed access code.                     Data group A3 contains either an NCD
                                        or "9" (indicating subscriber line us-
3.22  These service feature codes       age study) and the connect time. Data
      provide telephone company         group D contains the actual 800 Ser-
screening capabilities that facilitate  vice number dialed. Data group I8 con-
the collection of AMA entries for ser-  tains terminating data. For a descrip-
vice area wide call originations via    tion of the 800 Service feature, refer
tie trunks and/or FX trunks. When       to AT&T 231-090-274.
these types of call originations are
identified as either 5-, 6-, or 7-      3.26  The Signaling Irregularities
digit calls, the appropriate service          (SIGI) feature provides the cap-
feature code is recorded in Data Group  ablity to detect, identify the source
A2 of the type entry code 27 AMA re-    of, and report illegal MF signaling on
cords generated for such calls. For     toll calls due to electronic toll
any other type of tie trunk or FX       fraud. Signaling Irregularities uses a
trunk call origination, service fea-    type entry 91 for AMA records. Refer
ture code 00 will continue to be re-    to Table A and Table B for the data
corded in Data Group A2 as is cur-      groups applicable to SIGI.
rently done.
                                        3.27  The Source Billing of Attendant-
3.23  In order to process type entry          Handled Calls (SBAC) feature
      code 27 AMA records that contain  causes the attendant billing DN to be
these new service feature codes, the    replaced in the AMA record by the
billing program used by the RAC (Re-    source party billing DN when a call is
venue Accounting Center) will require   placed through the attendant position.
modification.                           For information on SBAC, refer to
                                        AT&T 231-090-147.
3.24  The Minimum Recordable Duration
      (MRD) feature provides the ini-   3.28  The WATS calls provide provide a
tial off-hook time as answer time in          customer with service to a pre-
AMA entries for which 2-second minimum  determined area or areas at a rate
chargeable duration (MCD) timing is     based on expected usage. The WATS
performed. A normal chargeable entry    calls are divided into two distinct
is made only when the off-hook signal   and separate service offerings,
persists for at least 2-seconds. If an  OUTWATS and 800 Service (formerly
off-hook signal occurs, but does not    known as INWATS).
persist for longer than two seconds,
the call is considered an MRD call and  (a) The OUTWATS calls provide direct
an MRD record is made. The MRD record       distance dialing access to lines
is nonchargeable and has the same en-       arranged for outward service be-
try type and data groups as the record      tween the customer's line and spe-
which would have been made if the call      cified service areas. The service
had been completed. The AMA record can      may be provided on a full business
be identified as an MRD record by in-       day or on a measured time basis.
formation digit 1 in data group A2          Details of direct dialed 7- or 10-
(digit 1 equals 4, 5, 6, or 7 for no        digit OUTWATS calls are recorded
charge), and optional data group U100       on AMA tape in the OUTWATS serving
is appended with a value of 2 (Table        office. Each transaction is char-
B).                                         acterized by one of two entry
                                            types: entry type 25 or entry
3.25  The Originating Screening Office      type 11 (Table A). Entry type 25
      (OSO) feature utilizes the CCIS
data base for handling 800 Service
(formerly called INWATS) calls. With
the OSO feature, the CCIS data


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AT&T Practice                           AT&T 231-390-063, Appendix 1, Issue 14
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(a) identifies the OUTWATS band used    SSP. The NAP allows customers to ac-
    and the calling station number;     cess the SSP (via POTS) and indirect-
    entry type 11 does not.             ly the Service Control Point (SCP)
                                        customer data base without the need to
(b) The 800 Service allows customers    allocate private lines from each cus-
    to receive calls from the message   tomer site to the ASP SSP office.
    network with the charges for the
    call being billed to the called     3.32  A billing record that shows
    party instead of the calling par-         either the charge number or
    ty. The service may be provided     calling party number that was deliv-
    on a full business day or a mea-    ered to the first office in the ter-
    sured time basis. Full call de-     minating LATA is provided when the NI
    tails may be AMA recorded. An AMA   feature is active. The V66 record is
    record is made of all 800 Service   made in place of the V64 record when-
    calls (abandoned and completed).    ever an Inter-Exchange Carrier (IXC)
    The record of an 800 Service        uses CCS7 signaling to the first of-
    transaction is entered on the AMA   fice in the terminating LATA, and the
    tape as an entry type 29. On in-    IXC provides the calling party or
    complete (abandoned) calls, the     charge number to the first office in
    abandon time is entered in the      the Terminating LATA. If CCS7 is used,
    connect time space and the discon-  but neither the charge number nor the
    nect time space is filled with NCD  calling party number is provided, the
    characters.                         V64 record is generated. Refer to AT&T
                                        231-390-521 for a detailed description
(c) The WATS Administration (WTAD)      of the NI feature.
    feature provides a unique identi-
    fication number for each indivi-    3.33  The ASP/SSP feature provided
    dual WATS member of a SFG. For            services based on feature logic
    detailed information concerning     and data being located at a centraliz-
    WTAD see AT&T 231-090-273.          ed node in the network, rather than in
                                        each individual switching system node.
3.29  The Old Format AMA for SSP Num-   The ASP/SSP feature is partitioned
      ber Services (OFNS) is a group    into 3 phases, each providing differ-
of services that provides inward call   ent capabilities. Refer to AT&T 231-
management and requires dialing of      390-519 for a detailed description of
special numbers that determine call     the ASP/SSP feature.
treatment. In the 1A ESS Switch, the
SSP provides the ability to recognize   ASP1-> When the Service Control Point
Number Service calls and to distribute  (SCP) specifies that ASP/SSP billing
those calls to the appropriate appli-   is to be generated, one of four re-
cation feature. The application fea-    cord types will be generated: Charge
ture (such as 800 Service) interfaces   Type 11 (REGULAR WATS), Charge Type 25
with telephone company data bases at a  (WATS WITH WATS BAND NUMBER), Charge
service control point (SCP) using       Type 1 (STATION PAID), or Charge Type
CCS7.                                   27 (TIE LINE AMA). For each of the
                                        record types, Optional Data Group
3.30  Based on the feature selected,    W2000 will be appended when ASP/SSP
      the SSP Number Services AMA re-   specified billing has been requested.
cords produced at the 1A ESS Switch     W2000 is a 3-character field that con-
SSP office are formatted in either the  tains the Call Code passed by the SCP.
new standard format or in the old       Also, the Service Feature Value (SFV),
format. Selecting automatic message     which is normally derived by the 1A
accounting standard entries (AMASE)     ESS Switch, will be overwritten with
results in new standard format AMA re-  the SFV passed by the SCP. The SFV is
cords being created by the APS of the   a 2-character field. Finally, the Cal-
1A ESS Switch and teleprocessed to the  led Number will be replaced with
RAO. Selecting OFNS results in old      either the Routing Number or the
format AMA records being created by     Outpulsed Number returned by the SCP.
the 1A ESS Switch and written onto      Phase I is available with the 1AE11.09
magnetic tape.                          generic.

3.31  The ASP NAP feature provides      ASP2-> ASP2 is available with the
      a virtual network accesss to      1AE12.01 generic.
private network customers who are
not served directly by a                The ASP/SSP Phase 2 feature provides
                                        the Dialed Number Triggering (DNT)
                                        capability.

                                       If the SCP specified route is Simulated


March 1996                                                             Page 13

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------
Facilities and no SFG billing number    Hunt Group Terminating Number if the
is to be recorded, the number that was  terminating number is in a Multi-Line
triggered on will be recorded as the    Hunt Group, or NCDs for line-to-line
Calling Number (Data Group B2).         calls.

For all other SCP specified routes,     3.36  The Advanced Services Interface
the number that was triggered on will         (ASI) Proxy Feature provides the
be recorded as the Calling Number       ability to support a dialogue between
(Data Group B2).                        the switch and an Intelligent Peri-
                                        pheral (IP) to allow for automatic
DEFAULT BILLING: For a Dialed Number    call handling instructions from the
Trigger (DNT), the default bill is no   IP. The IP can provide the switch
bill with one exception. If the SCP     either the sequences of instructions
specified route is an SFG, then the     for call handling, call extension, and
appropriate WATS record will be gen-    feature access. The V81 type entry
erated. For this scenario, the call     code is available with the 1AE12.04
will always be billed to the SFG DN     and later Generic Programs for AMA
(WATS billing number).                  records of Explicit Access calls to
                                        an IP, when the ASI-Proxy subscriber's
ASP3-> No modifications have been made  line parameter, "Bill all Explicit Ac-
to existing ASP1 and ASP2 records for   cesses Option" is set to yes. The V82
Old Format recording. Off-Hook Delay    type entry code is available with the
(OHD) triggers, developed under ASP3,   1AE12.04 and later Generic Programs
will generate one of the 4 aforemen-    for AMA records of calls extended by
tioned ASP record types.                an IP, when the ASI-Proxy subscriber's
                                        line parameter, "Bill all IP Dial
3.34  The Carrier Identification Code   Calls Option" is set to yes and a
      Expansion (CICE) feature allows   chargeable AMA record does not already
for 4 digit Carrier Identification      exist. Data Group W4000 contains both
Codes (CICs). When a 4 digit Carrier    the Service Code and Subscriber ID
is recorded, Data Group U20000 will     sent to the IP, the "Access Method"
display the CIC and the Carrier Iden-   used (Implicit or Explicit) by the
fier field of Data Group T will con-    ASI-Proxy subscriber to connect up to
tain NCDs. When a 3 digit Carrier is    the IP, and whether the switch provid-
recorded, Data Group U20000 will not    ed DP-to-DTMF conversion (for 1A ESS,
be appended and the Carrier Identifier  set to "1" indicating no conversion).
field of Data Group T will contain the
CIC. If an invalid Carrier is identi-   3.37  Suppressed Ringing (SR) provides
fied, Data Group U20000 will not be           a technology for Utility Tele-
appended, the Carrier Identifier field  metry Services (UTS), where access to
of Data Group T will contain NCDs, and  customer lines is allowed, regardless
the Operator Action field will contain  of the state of assigned features. The
a value of 9. The CICE feature is       1A ESS Switch provides a "pipe" or
available with the 1AE12.00 base        "cut-thru connection" from an incoming
generic.                                trunk to the customer line without
                                        ringing the customer line. Once this
3.35  The Inward Area Telecommunica-    connection is provided, services such
      tions Service (INWATS) AMA Re-    as Meter Reading or Load Shedding can
cording Enhancement (IWAR) improves     be provided to the customer premise.
the information contained in the Sim-
ulated Facilities Usage for WATS field  When a Suppressed Ringing record is
(data group I4) for Line-to-Line        generated, type entry code V01 is
calls. When the IWAR Set Card is set    created with data group A2 set to 11
to 1, a 13-word AMA record will be      indicating Suppressed Ringing.
seized. This will allow for the
recording of the Simulated Facilities   For further information regarding the
Identification Number when the WATS     Suppressed Ringing Feature, see AT&T
Administrative Feature applies, the     Practice 231-390-524.
Multi-Line Hunt Group Terminating Num-
ber if the terminating number is in a
Multi-Line Hunt Group, or the last
four digits of the terminating DN for
line-to-line calls. If the IWAR Set
Card is set to 0, a 9-word AMA
register will be seized and the I4
field will contain the Simulated
Facilities Identification Number
when the WATS Administrative
Feature applies, the Multi-Line


Page 14                                                             March 1996

==============================================================================

AT&T Practice                           AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

4. Abbreviations and Acronyms           BISI
-----------------------------             Busy/Idle Status Indicator

A                                       BLUS
                                          Busy Line Unstricted Source
AC
  Automatic Callback
                                        C
ACBC
  Automatic Callback Calling            CAMA
                                          Centralized Automatic Message
ACC                                       Accounting
  Access Code
                                        CAR
ACRG                                      Computer Access Restriction
  Access Code Restriction Group
                                        CCIS
ACT                                       Common Channel Interoffice Signaling
  Activate Inactive Station
                                        CCPIC
AMA                                       Customer Changeable Primary
  Automatic Message Accounting            InterLATA Carrier

AMASE                                   CCS7
  Automatic Message Accounting            Common Channel Signaling System 7
  Standard Entries
                                        CCSA
APS                                       Common Channel Switching Arrangement
  Attached Processor System
                                        CDAR
AR                                        Customer Dialed Account Recording
  Automatic Recall
                                        CDFP
ASI                                       Centrex Data Facility Pooling
  Advance Services Interface
                                        CEKSN
ASP                                       Centrex Electronic Key Port
  Advanced Services Platform
                                        CFBL
ASP/SSP                                   Call Forwarding Busy Line
  Advanced Services Platform/
  Service Switching Point               CFDA
                                          Call Forwarding Don't Answer
AT
  Access Tandem                         CFG
                                          Customer Facility Group

B                                       CFN
                                          Call Forwarding Number
BCD
  Binary Coded Decimal                  CFUP
                                          Call Forwarding Usage Sensative
BCLID
  Bulk Calling Line Identification      CFUS
                                          Call Forwarding Unrestricted Source


March 1996                                                             Page 15

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

CFV                                     D
  Call Forwarding Variable
                                        DA
CHDR                                      Distinctive Alert
  Charge Daily Timing Reduction
                                        DAMA
CI                                        Directory Assistance Charging
  Carrier Interconnect
                                        DAUS
CIC                                       Don't Answer Unrestricted Source
  Carrier Identification Code
                                        DCN
CICE                                      Direct Connect Number
  Carrier Identification Code
  Expansion                             DCPN
                                          Directed Call Pickup Nonbarge-in
CLINE
  Centrex Electronic Key Line           DCPU
                                          Directed Call Pickup with Barge-in
CPORT
  Centrex Electronic Key Port           DCW
                                          Dial Call Waiting
CPU
  Call Pickup                           DNT
                                          Dialed Number Trigger
CSAID
  Customer Automatic Identification
                                        E
CSDC
  Circuit Switched Digital Capability   EAEO
                                          Equal Access End Office
CSR
  Centrex Station Rearrangements        EEDP
                                          Expanded Electronic Tandem Switching
CT                                        Dialing Plan
  Conference Trunk
                                        EITA
CWD                                       Enhanced Inward Wide Area Telephone
  Call Waiting Deluxe                     Service

CWO                                     ETF
  Call Waiting Originating                Electronic Toll Fraud

CWT                                     ETS
  Call Waiting Terminating                Electronic Tandem Switching

CWUSCC                                  ETSACRE
  Call Waiting Deluxe Usage               Electronic Tandem Switching
  Sensitive Conference Count              Authorization Code Recording


                                        F

                                        FRL
                                          Facility Restriction Level


Page 16                                                             March 1996

==============================================================================

AT&T Practice                           AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

FRS                                     LSF
  Flexible Route Service                  Line Switch Frame

FX
  Foreign Exchange                      M

                                        MBI
G                                         Message Billing Index

GID                                     MCD
  Group Identifier                        Minimum Chargeable Duration

                                        MDC
I                                         Message Desk Center

IC                                      MDR-RAO
  InterLATA Carrier                       Message Detail Recording-
                                          Revenue Accounting Office
ICLID
  Individual Calling Line               MF
  Identification                          Multifrequencies

IDDD                                    MRD
  International Direct Distance           Minimum Recordable Duration
  Dialing
                                        MS
INACT                                     Message Service
  Deactive Station
                                        MSAMA
INC                                       Message Service Automatic Message
  International Carrier                   Accounting Type

INEQ                                    MWI
  Inhibit Electronic Tandem               Message Waiting Indicator
  Switching Queuing

IP                                      N
  Intelligent Peripheral
                                        NAP
IXC                                       Network Access Point
  Inter-Exchange Carrier
                                        NCD
                                          NonCheck Dummy
L
                                        NI
LASS                                      Network Interconnect
  Local Area Signaling Service
                                        NPA
LDCR                                      Numbering Plan Area
  Long Duration Call Recording

LDN
  Listed Directory Number

LEN
  Line Equipment Number


March 1996                                                             Page 17

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

O                                       SBAC
                                          Source Billing of Attendant-
OFNS                                      Handled Calls
  Old Format for Number Service
                                        SCA
OSO                                       Selective Call Acceptance
  Originating Screening Office
                                        SCF
                                          Selective Call Forwarding
P
                                        SCP
PBN                                       Service Control Point
  Port Billing Number
                                        SFG
PFEAT                                     Service Feature Value
  Port Feature
                                        SIGI
PFX                                       Signaling Irregularities
  Prefix
                                        SLE II
POTS                                      Screen Listing Editing daily
  Plain Old Telephone Service             continuation II

PPU                                     SLS
  Periodic Partial Update                 Straight Line Set

PPV                                     SLUS
  Pay Per View                            Subscriber Line Usage Studies

PUC                                     SMDR
  Peripheral Unit Controller              Station Message Detail Recording

                                        SR
R                                         Suppressed Ringing

RAO                                     SSP
  Revenue Accounting Office               Service Switching Point

RAS                                     SST
  Remote Access Service                   Short Supervisory Transition

RCYC                                    STC
  Ring Cycles for Call Forwarding         Station Control
  Don't Answer

RDFP                                    T
  Residential Data Facility Pooling
                                        TAMA
                                          Trunks Automatic Message Accounting
S
                                        TGN
SASCF                                     Trunk Group Number
  Single Activation of Selective
  Call Forwarding                       TN
                                          Trunk Number


Page 18                                                             March 1996

==============================================================================

AT&T Practices                          AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

TNN
  Trunk Network Number

TSSCF
  Total Separation of Selective
  Call Forwarding


U

UCR
  Unidentified Caller Rejection

USTWC
  Usage Sensitive Three-Way Calling

UTS
  Utility Telemetry Service


V

VDI
  Voice/Data Interface

VDP
  Voice/Data Protection

VMWI
  Visual Message Waiting Indicator


W

WATS
  Wide Area Telephone Service

WTAD
  Wide Area Telephone Service
  Administration


X

XMDR
  Extended Message Detail Records


March 1996                                                             Page 19

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 4
------------------------------------------------------------------------------
Table A. AMA Format Chart
------------------------------------------------------------------------------
                                   Data Group (Note)
                            Type   -------------------------------------------
Description                 Entry  Standard
                            Code   -------------------------------------------
                             A1    A2  A3  B2  C  D  G  H  I3 I4 I5 I8 I9 I11
------------------------------------------------------------------------------
Station Paid (1AE8A and      01                      -  -  -  -  -  -  -  -
Later)
------------------------------------------------------------------------------
USTWC (Usage sensitive       01                      -  -  -  -  -  -  -  -
Three-Way Calling) Charge
Record (1AE8A and Later)
------------------------------------------------------------------------------
Suppressed Ringing           01                      -  -  -  -  -  -  -  -
------------------------------------------------------------------------------
DTWX Station Paid            08                      -  -  -  -  -  -  -  -
------------------------------------------------------------------------------
CCSA                         09                      -  -  -  -  -  -  -  -
------------------------------------------------------------------------------
OSO-CCIS INWATS              10                      -  -  -  -  -     -  -
------------------------------------------------------------------------------
OUTWATS (1AE8A and           11                      -  -  -     -  -  -  -
Later)
------------------------------------------------------------------------------
Detail Message Rate-No MBI   15                      -  -  -  -  -  -  -  -
------------------------------------------------------------------------------
Message Rate-Timed           16                   -     -  -  -  -  -  -  -
------------------------------------------------------------------------------
Message Rate-Single          17                -  -     -  -  -  -  -  -  -
Unit Untimed
------------------------------------------------------------------------------
Detail Message Rate-MBI      18                         -  -  -  -  -  -  -
------------------------------------------------------------------------------

See note at end of table.


Page 20                                                             March 1996

==============================================================================

AT&T Practice                           AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------
Table A. AMA Format Chart (Contd)
------------------------------------------------------------------------------
                                   Data Group (Note)
                            Type   -------------------------------------------
Description                 Entry  Standard
                            Code   -------------------------------------------
                             A1    I21 I22 I23 I24 I25 I28 I29 I30 I31 I32
------------------------------------------------------------------------------
Station Paid (1AE8A and      01     -   -   -   -   -   -   -   -   -   -
Later)
------------------------------------------------------------------------------
USTWC (Usage sensitive       01     -   -   -   -   -   -   -   -   -   -
Three-Way Calling) Charge
Record (1AE8A and Later)
------------------------------------------------------------------------------
Suppressed Ringing           01     -   -   -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
DTWX Station Paid            08     -   -   -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
CCSA                         09     -   -   -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
OSO-CCIS INWATS              10     -   -   -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
OUTWATS (1AE8A and           11     -   -   -   -   -   -   -   -   -   -
Later)
------------------------------------------------------------------------------
Detail Message Rate-No MBI   15     -   -   -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
Message Rate-Timed           16     -   -   -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
Message Rate-Single          17     -   -   -   -   -   -   -   -   -   -
Unit Untimed
------------------------------------------------------------------------------
Detail Message Rate-MBI      18     -   -   -   -   -   -   -   -   -   -
------------------------------------------------------------------------------

See note at end of table.


March 1996                                                             Page 21

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 4
------------------------------------------------------------------------------
Table A. AMA Format Chart (Contd)
------------------------------------------------------------------------------
                                   Data Group (Note)
                            Type   -------------------------------------------
Description                 Entry  Standard
                            Code   -------------------------------------------
                             A1    I33 I34 I35 I36 I37 I38 I39 I40  J   L
------------------------------------------------------------------------------
Station Paid (1AE8A and      01     -   -   -   -   -   -   -   -       -
Later)
------------------------------------------------------------------------------
USTWC (Usage sensitive       01     -   -   -   -   -   -   -   -       -
Three-Way Calling) Charge
Record (1AE8A and Later)
------------------------------------------------------------------------------
Suppressed Ringing           01     -   -   -   -   -   -   -   -       -
------------------------------------------------------------------------------
DTWX Station Paid            08     -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
CCSA                         09     -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
OSO-CCIS INWATS              10     -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
OUTWATS (1AE8A and           11     -   -   -   -   -   -   -   -
Later)
------------------------------------------------------------------------------
Detail Message Rate-No MBI   15     -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
Message Rate-Timed           16     -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
Message Rate-Single          17     -   -   -   -   -   -   -   -
Unit Untimed
------------------------------------------------------------------------------
Detail Message Rate-MBI      18     -   -   -   -   -   -   -   -
------------------------------------------------------------------------------

See note at end of table.


Page 22                                                             March 1996

==============================================================================

AT&T Practice                           AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------
Table A. AMA Format Chart (Contd)
------------------------------------------------------------------------------
                                   Data Group (Note)
                            Type   -------------------------------------------
Description                 Entry  Optional
                            Code   -------------------------------------------
                             A1     M   N   P   Q   S   T  U2  U4  U10 U40
------------------------------------------------------------------------------
Station Paid (1AE8A and      01     -   -   -   -   -   -   -   -   -   -
Later)
------------------------------------------------------------------------------
USTWC (Usage sensitive       01     -   -   -   -   -   -   -   -   -   -
Three-Way Calling) Charge
Record (1AE8A and Later)
------------------------------------------------------------------------------
Suppressed Ringing           01     -   -   -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
DTWX Station Paid            08         -           -   -       -   -   -
------------------------------------------------------------------------------
CCSA                         09         -           -   -       -   -
------------------------------------------------------------------------------
OSO-CCIS INWATS              10         -           -   -       -
------------------------------------------------------------------------------
OUTWATS (1AE8A and           11         -                       -
Later)
------------------------------------------------------------------------------
Detail Message Rate-No MBI   15         -           -   -       -   -
------------------------------------------------------------------------------
Message Rate-Timed           16         -           -   -   -   -   -
------------------------------------------------------------------------------
Message Rate-Single          17         -           -   -   -   -   -
Unit Untimed
------------------------------------------------------------------------------
Detail Message Rate-MBI      18         -           -   -       -   -
------------------------------------------------------------------------------

See note at end of table.


March 1996                                                             Page 23

==============================================================================

AT&T 231-390-063 Appendix 1, Issue 14
------------------------------------------------------------------------------
Table A. AMA Format Chart (Contd)
------------------------------------------------------------------------------
                                   Data Group (Note)
                            Type   -------------------------------------------
Description                 Entry  Optional
                            Code   -------------------------------------------
                             A1    U100 U10000 U20000 W400 W2000 W4000 W10000
------------------------------------------------------------------------------
Station Paid (1AE8A and      01     -     -      -     -     -           -
Later)
------------------------------------------------------------------------------
USTWC (Usage sensitive       01     -     -      -     -     -           -
Three-Way Calling) Charge
Record (1AE8A and Later)
------------------------------------------------------------------------------
Suppressed Ringing           01     -     -      -     -     -           -
------------------------------------------------------------------------------
DTWX Station Paid            08                  -     -     -           -
------------------------------------------------------------------------------
CCSA                         09                  -     -     -           -
------------------------------------------------------------------------------
OSO-CCIS INWATS              10                  -     -     -           -
------------------------------------------------------------------------------
OUTWATS (1AE8A and           11                        -                 -
Later)
------------------------------------------------------------------------------
Detail Message Rate-No MBI   15                  -     -     -           -
------------------------------------------------------------------------------
Message Rate-Timed           16                  -     -     -           -
------------------------------------------------------------------------------
Message Rate-Single          17                  -     -     -           -
Unit Untimed
------------------------------------------------------------------------------
Detail Message Rate-MBI      18                  -     -     -           -
------------------------------------------------------------------------------

See note at end of table.


Page 24                                                             March 1996

==============================================================================

AT&T Practice                           AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------
Table A. AMA Format Chart (Contd)
------------------------------------------------------------------------------
                                   Data Group (Note)
                            Type   -------------------------------------------
Description                 Entry  Standard
                            Code   -------------------------------------------
                             A1    A2  A3  B2  C  D  G  H  I3 I4 I5 I8 I9 I11
------------------------------------------------------------------------------
Conference Trunk Usage       19    -   -   -   -  -  -     -  -  -  -  -  -
------------------------------------------------------------------------------
Detail Message Rate-         22                         -  -  -  -  -  -  -
Timed
------------------------------------------------------------------------------
Detail Message Rate-         23                -        -  -  -  -  -  -  -
Untimed
------------------------------------------------------------------------------
OUTWATS-Station Detail       25                         -  -     -  -  -  -
(1AE8A and Later)
------------------------------------------------------------------------------
Call Forwarding Usage        26                      -  -  -  -     -  -  -
(Nonbusiness)
------------------------------------------------------------------------------
Message Detail Recording     27                   -  -  -     -  -  -  -  -
on Tie Lines
------------------------------------------------------------------------------
800 Service Call             29                   -  -  -  -     -  -  -  -
------------------------------------------------------------------------------
Directory Assistance         30                -  -  -  -  -  -  -  -  -  -
Charging (Bulk-Billing)
------------------------------------------------------------------------------
CSDC                         48                      -  -  -  -  -
------------------------------------------------------------------------------
USTWC Activation Record      49                -  -  -  -  -  -  -  -  -  -
(1AE8A and Later)
------------------------------------------------------------------------------

See note at end of table.


March 1996                                                             Page 25

==============================================================================

AT&T Practice                           AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------
Table A. AMA Format Chart (Contd)
------------------------------------------------------------------------------
                                   Data Group (Note)
                            Type   -------------------------------------------
Description                 Entry  Standard
                            Code   -------------------------------------------
                             A1    I21 I22 I23 I24 I25 I28 I29 I30 I31 I32
------------------------------------------------------------------------------
Conference Trunk Usage       19     -   -   -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
Detail Message Rate-         22     -   -   -   -   -   -   -   -   -   -
Timed
------------------------------------------------------------------------------
Detail Message Rate-         23     -   -   -   -   -   -   -   -   -   -
Untimed
------------------------------------------------------------------------------
OUTWATS-Station Detail       25     -   -   -   -   -   -   -   -   -   -
(1AE8A and Later)
------------------------------------------------------------------------------
Call Forwarding Usage        26     -   -   -   -   -   -   -   -   -   -
(Nonbusiness)
------------------------------------------------------------------------------
Message Detail Recording     27     -   -   -   -   -   -   -   -   -   -
on Tie Lines
------------------------------------------------------------------------------
800 Service Call             29     -   -   -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
Directory Assistance         30     -   -   -   -   -   -   -   -   -   -
Charging (Bulk-Billing)
------------------------------------------------------------------------------
CSDC                         48     -   -   -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
USTWC Activation Record      49     -   -   -   -   -   -   -   -   -   -
(1AE8A and Later)
------------------------------------------------------------------------------

See note at end of table.


Page 26                                                             March 1996

==============================================================================

AT&T Practices                          AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------
Table A. AMA Format Chart (Contd)
------------------------------------------------------------------------------
                                   Data Group (Note)
                            Type   -------------------------------------------
Description                 Entry  Standard
                            Code   -------------------------------------------
                             A1    I33 I34 I35 I36 I37 I38 I39 I40  J   L
------------------------------------------------------------------------------
Conference Trunk Usage       19     -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
Detail Message Rate-         22     -   -   -   -   -   -   -   -
Timed
------------------------------------------------------------------------------
Detail Message Rate-         23     -   -   -   -   -   -   -   -
Untimed
------------------------------------------------------------------------------
OUTWATS-Station Detail       25     -   -   -   -   -   -   -   -
(1AE8A and Later)
------------------------------------------------------------------------------
Call Forwarding Usage        26     -   -   -   -   -   -   -   -       -
(Nonbusiness)
------------------------------------------------------------------------------
Message Detail Recording     27     -   -   -   -   -   -   -   -
on Tie Lines
------------------------------------------------------------------------------
800 Service Call             29     -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
Directory Assistance         30     -   -   -   -   -   -   -   -
Charging (Bulk-Billing)
------------------------------------------------------------------------------
CSDC                         48     -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
USTWC Activation Record      49     -   -   -   -   -   -   -   -       -
(1AE8A and Later)
------------------------------------------------------------------------------

See note at end of table.


March 1996                                                             Page 27

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------
Table A. AMA Format Chart (Contd)
------------------------------------------------------------------------------
                                   Data Group (Note)
                            Type   -------------------------------------------
Description                 Entry  Optional
                            Code   -------------------------------------------
                             A1     M   N   P   Q   S   T  U2  U4  U10 U40
------------------------------------------------------------------------------
Conference Trunk Usage       19         -           -   -   -   -   -   -
------------------------------------------------------------------------------
Detail Message Rate-         22         -           -   -   -   -   -   -
Timed
------------------------------------------------------------------------------
Detail Message Rate-         23         -           -   -   -   -   -   -
Untimed
------------------------------------------------------------------------------
OUTWATS-Station Detail       25         -                       -
(1AE8A and Later)
------------------------------------------------------------------------------
Call Forwarding Usage        26     -   -   -   -   -   -   -   -   -   -
(Nonbusiness)
------------------------------------------------------------------------------
Message Detail Recording     27         -               -       -   -
on Tie Lines
------------------------------------------------------------------------------
800 Service Call             29         -           -   -   -   -   -
------------------------------------------------------------------------------
Directory Assistance         30         -       -   -   -   -   -   -   -
Charging (Bulk-Billing)
------------------------------------------------------------------------------
CSDC                         48         -           -           -
------------------------------------------------------------------------------
USTWC Activation Record      49     -   -   -   -   -   -   -   -   -   -
(1AE8A and Later)
------------------------------------------------------------------------------

See note at end of table.


Page 28                                                             March 1996

==============================================================================

AT&T Practice                           AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------
Table A. AMA Format Chart (Contd)
------------------------------------------------------------------------------
                                   Data Group (Note)
                            Type   -------------------------------------------
Description                 Entry  Optional
                            Code   -------------------------------------------
                             A1    U100 U10000 U20000 W400 W2000 W4000 W10000
------------------------------------------------------------------------------
Conference Trunk Usage       19                  -     -     -           -
------------------------------------------------------------------------------
Detail Message Rate-         22                  -     -     -           -
Timed
------------------------------------------------------------------------------
Detail Message Rate-         23                  -     -     -           -
Untimed
------------------------------------------------------------------------------
OUTWATS-Station Detail       25                        -                 -
(1AE8A and Later)
------------------------------------------------------------------------------
Call Forwarding Usage        26     -     -      -     -     -           -
(Nonbusiness)
------------------------------------------------------------------------------
Message Detail Recording     27                  -     -                 -
on Tie Lines
------------------------------------------------------------------------------
800 Service Call             29     -     -      -     -     -           -
------------------------------------------------------------------------------
Directory Assistance         30                  -     -     -           -
Charging (Bulk-Billing)
------------------------------------------------------------------------------
CSDC                         48                        -     -           -
------------------------------------------------------------------------------
USTWC Activation Record      49     -     -      -     -     -           -
(1AE8A and Later)
------------------------------------------------------------------------------

See note at end of table.


March 1996                                                             Page 29

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 4
------------------------------------------------------------------------------
Table A. AMA Format Chart
------------------------------------------------------------------------------
                                   Data Group (Note)
                            Type   -------------------------------------------
Description                 Entry  Standard
                            Code   -------------------------------------------
                             A1    A2  A3  B2  C  D  G  H  I3 I4 I5 I8 I9 I11
------------------------------------------------------------------------------
Originating Exchange CI      63    (See Table C*)
Overflow Record
------------------------------------------------------------------------------
Terminating Access Record    64                      -  -  -  -  -  -  -  -
(1AE8A and Later)
------------------------------------------------------------------------------
NI Terminating               66                      -  -  -  -  -  -  -  -
Access Record
------------------------------------------------------------------------------
Originating Exchange CI      67    (See Table AD)
Overflow Record (1AE12
and later)
------------------------------------------------------------------------------
LASS (1AE9 and Later)        70    (See Table D)
------------------------------------------------------------------------------
CDFP                         71                   -  -  -  -  -  -  -  -  -
------------------------------------------------------------------------------
CCPIC                        73    (See Table E*)
------------------------------------------------------------------------------
RAS                          74                -     -  -  -  -  -  -  -  -
------------------------------------------------------------------------------
OFNS (1AE10.01 and Later)    75                      -  -  -  -  -  -  -  -
------------------------------------------------------------------------------
SCA, CAR, and SLEII          76    (See Table F)
------------------------------------------------------------------------------
ASP NAP                      79    (Same as 01)
------------------------------------------------------------------------------
ASI-Proxy                    81                      -  -  -  -  -  -  -  -
Explicit Access
------------------------------------------------------------------------------
ASI-Proxy IP                 82                      -  -  -  -  -  -  -  -
Dialed
------------------------------------------------------------------------------
CSR Ext Number Change        85    (See Table G*)
------------------------------------------------------------------------------
Station Feature Assignment   86    (See Table H*)
Change
------------------------------------------------------------------------------
Station Verification         87    (See Table K*)
------------------------------------------------------------------------------
Feature Verification         88    (See Table L*)
------------------------------------------------------------------------------
Signaling Irregularities     91                   -  -  -     -  -  -  -  -
------------------------------------------------------------------------------

See note at end of table.


Page 30                                                             March 1996

==============================================================================

AT&T Practice                           AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------
Table A. AMA Format Chart (Contd)
------------------------------------------------------------------------------
                                   Data Group (Note)
                            Type   -------------------------------------------
Description                 Entry  Standard
                            Code   -------------------------------------------
                             A1    I21 I22 I23 I24 I25 I28 I29 I30 I31 I32
------------------------------------------------------------------------------
Originating Exchange CI      63    (See Table C*)
Overflow Record
------------------------------------------------------------------------------
Terminating Access Record    64     -   -   -   -   -   -   -   -   -   -
(1AE8A and Later)
------------------------------------------------------------------------------
NI Terminating               66     -   -   -   -   -   -   -   -   -   -
Access Record
------------------------------------------------------------------------------
Originating Exchange CI      67     (See Table AD)
Overflow Record (1AE12
and later)
------------------------------------------------------------------------------
LASS (1AE9 and Later)        70     (See Table D)
------------------------------------------------------------------------------
CDFP                         71     -   -   -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
CCPIC                        73     (See Table E*)
------------------------------------------------------------------------------
RAS                          74     -   -   -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
OFNS (1AE10.01 and Later)    75     -   -   -   -   -
------------------------------------------------------------------------------
SCA, CAR, and SLEII          76     (See Table F)
------------------------------------------------------------------------------
ASP NAP                      79     -   -   -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
ASI-Proxy                    81     -   -   -   -   -   -   -   -   -   -
Explicit Access
------------------------------------------------------------------------------
ASI-Proxy IP                 82     -   -   -   -   -   -   -   -   -   -
Dialed
------------------------------------------------------------------------------
CSR Ext Number Change        85     (See Table G*)
------------------------------------------------------------------------------
Station Feature Assignment   86     (See Table H*)
Change
------------------------------------------------------------------------------
Station Verification         87     (See Table K*)
------------------------------------------------------------------------------
Feature Verification         88     (See Table L*)
------------------------------------------------------------------------------
Signaling Irregularities     91     -   -   -   -   -   -   -   -   -   -
------------------------------------------------------------------------------

See note at end of table.

March 1996                                                             Page 31

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------
Table A. AMA Format Chart (Contd)
------------------------------------------------------------------------------
                                   Data Group (Note)
                            Type   -------------------------------------------
Description                 Entry  Standard
                            Code   -------------------------------------------
                             A1    I33 I34 I35 I36 I37 I38 I39 I40  J   L
------------------------------------------------------------------------------
Originating Exchange CI      63    (See Table C*)
Overflow Record
------------------------------------------------------------------------------
Terminating Access Record    64     -   -   -   -   -   -   -   -   -
(1AE8A and Later)
------------------------------------------------------------------------------
NI Terminating               66     -   -   -   -   -   -   -   -   -
Access Record
------------------------------------------------------------------------------
Originating Exchange CI      67    (See Table AD)
Overflow Record (1AE12
and later)
------------------------------------------------------------------------------
LASS (1AE9 and Later)        70    (See Table D)
------------------------------------------------------------------------------
CDFP                         71     -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
CCPIC                        73    (See Table E*)
------------------------------------------------------------------------------
RAS                          74     -   -   -   -   -   -   -   -       -
------------------------------------------------------------------------------
OFNS (1AE10.01 and Later)    75     -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
SCA, CAR, and SLEII          76    (See Table F)
------------------------------------------------------------------------------
ASP NAP                      79     -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
ASI-Proxy                    81     -   -   -   -   -   -   -   -
Explicit Access
------------------------------------------------------------------------------
ASI-Proxy IP                 82     -   -   -   -   -   -   -   -
Dialed
------------------------------------------------------------------------------
CSR Ext Number Change        85    (See Table G*)
------------------------------------------------------------------------------
Station Feature Assignment   86    (See Table H*)
Change
------------------------------------------------------------------------------
Station Verification         87    (See Table K*)
------------------------------------------------------------------------------
Feature Verification         88    (See Table L*)
------------------------------------------------------------------------------
Signaling Irregularities     91     -   -   -   -   -   -   -   -
------------------------------------------------------------------------------

See note at end of table.

Page 32                                                             March 1996

==============================================================================

AT&T Practice                           AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------
Table A. AMA Format Chart (Contd)
------------------------------------------------------------------------------
                                   Data Group (Note)
                            Type   -------------------------------------------
Description                 Entry  Optional
                            Code   -------------------------------------------
                             A1     M   N   P   Q   S   T  U2  U4  U10 U40
------------------------------------------------------------------------------
Originating Exchange CI      63    (See Table C*)
Overflow Record
------------------------------------------------------------------------------
Terminating Access Record    64                     -       -   -   -   -
(1AE8A and Later)
------------------------------------------------------------------------------
NI Terminating               66                     -       -   -   -   -
Access Record
------------------------------------------------------------------------------
Originating Exchange CI      67    (See Table AD)
Overflow Record (1AE12
and later)
------------------------------------------------------------------------------
LASS (1AE9 and Later)        70    (See Table D)
------------------------------------------------------------------------------
CDFP                         71         -           -   -       -
------------------------------------------------------------------------------
CCPIC                        73    (See Table E*)
------------------------------------------------------------------------------
RAS                          74     -   -   -   -   -   -   -   -   -   -
------------------------------------------------------------------------------
OFNS (1AE10.01 and Later)    75                             -   -       -
------------------------------------------------------------------------------
SCA, CAR, and SLEII          76    (See Table F)
------------------------------------------------------------------------------
ASP NAP                      79                                 -
------------------------------------------------------------------------------
ASI-Proxy                    81         -               -   -   -   -
Explicit Access
------------------------------------------------------------------------------
ASI-Proxy IP                 82         -               -   -   -   -
Dialed
------------------------------------------------------------------------------
CSR Ext Number Change        85    (See Table G*)
------------------------------------------------------------------------------
Station Feature Assignment   86    (See Table H*)
Change
------------------------------------------------------------------------------
Station Verification         87    (See Table K*)
------------------------------------------------------------------------------
Feature Verification         88    (See Table L*)
------------------------------------------------------------------------------
Signaling Irregularities     91         -           -   -   -           -
------------------------------------------------------------------------------

See note at end of table.

March 1996                                                             Page 33

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------
Table A. AMA Format Chart (Contd)
------------------------------------------------------------------------------
                                   Data Group (Note)
                            Type   -------------------------------------------
Description                 Entry  Optional
                            Code   -------------------------------------------
                             A1    U100 U10000 U20000 W400 W2000 W4000 W10000
------------------------------------------------------------------------------
Originating Exchange CI      63    (See Table C*)
Overflow Record
------------------------------------------------------------------------------
Terminating Access Record    64                        -     -
(1AE8A and Later)
------------------------------------------------------------------------------
NI Terminating               66                        -     -
Access Record
------------------------------------------------------------------------------
Originating Exchange CI      67    (See Table AD)
Overflow Record (1AE12
and later)
------------------------------------------------------------------------------
LASS (1AE9 and Later)        70    (See Table D)
------------------------------------------------------------------------------
CDFP                         71                   -    -     -           -
------------------------------------------------------------------------------
CCPIC                        73    (See Table E*)
------------------------------------------------------------------------------
RAS                          74     -      -      -    -     -           -
------------------------------------------------------------------------------
OFNS (1AE10.01 and Later)    75                              -
------------------------------------------------------------------------------
SCA, CAR, and SLEII          76    (See Table F)
------------------------------------------------------------------------------
ASP NAP                      79                              -
------------------------------------------------------------------------------
ASI-Proxy                    81            -      -    -     -           -
Explicit Access
------------------------------------------------------------------------------
ASI-Proxy IP                 82            -      -    -     -           -
Dialed
------------------------------------------------------------------------------
CSR Ext Number Change        85    (See Table G*)
------------------------------------------------------------------------------
Station Feature Assignment   86    (See Table H*)
Change
------------------------------------------------------------------------------
Station Verification         87    (See Table K*)
------------------------------------------------------------------------------
Feature Verification         88    (See Table L*)
------------------------------------------------------------------------------
Signaling Irregularities     91                   -    -     -           -
------------------------------------------------------------------------------

Note:

 A "" indicates that a data group may be used for the type entry code listed.
 A "-" indicates that a data group is not used for the type entry code listed.
 A "*" indicates that the data groups are not used.
 Data group W10000 may be used for any data group that can contain data
  group N.

Page 34                                                             March 1996

==============================================================================

AT&T Practice                           AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table B. AMA Data Groups
------------------------------------------------------------------------------
                                                          AMA       AMA
Data                                                      Chars./   Chars./
Group Information                                         Item      Group
------------------------------------------------------------------------------
A2    First Information Digit:                            1         4

      0-Neither traffic service observed or traffic
        sampled mcharged
      1-Traffic service observed - charged
      2-Traffic sampled - charged
      3-Traffic service observed and traffic sampled -
        charged
      4-Traffic sampled - no charge
      5-Traffic service observed and traffic sampled -
        no charge
      6-Traffic service observed but not traffic
        sampled - no charge
      7-Neither traffic service observed nor traffic
        sampled - no charge

      Second Information Digit:                           1

      0-Neither operator dialed, operator identified,
        nor time charged
      1-Time change
      2-Operator dialed
      3-Operator dialed and time change
      4-Operator identified
      5-Operator identified and time change
      6-Operator dialed and identified
      7-Operator dialed, operator identified, and time
        change
      9-Terminating CI test call

      Service Features: (Also see paragraph 2.07)         2

      00-Other (none of the service features below)
      01-Coin
      02-Hotel-Motel
      06-Centrex Attendant
      08-800 Service
      10-3-Way Calling Service
      11-Suppressed Ringing
      12-Call Forwarding
      14-CFBL/DA (Call Forwarding Busy Line/Don't
         Answer
      15-CSDC (Circuit Switched Digital Capability)
      17-RCF (Remote Call Forwarding)
      18-USTWC (Usage Sensitive Three-Way Calling)
      19-MDR-RAO (Message Detail Recording-Revenue
         Accounting Office
      26-ASP terminating access
      32-AC delayed processing after reactivation
------------------------------------------------------------------------------

March 1996                                                             Page 35

==============================================================================
 
AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table B. AMA Data Groups (Contd)
------------------------------------------------------------------------------
                                                          AMA       AMA
Data                                                      Chars./   Chars./
Group     Information                                     Item      Groups
------------------------------------------------------------------------------
A2        33-AR delayed processing after reactivation
(Contd)   34-AC busy ringback after reactivation
          35-AR busy ringback after reactivation
          36-AC timeout after reactivation
          37-AR timeout after reactivation
          38-AC deactivation after reactivation
          39-AR deactivation after reactivation
          52-TSSCF (activation/deactivation)
          53-SLE II (Screen List Editing daily
             continuation II)
          57-CDFP (Centrex Data Facility Pooling)
             Private Facility Pooling
          58-CDFP Network Modem Pooling
          59-RDFP (Residential Data Facility Pooling)
          60-Automatic Recall incoming immediate
          61-Automatic Recall outgoing immediate
          62-Automatic Recall incoming delayed
          63-Automatic Recall outgoing delayed
          64-Automatic Recall incoming busy ringback
          65-Automatic Recall outgoing busy ringback
          66-Automatic Recall incoming time-out
          67-Automatic Recall outgoing time-out
          68-Automatic Recall incoming deactivation
          69-Automatic Recall outgoing deactivation
          70-Customer Originated Trace activation
          71-SCF screen list editing (activation/
             deactivation)
          72-Selective Call Rejecting screen list
             editing
          73-Distinctive Alert screen list editing
             (activation/deactivation)
          74-Screen List Editing daily continuation I
          75-Originating end per call privacy
          76-SASCF (Single Activation SCF)
             (activation/deactivation)
          85-Entry Type V27 (five digits dialed)
          85-Entry Type V70 (NNDA or NNP)
          86-Entry Type V27 (six digits dialed)
          86-Entry Type V70 (NAP)
          87-Entry Type V27 (seven digits dialed
          95-Two Level AR/AC (Automatic Recall/
             Callback) (activation/deactivation)
          98-SCA (Selective Call Acceptance)
             (activation/deactivation)
          99-CAR (Computer Access Restriction)
             (activation/deactivation)
------------------------------------------------------------------------------

Page 36                                                             March 1996

==============================================================================

AT&T Practice                           AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table B. AMA Data Groups (Contd)
------------------------------------------------------------------------------
                                                          AMA       AMA
Data                                                      Chars./   Chars./
Group     Information                                     Item      Groups
------------------------------------------------------------------------------
A3        Connect Time:                                             8

          NCD (noncheck dummy) character or 9             1
          (RAO Study Call)
            Hours                                         2
            Minutes                                       2
            Seconds                                       2
            Tenths of seconds                             1
------------------------------------------------------------------------------
B2        Calling Number (Originating Number)             7         7
------------------------------------------------------------------------------
C         Disconnect Time:                                          8

            Midnights passed                              1
            Hours                                         2
            Minutes                                       2
            Seconds                                       2
            Tenths of seconds                             1
------------------------------------------------------------------------------
D         Called Number (Destination Number):                       10

            NPA digits if dialed; otherwise, NCDs         3
            Directory number                              7
------------------------------------------------------------------------------
G         Message Billing Index or WATS Band              2         2
------------------------------------------------------------------------------
H         CT (Conference Trunk) Usage:                              24

            NCD                                           1
            CT seizure time:

            Hours                                         2
            Minutes                                       2
            Seconds                                       2
            Tenths of seconds                             1
          Calling Number                                  7
          Midnights passed                                1

          CT release time:

            Hours                                         2
            Minutes                                       2
            Seconds                                       2
            Tenths of seconds                             1
          CT ports used                                   1
------------------------------------------------------------------------------

March 1996                                                             Page 37

==============================================================================
 
AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table B. AMA Data Groups (Contd)
------------------------------------------------------------------------------
                                                          AMA       AMA
Data                                                      Chars./   Chars./
Group     Information                                     Item      Groups
------------------------------------------------------------------------------
I3        Dialed digits for type entry code 27            24        24
                     or
          Detected MF digits for type entry code 91
------------------------------------------------------------------------------
I4        Simulated Facilities Usage for WATS                       5
            Charge indicator:                             1

            NCD-800 Service
             1-OUTWATS full business day
             2-OUTWATS measured time                       4
          Pseudo trunk number
------------------------------------------------------------------------------
I5        Date of Call Forwarding Activation/                       4
          Deactivation
            Month                                         2
            Day                                           2
------------------------------------------------------------------------------
I8        Terminating Company data applicable only to               4
          CCIS INWATS OSO data base; otherwise, this
          field contains all zeros
------------------------------------------------------------------------------
I9        CSDC (Circuit Switching Digital Capability)     1         1
          Indicator (type entry code 48)
------------------------------------------------------------------------------
I11       CSDC Data Rate Indicator                        1         1
------------------------------------------------------------------------------
I21       LASS (Local Area Signaling Services)
          Function Code:                                  2
            00-Not applicable
            01-Activate
            02-Not activate
            03-Delete
            04-Create new LASS function option
------------------------------------------------------------------------------
I22       LASS Function Status Code I:                    3
            000-Not applicable
            001-SCF (Selective Call Forwarding) active
            002-SCR (Selective Call Rejection) active
            003-SCF and SCR active
            004-DA (Distinctive Alert) active
            005-SCF and DA active
            006-SCR and DA active
            007-SCF, SCR, and DA active
            010-SASCF active
            012-SASCF and SCR active
            014-SASCF and DA active
            016-SASCF, DA, and SCR active
            020-TSSCF active
            022-TSSCF and SCR active
            024-TSSCF and DA active
            026-TSSCF, SCR, and DA active
------------------------------------------------------------------------------

Page 38                                                             March 1996

==============================================================================
 
AT&T Practice                           AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table B. AMA Data Groups (Contd)
------------------------------------------------------------------------------
                                                          AMA       AMA
Data                                                      Chars./   Chars./
Group     Information                                     Item      Groups
------------------------------------------------------------------------------
I23       LASS SCF screen list size                       2
------------------------------------------------------------------------------
I24       LASS SCR screen list size                       2
------------------------------------------------------------------------------
I25       LASS DA screen list size                        2
------------------------------------------------------------------------------
I28       OFNS dialed number                              10
------------------------------------------------------------------------------
I29       OFNS number service customer's RAO              3
------------------------------------------------------------------------------
I30       OFNS originating LATA                           3
------------------------------------------------------------------------------
I31       OFNS call type (call code)                      3
------------------------------------------------------------------------------
I32       OFNS structure code                             4
------------------------------------------------------------------------------
I33       LASS Feature Status Code II:
            000-Not applicable
            001-SCA active
            002-CAR active
            003-CAR and SCA active
------------------------------------------------------------------------------
I34       LASS SCA Screen list size
------------------------------------------------------------------------------
I35       LASS CAR Screen list size
------------------------------------------------------------------------------
I36-I40   Screen list size reserved
------------------------------------------------------------------------------
J         NPA Digits (for originating station) (Not       3         3
          optional for OFNS and NI terminating access
          records)
------------------------------------------------------------------------------
L         Entry Extender (character "Y")                  1         1
------------------------------------------------------------------------------
M         Data group indicator:                                     2
            First Digit:                                  1
              0-Neither data group N, P, nor Q
              1-Data group Q
              2-Data group P
              3-Data groups P and Q
              4-Data group N
              5-Data groups N and Q
              6-Data groups N and P
              7-Data groups N, P, and Q
            Second Digit:                                 1
              0-Neither data group R, S, nor T
              1-Data group T
              2-Data group S
              3-Data groups S and T
------------------------------------------------------------------------------

March 1996                                                             Page 39

==============================================================================
 
AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table B. AMA Data Groups (Contd)
------------------------------------------------------------------------------
                                                          AMA       AMA
Data                                                      Chars./   Chars./
Group     Information                                     Item      Groups
------------------------------------------------------------------------------
N         Overseas Number Expander (Destination)          2         2
------------------------------------------------------------------------------
P         Data Group U Indicator:                         5         5
            00002-Data group U2
            00004-Data group U4
            00010-Data group U10
            00040-Data group U40
            00100-Data group U100
            10000-Data group U10000
            20000-Data group U20000
              Note: Indicator  values are cumulative.
              For example, a value of 00006 indicates
              data groups U2 and U4.
------------------------------------------------------------------------------
Q         Trunk Network Number                            6         6
------------------------------------------------------------------------------
S         Data Group W Indicator:                         5         5
            00400-Data group W400
            02000-Data group W2000
            04000-Data group W4000
            10000-Data group W10000
              Note: Indicator values are cumulative.
              For example, a value of 10400 indicates
              data groups W400 and W10000.
------------------------------------------------------------------------------
T         CI (Carrier Interconnect) Data:                           25
            IC/INC Prefix:                                4
              Carrier identifier (3 digits)
            Operator data (1 digit):
              0-Operator requested
              1-Operator not requested
              2-Not determined if operator requested
                or originating exchange overflow
                record
              9-IEC/INC Unknown
          Carrier Connect Time:
            Time Change Indicator:                        1
              NCD-No time change
              0-time change (answer to disconnect)
              1-time change (carrier connect to
                answer)
              2-time change (answer to disconnect)
              3-time change (carrier connect to
                answer-test call)
            Hours                                         2
            Minutes                                       2
            Seconds                                       2
            Tenths of seconds                             1
            Carrier Connect Time:
              Month                                       2
              Day                                         2
------------------------------------------------------------------------------

Page 40                                                             March 1996

==============================================================================

AT&T Practice                           AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table B. AMA Data Groups (Contd)
------------------------------------------------------------------------------
                                                          AMA       AMA
Data                                                      Chars./   Chars./
Group     Information                                     Item      Groups
------------------------------------------------------------------------------
T         IC/INC Call Event Status                        2
(Contd)     00-Reserved
            01-First wink from IC/INC
            02-Abandon or time-out before dialing is
               complete
            03-Second start dial wink
            04-Time-out waiting for acknowledgement
            05-Operator services or CAMA
            06-Call terminated (network management
               feature
            07-Acknowledgement wink received
            08-Invalid called number
            09-All failures
            10-Answer
            11-Time-out waiting for second start dial
               wink
            12-Operator service or CAMA time-out for
               off-hook
            13-Off-hook rather than second start dial
               wink for calls utilizing INC signaling
               (originating exchange)
          Routing Indicator:                              1
            Originating
              0-Non-CCS7 direct TGN
              1-Non-CCS7 common TGN (EAEO to AT TGN)
              2-CCS7 direct TGN
              3-CCS7 AT TGN (AT to IC/INC TGN)
              4-CCS7 EO TGN (CCS7 to EAMF interworking
            Terminating
              0-Non-CCS7 direct TGN
              1-Non-CCS7 (IC/INC to AT) non-CCS7 (AT
                to EO)
              2-CCS7 direct TGN
              3-CCS7 (IC/INC to AT) CCS7 (AT to EO)
              4-Non-CCS7 (IC/INC to AT) CCS7 (AT to EO)
              5-CCS7 (IC/INC to AT) non-CCS7 (AT to EO)
            Dialing Indicator (originating exchange):
              1-PIC or default carrier                    1
              2-10XXX dialed
              3-950-1XXX dialed
            NCD-Terminating exchange record (V64 and V66)
------------------------------------------------------------------------------

March 1996                                                             Page 41

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table B. AMA Data Groups (Contd)
------------------------------------------------------------------------------
                                                          AMA       AMA
Data                                                      Chars./   Chars./
Group     Information                                     Item      Groups
------------------------------------------------------------------------------
T         ANI/CPN Indicator                               1
(Contd)     0-No ANI/CPN provided
            1-ANI provided
            2-CPN provided
            3-ANI and CPN provided
            NCD-Terminating exchange record (V64 only)
          Trunk Group Number                              4
------------------------------------------------------------------------------
U2        Customer Accounting Code                        8         8
------------------------------------------------------------------------------
U4        End of SST (short supervisory transition)       8         8
          Time (for type entry code 91)
------------------------------------------------------------------------------
U10       SIGI/LDCR Status Information:                   2         2

            02-No answer (SIGI status)
            03-All ETF investigation facilities were
               available (SIGI status)
            10-Start of long duration call (LDCR
               status)
            11-Continuation of long duration call
               (LDCR status)
            12-End of long duration call (LDCR status)
            13-Start of long duration call with SIGI
            14-Continuation of long duration call with
               SIGI
            15-End of long duration call with SIGI
            30-SIGI record (type entry code 91) also
               made for this call (SIGI status)
            40-SST not investigated because ETF
               investigation facilities not available
               (SIGI status)
------------------------------------------------------------------------------
U40       Customer Identification                         4         4
------------------------------------------------------------------------------
U100      Minimum Recordable Duration Indicator           1         1
------------------------------------------------------------------------------
U10000    02-AR/AC Return Call to Number Sent Public      2         2
          03-AR/AC Return Call to Number Sent Private     2         2
------------------------------------------------------------------------------
U20000    IC/INC Prefix: Carrier Identifier               4         4
------------------------------------------------------------------------------
W400      OFNS Alternate Billing Number                   10        10
------------------------------------------------------------------------------
W2000     ASP/SSP Call Code                               3         3
------------------------------------------------------------------------------

Page 42                                                             March 1996

==============================================================================

AT&T Practice                           AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table B. AMA Data Groups (Contd)
------------------------------------------------------------------------------
                                                          AMA       AMA
Data                                                      Chars./   Chars./
Group     Information                                     Item      Groups
------------------------------------------------------------------------------
W4000     IP Service Code                                 5         17
            Service Code digits sent to the IP
            are right justified.

          Access Method                                   1
            Type of access to IP
              1-Implicit Access
              2-Explicit Access
              3-Reserved
              4-Reserved
              5-Reserved

          Subscriber ID                                   10
            Subscriber ID sent to IP
            is right justified.

          Conversion Indication                           1
            1-No conversion used
            2-DP-to-DTMF conversion used
------------------------------------------------------------------------------
W10000    Country Code Length                             1         4
          Overseas digits 13, 14, 15                      3
------------------------------------------------------------------------------

March 1996                                                             Page 43

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table C. Type Entry Code 63 (Originating Exchange CI Overflow Record)

----------------------------------------------------
                                 AMA      AMA Char.
Information                      Chars.   Position
----------------------------------------------------
Start of entry character "V"     1        1
----------------------------------------------------
Type Entry code 63               2        2,3
----------------------------------------------------
Time                             8        4-11
----------------------------------------------------
IC/INC Information:
  Prefix                         4        12-15
  Overflow peg count             5        16-20
                               ---------------------
  Prefix                         4        21-24
  Overflow peg count             5        25-29
                               ---------------------
  Prefix                         4        30-33
  Overflow peg count             5        34-38
----------------------------------------------------
  Prefix                         4        39-42
  Overflow peg count             5        43-47
----------------------------------------------------

Page 44                                                             March 1996

==============================================================================

AT&T Practices                          AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table D. Type Entry Code 70 (SCF, SCR, AR, DA, COT, SASCF, TSSCF, SLE I, and
         Name/Number Privacy Access Records)

------------------------------------------------------------------------------
                                                           Data    AMA Char.
Information                                                Group   Position
------------------------------------------------------------------------------
Start of entry character "V"                               A1      1
------------------------------------------------------------------------------
Type entry code 70                                         A1      2, 3
------------------------------------------------------------------------------
Information digits                                         A2      4-5
------------------------------------------------------------------------------
Service feature code                                       A2      6-7
  LASS service feature options are:
    32 = AC delayed processing after reactivation
    33 = AR delayed processing after reactiveation
    34 = AC busy ringback after reactivation
    35 = AR busy ringback after reactivation
    36 = AC timeout after reactivation
    37 = AR timeout after reactivation
    38 = AC deactivation after reactivation
    39 = AR deactivation after reactivation
    52 = TSSCF (Total Separation SCF)
    60 = AC immediate processing
    61 = AR immediate processing
    62 = AC delayed processing
    63 = AR delayed processing
    64 = AC busy ringback
    65 = AR busy ringback
    66 = AC time-out
    67 = AR time-out
    68 = AC deactivation
    69 = AR deactivation
    70 = COT activation
    71 = SCF
    72 = SCR
    73 = DA
    74 = SLE daily continuation I
    75 = orig.end per call privacy
    76 = SASCF (Single Activation SCF)
    85 = NNP or NNDA Dialed
    86 = NAP toggle Dialed
    95 = Two-Level AR/AC
------------------------------------------------------------------------------
NCD                                                                8
------------------------------------------------------------------------------
Activation time (hour, second, tenth of second)            A3      9-15
------------------------------------------------------------------------------

March 1996                                                             Page 45

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table D. Type Entry Code 70 (SCF, SCR, AR, DA, COT, SASCF, TSSCF, SLE I, and
         Name/Number Privacy Access Records) (Contd)

------------------------------------------------------------------------------
                                                           Data    AMA Char.
Information                                                Group   Position
------------------------------------------------------------------------------
Billing number                                             B2      16-22
------------------------------------------------------------------------------
Deactivation time                                          C       23-30
------------------------------------------------------------------------------
Far-end DN                                                 D       31-40
------------------------------------------------------------------------------
Date                                                       I5      41-44
------------------------------------------------------------------------------
LASS Function                                              I21     45-46
  Options are:
    000-N/A
    001-active
    002-not active
    003-delete
    004-create
------------------------------------------------------------------------------
Feature Status                                             I22     47-49
  Options are:
    000-N/A
    001-SCF active
    002-SCR active
    003-SCF and SCR active
    004-DA active
    005-SCF and DA active
    006-SCR and DA active
    007-SCF, SCR, and DA active
    010-SASCF active
    012-SASCF and SCR active
    014-SASCF and DA active
    016-SASCF, SCR, and DA active
    020-TSSCF active
    022-TSSCF and SCR active
    024-TSSCF and DA active
    026-TSSCF, SCR, and DA active
------------------------------------------------------------------------------
Screen list size for SCF                                   I23     50-51
------------------------------------------------------------------------------
Screen list size for SCR                                   I24     52-53
------------------------------------------------------------------------------
Screen list size for DA                                    I25     54-55
------------------------------------------------------------------------------
Billing NPA (conditional)                                  J       56-58
------------------------------------------------------------------------------
NCD                                                                59-60
------------------------------------------------------------------------------

Page 46                                                             March 1996

==============================================================================

AT&T Practices                          AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table E. Type Entry Code 73 (Customer Changeable Primary-LATA Carrier)

------------------------------------------------------------------------------
                                                          AMA      AMA Char.
Information                                               Chars.   Position
------------------------------------------------------------------------------
Start of entry character "V"                              1        1
------------------------------------------------------------------------------
Type entry code 73                                        2        2-3
------------------------------------------------------------------------------
NPA                                                       3        4-6
------------------------------------------------------------------------------
Billing number (NXX-XXXX)                                 7        7-13
------------------------------------------------------------------------------
PIC change date (year, month, day)                        5        14-18
------------------------------------------------------------------------------
PIC change time (hour, minute,                            7        19-25
second, tenth of second)
------------------------------------------------------------------------------
Prior (old) PIC                                           3        26-28
------------------------------------------------------------------------------
New PIC                                                   3        29-31
------------------------------------------------------------------------------
Origination of PIC change:                                1        32
  0-Customer
  1-Telephone company
------------------------------------------------------------------------------
Verify or change:                                         1        33
  0-Verify
  1-Change
------------------------------------------------------------------------------
Charge or no charge:                                      1        34
  0-No charge
  1-Charge
------------------------------------------------------------------------------
NCD (noncheck dummy)                                      1        35
------------------------------------------------------------------------------

March 1996                                                             Page 47

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table F. Type Entry Code 76 (SCA, CAR, and SLE II Records)

------------------------------------------------------------------------------
                                                           Data    AMA Char.
Information                                                Group   Position
------------------------------------------------------------------------------
Start of entry character "V"                               A1      1
------------------------------------------------------------------------------
Type entry code 76                                         A1      2, 3
------------------------------------------------------------------------------
Information digits                                         A2      4-5
------------------------------------------------------------------------------
Service feature code                                       A2      6-7
  LASS service feature codes:
    53 = SLE daily continuation II
    98 = SCA (Selective Call Acceptance
    99 = CAR (Computer Access Restriction
------------------------------------------------------------------------------
NCD                                                                B
------------------------------------------------------------------------------
Activation time (hour, second, tenth of second)            A3      9-15
------------------------------------------------------------------------------
Billing number                                             B2      16-22
------------------------------------------------------------------------------
Deactivation                                               C       23-30
------------------------------------------------------------------------------
Far-end DN                                                 D       31-40
------------------------------------------------------------------------------
Date                                                       I5      41-44
------------------------------------------------------------------------------
LASS function                                              I21     45-46
  Options are:
    000-N/A
    001-active
    002-not active
    003-delete
    004-create
------------------------------------------------------------------------------
Feature status option II                                   I33     47-49
  Options are:
    000-N/A
    001-SCA active
    002-CAR active
------------------------------------------------------------------------------
Screen list size for SCA                                   I34     50-51
------------------------------------------------------------------------------
Screen list size for CAR                                   I35     52-53
------------------------------------------------------------------------------
                                                           I36     54-55
                                                          --------------------
                                                           I37     56-57
                                                          --------------------
Screen list size reserved                                  I38     58-59
                                                          --------------------
                                                           I39     60-61
                                                          --------------------
                                                           I40     62-63
------------------------------------------------------------------------------
Billing NPA (conditional)                                  J       64-66
------------------------------------------------------------------------------
NCD                                                                67-70
------------------------------------------------------------------------------


Page 48                                                             March 1996

==============================================================================

AT&T Practices                          AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table G. Type Entry Code 85 (CSR Extension Number Change)

------------------------------------------------------------------------------
                                                          AMA      AMA Char.
Information                                               Chars.   Position
------------------------------------------------------------------------------
Start of entry character "V"                               1       1
------------------------------------------------------------------------------
Type entry code 85                                         2       2, 3
------------------------------------------------------------------------------
NCD (noncheck dummy) character                             1       4
------------------------------------------------------------------------------
NPA                                                        3       5-7
------------------------------------------------------------------------------
Billing number (NXX-XXXX)                                  7       8-14
------------------------------------------------------------------------------
Date:
  Last digit of year                                       1       15
  Month                                                    2       16, 17
  Day                                                      2       18, 19
------------------------------------------------------------------------------
Time (hour, minute, second, tenth of second                7       20-26
------------------------------------------------------------------------------
Extension number changed ("old"                            5       27-31
extension number)
------------------------------------------------------------------------------
Extension number changed to                                5       32-36
("moved to" extension number)
------------------------------------------------------------------------------


March 1996                                                             Page 49

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table H. Type Entry Code 86 (Station Feature Assignment Change)

------------------------------------------------------------------------------
                                                          AMA      AMA Char.
Information                                               Chars.   Position
------------------------------------------------------------------------------
Start of entry character "V"                               1       1
------------------------------------------------------------------------------
Type entry code 86                                         2       2, 3
------------------------------------------------------------------------------
NCD (noncheck dummy) character                             1       4
------------------------------------------------------------------------------
NPA                                                        3       5-7
------------------------------------------------------------------------------
Billing number (NXX-XXXX)                                  7       8-14
------------------------------------------------------------------------------
Date:
  Last digit of year                                       1       15
  Month                                                    2       16, 17
  Day                                                      2       18, 19
------------------------------------------------------------------------------
Time (hour, minute, second, tenth of second)               7       20-26
------------------------------------------------------------------------------
Extension number of station with                           5       27-31
feature changes
------------------------------------------------------------------------------
Features changed:
  Added                                                    9       32-40
  Deleted                                                  9       41-49
  (See Table I)
------------------------------------------------------------------------------
Entry extender character "Y"                               1       50
(1AE8A and later generic programs)
     or
NCD (last character for record in 1AE7)
------------------------------------------------------------------------------
Features changed:
  Added                                                    16      51-66
  Deleted                                                  16      67-82
  (1AE8A and later generic
  programs, see Table J
------------------------------------------------------------------------------
NCD Characters                                             3       83-85
------------------------------------------------------------------------------


Page 50                                                             March 1996

==============================================================================

AT&T Practices                          AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table I. Nine-Character Field for V86 and V88 Records

------------------------------------------------------------------------------
Char.   Value   Features
------------------------------------------------------------------------------
1       0       Neither ACT, ACRG, nor FRL
        1       ACRG (Access Code Restriction Group)
        2       FRL (Facility Restriction Level)
        3       ACRG and FRL
        4       ACT (Activate Inactive Station)
        5       ACT and ACRG
        6       ACT and FRL
        7       ACT, ACRG, and FRL
        8       Not assigned
        9       Not assigned
------------------------------------------------------------------------------
2       0       Neither CFN, CPU, nor INACT
        1       CPU (Call Pickup)
        2       INACT (Deactivate Station)
        3       CPU and INACT
        4       CFN (Call Forwarding Number)
        5       CFN and CPU
        6       CFN and INACT
        7       CFN, CPU, and INACT
        8       Not assigned
        9       Not assigned
------------------------------------------------------------------------------
3       0       Neither CFBL, HUNT, nor DCPU
        1       HUNT
        2       DCPU (Directed Call Pickup With Barge-In)
        3       HUNT and DCPU
        4       CFBL (Call Forwarding Busy Line)
        5       CFBL and HUNT
        6       CFBL and DCPU
        7       CFBL, HUNT, and DCPU
        8       Not assigned
        9       Not assigned
------------------------------------------------------------------------------
4       0       Neither CFUS, CFDA, nor RCYC
        1       CFDA (Call Forwarding Don't Answer)
        2       RCYC (Ringing Cycles for CFDA)
        3       CFDA and RCYC
        4       CFUS (Call Forwarding Unrestricted Source)
        5       CFUS and CFDA
        6       CFUS and RCYC
        7       CFUS, CFDA, and RCYC
        8       Not assigned
        9       Not assigned
------------------------------------------------------------------------------


March 1996                                                             Page 51

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table I. Nine-Character Field for V86 and V88 Records (Contd)

------------------------------------------------------------------------------
Char.   Value   Features
------------------------------------------------------------------------------
5       0       Neither CHD, CFV, nor SC
        1       CFV (Call Forwarding Variable)
        2       SC (1-Digit Speed Calling)
        3       CFV and SC
        4       CHD (Call Hold)
        5       CHD and CFV
        6       CHD and SC
        7       CHD, CFV, and SC
        8       Not assigned
        9       Not assigned
------------------------------------------------------------------------------
6       0       Neither INEQ, CWT, nor CWO
        1       CWT (Call Waiting Terminating)
        2       CWO (Call Waiting Originating)
        3       CWT and CWO
        4       INEQ (Inhibit ETS Queueing
        5       INEQ and CWT
        6       INEQ and CWO
        7       INEQ, CWT, and CWO
        8       Not assigned
        9       Not assigned
------------------------------------------------------------------------------
7       0       Neither ACBC, CSR, nor DCPN
        1       ACBC (Automatic Callback Calling)
        2       CSR (Centrex Station Rearrangements)
        3       ACBC and CSR
        4       DCPN (Directed Call Pickup Nonbarge-In)
        5       ACBC and DCPN
        6       CSR and DCPN
        7       ACBC, CSR, and DCPN
        8       Not assigned
        9       Not assigned
------------------------------------------------------------------------------
8       0       Neither DCN, ACC, nor PFX
        1       DCN (Direct Connect Number)
        2       ACC (DCN access code)
        3       DCN and ACC
        4       PFX (DCN prefix)
        5       DCN and PFX
        6       ACC and PFX
        7       DCN, ACC, and PFX
        8       Not assigned
        9       Not assigned
------------------------------------------------------------------------------


Page 52                                                             March 1996

==============================================================================

AT&T Practices                          AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table I. Nine-Character Field for V86 and V88 Records (Contd)

------------------------------------------------------------------------------
Char.   Value   Features
------------------------------------------------------------------------------
9       0       Neither IDDD DCN, SC2, nor DCW
        1       IDDD (International Direct Distance
                Dialing DCN)
        2       SC2 (2-Digit Speed Calling)
        3       IDDD DCN and SC2
        4       DCW (Dial Call Waiting)
        5       IDDD DCN and DCW
        6       SC2 and DCW
        7       IDDD DCN, SC2, and DCW
        8       Not assigned
        9       Not assigned
------------------------------------------------------------------------------


March 1996                                                             Page 53

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table J. Sixteen-Character Feature Field for V86 and V88 Records

------------------------------------------------------------------------------
Char.   Value   Features
------------------------------------------------------------------------------
1       0       Neither SCT, VACT, nor VDP
        1       VDP (VDP Voice/Data Protection)
        2       VACT (VDP Deactivate Indicator)
        3       VDP and VACT
        4       STC (Station Control)
        5       STC and VDP
        6       STC and VACT
        7       STC, VACT, and VDP
        8       Not assigned
        9       Not assigned
------------------------------------------------------------------------------
2       0       Neither PFEAT, PBN, nor CLINE
        1       CLINE (Centrex Electronic Key Line)
        2       PBN ( Port Billing Number)
        3       PBN and CLINE
        4       PFEAT (Port Features)
        5       PFEAT and CLINE
        6       PFEAT and PBN
        7       PFEAT, PBN, and CLINE
        8       Not assigned
        9       Not assigned
------------------------------------------------------------------------------
3       0       Neither CPORT, GID, nor CEKSN
        1       CEKSN (Centrex Electronic Key System Number)
        2       GID (Group Identifier)
        3       GID and CEKSN
        4       CPORT (Centrex Electronic Key Port)
        5       CPORT and CEKSN
        6       CPORT and GID
        7       CPORT, GID, and CEKSN
        8       Not assigned
        9       Not assigned
------------------------------------------------------------------------------
4       0       Neither DAUS, BLUS, nor CFDA1
        1       CFDA1 (Separate Remote Station TN for CFDA)
        2       BLUS (Busy Line Unrestricted Source for CFBL1)
        3       CFDA1 and BLUS
        4       DAUS (Don't Answer Unrestricted Source for CFDA1)
        5       DAUS and CFDA1
        6       DAUS and BLUS
        7       DAUS, BLUS, and CFDA1
        8       Not assigned
        9       Not assigned
------------------------------------------------------------------------------


Page 54                                                             March 1996

==============================================================================

AT&T Practices                          AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table J. Sixteen-Character Feature Field for V86 and V88 Records (Contd)

------------------------------------------------------------------------------
Char.   Value   Features
------------------------------------------------------------------------------
5       0       Neither CFBL1, MSAMA, nor VMWI
        1       VMWI (Visual Message Waiting Indicator)
        2       MSAMA (Message Service AMA Type)
        3       VMWI and MSAMA
        4       CFBL1 (Separate Remote Station TN for CFBL)
        5       CFBL1 and VMWI
        6       CFBL1 and MSAMA
        7       CFBL1, MSAMA, and VMWI
        8       Not assigned
        9       Not assigned
------------------------------------------------------------------------------
6       0       Neither MWI, MDC, nor CLASS
        1       CLASS (Class of VDP features)
        2       MDC (Message Desk Center)
        3       CLASS and MDC
        4       MWI (Message Waiting Indicator)
        5       MWI and CLASS
        6       MWI and MDC
        7       MWI, MDC, and CLASS
        8       Not assigned
        9       Not assigned
------------------------------------------------------------------------------
7       0       Neither ASPI, ASPO, ASPA, nor ASP assigned
        1       ASPI incoming
        2       ASPO outgoing
        3       ASPI and ASPO
        4       ASPA access
        5       ASPA and ASPI
        6       ASP
        7-9     Not assigned
------------------------------------------------------------------------------
8       0       Neither CFN XXX, PFX, or CWC
        1       CFN XXX (CFN with Carrier Specified)
        2       CFN PFX (CFN with Prefix)
        3       CFN XXX and CFN PFX
        4       CWC CFN (CWC Call Forwarding)
        5-9     Not assigned
------------------------------------------------------------------------------


March 1996                                                             Page 55

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table J. Sixteen-Character Feature Field for V86 and V88 Records (Contd)

------------------------------------------------------------------------------
Char.   Value   Features
------------------------------------------------------------------------------
9       0       Neither CFBL XXX, PFX, or CWC
        1       CFBL XXX (CFBL with Carrier Specified)
        2       CFBL PFX (CFBL with Prefix)
        3       CFBL XXX and CFBL PFX
        4       CWC CFBL (CWC Busy Line)
        5-9     Not assigned
------------------------------------------------------------------------------
10      0       Neither CFDA XXX, PFX, or CWC
        1       CFDA XXX (CFDA with Carrier Specified)
        2       CFDA PFX (CFDA with Prefix)
        3       CFDA XXX and CFDA PFX
        4       CWC CFDA (CWC Don't Answer)
        5-9     Not assigned
------------------------------------------------------------------------------
11      0       No SLS (Straight Line Set)/No RAS (Remote Access Service)
        1       SLS
        2       RAS
        3       RAS and SLS
        4-9     Not assigned
------------------------------------------------------------------------------
12      0       No features assigned for this character
        1-9     Not assigned
------------------------------------------------------------------------------
13      0       No features assigned for this character
        1-9     Not assigned
------------------------------------------------------------------------------
14      0       No features assigned for this character
        1-9     Not assigned
------------------------------------------------------------------------------
15      0       No SMWI (Simultaneous Message Waiting Indicator)
        1       SMWI
        2-9     Not assigned
------------------------------------------------------------------------------
16      0       Neither UCR, INDACW, or UCRD
        1       UCR (Unidentified Caller Rejection)
        2       INDACW (Inhibit CFDA After CW)
        3       UCR + INDACW
        4       UCRD (UCR Deactivation)
        5       UCRD + UCR
        6       UCRD + INDACW
        7       UCRD + UCR + INDACW
        8-9     Not assigned
------------------------------------------------------------------------------


Page 56                                                             March 1996

==============================================================================

AT&T Practices                          AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table K. Type Entry Code 87 (Station Verification)

------------------------------------------------------------------------------
                                                           AMA      AMA Char.
Information                                                Chars.   Position
------------------------------------------------------------------------------
Start of entry character "V"                               1        1
------------------------------------------------------------------------------
Type entry code 87                                         2        2, 3
------------------------------------------------------------------------------
NCD (noncheck dummy) character                             1        4
------------------------------------------------------------------------------
NPA                                                        3        5-7
------------------------------------------------------------------------------
Billing number (NXX-XXXX)                                  7        8-14
------------------------------------------------------------------------------
Date:
  Last digit of year                                       1        15
  Month                                                    2        16, 17
  Day                                                      2        18, 19
------------------------------------------------------------------------------
Time (hour, minute, second, tenth of second)               7        20-26
------------------------------------------------------------------------------
Extension number of first station verified                 5        27-31
------------------------------------------------------------------------------
Number of stations verified                                5        32-36
------------------------------------------------------------------------------


March 1996                                                             Page 57

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table L. Type Entry Code 88 (Feature Verification)

------------------------------------------------------------------------------
                                                           AMA      AMA Char.
Information                                                Chars.   Position
------------------------------------------------------------------------------
Start of entry character "V"                               1        1
------------------------------------------------------------------------------
Type entry code 88                                         2        2, 3
------------------------------------------------------------------------------
NCD (noncheck dummy) character                             1        4
------------------------------------------------------------------------------
NPA                                                        3        5-7
------------------------------------------------------------------------------
Billing number (NXX-XXXX)                                  7        8-14
------------------------------------------------------------------------------
Date:
  Last digit of year                                       1        15
  Month                                                    2        16, 17
  Day                                                      2        18, 19
------------------------------------------------------------------------------
Time (hour, minute, second, tenth of second)               7        20-26
------------------------------------------------------------------------------
Features searched for (See Table I)                        9        27-35
------------------------------------------------------------------------------
NCD character                                              1        36
------------------------------------------------------------------------------
Number of stations searched                                5        37-41
------------------------------------------------------------------------------
NCD character                                              1        42
------------------------------------------------------------------------------
Number of stations found                                   5        43-47
------------------------------------------------------------------------------
Entry extender character "Y"                               1        48
(1AE8A and later generic programs)
------------------------------------------------------------------------------
Features searched for (See Table J) (1AE8A and later)      16       49-64
------------------------------------------------------------------------------
NCD character                                              1        65
------------------------------------------------------------------------------


Page 58                                                             March 1996

==============================================================================

AT&T Practices                          AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table M. VZ08 - 800 Service Overflow Counts

------------------------------------------------------------------------------
                                                           AMA      AMA Char.
Information                                                Chars.   Position
------------------------------------------------------------------------------
Statistical Record Characters "VZ"                         2        1, 2
------------------------------------------------------------------------------
Record Identifier Characters "08"                          2        3, 4
------------------------------------------------------------------------------
NCD (noncheck dummy) character                             1        5
------------------------------------------------------------------------------
Time (hour and minute)                                     4        6-9
------------------------------------------------------------------------------
NCD character                                              1        10
------------------------------------------------------------------------------
Customer Billing Number                                    7        11-17
Overflow Count                                             5        18-22
------------------------------------------------------------------------------
Customer Billing Number                                    7        23-29
Overflow Count                                             5        30-34
------------------------------------------------------------------------------
Customer Billing Number                                    7        35-41
Overflow Count                                             5        42-46
------------------------------------------------------------------------------
Customer Billing Number                                    7        47-53
Overflow Count                                             5        54-58
------------------------------------------------------------------------------
Customer Billing Number                                    7        59-65
Overflow Count                                             5        66-70
------------------------------------------------------------------------------


March 1996                                                             Page 59

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table N. VZ12 - Centrex/ESSX-1 Intercom and 3-Port Facilities Counts

------------------------------------------------------------------------------
                                                           AMA      AMA Char.
Information                                                Chars.   Position
------------------------------------------------------------------------------
Statistical Record Characters "VZ"                         2        1, 2
------------------------------------------------------------------------------
Record Identifier Characters "12"                          2        3, 4
------------------------------------------------------------------------------
NCD (noncheck dummy) character                             1        5
------------------------------------------------------------------------------
Time (hour and minute)                                     4        6-9
------------------------------------------------------------------------------
NCD character                                              1        10
------------------------------------------------------------------------------
LDN (listed directory number) (NPA filled with NCDs)       10       11-20
------------------------------------------------------------------------------
Intercom Counts:
  Attempts                                                 5        21-25
  Usage                                                    5        26-30
  Overflow                                                 5        31-35
  Facilities                                               5        36-40
------------------------------------------------------------------------------
3-Port Counts:
  Attempts                                                 5        41-45
  Usage                                                    5        46-50
  Overflow                                                 5        51-55
  Facilities                                               5        56-60
------------------------------------------------------------------------------
Total Overflow Counts                                      5        61-65
------------------------------------------------------------------------------


Page 60                                                             March 1996

==============================================================================

AT&T Practices                          AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table O. VZ12 - SMDR Format 1 Data (No ETS Account Code or WATS Reseller
         Authorization Code)

------------------------------------------------------------------------------
                                                                       AMA
Information                                                            Chars.
------------------------------------------------------------------------------
Statistical Record Characters "VZ"                                     2
Record Identifier Characters "12"                                      2
Call Success/Failure Code                                              1
Service Feature Code                                                   1
Automatic Route Selection Pattern                                      1
Facility Restriction Level                                             1
Outgoing Facility Member Number (Contd)                                2
ETS Customer Identification (064-127)                                  3
Calling Directory Number                                               7
Called Directory Number                                                10
------------------------------------------------------------------------------
Answer Time:
  Hours                                                                2
  Minutes                                                              2
  Seconds                                                              2
  Tenths of Seconds                                                    1
------------------------------------------------------------------------------
Time Change Indicator                                                  1
Number of Midnights the Call Lasted                                    1
------------------------------------------------------------------------------
Disconnect Time:
  Hours                                                                2
  Minutes                                                              2
  Seconds                                                              2
  Tenths of Seconds                                                    1
------------------------------------------------------------------------------
Authorization Code (NCDs, if none)                                     6
Incoming Facility Group Number                                         3
Incoming Facility Member Number                                        3
NCD (Noncheck dummy) Character                                         2
Outgoing Facility Group Number                                         3
Outgoing Facility Member Number                                        1
Call Record Type "1"                                                   1
------------------------------------------------------------------------------


March 1996                                                             Page 61

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Tabel P. VZ12 - SMDR Format 1 Data (ETS Account Code)

------------------------------------------------------------------------------
                                                                       AMA
Information                                                            Chars.
------------------------------------------------------------------------------
Statistical Record Characters "VZ"                                     2
Record Identifier Characters "12"                                      2
Call Success/Failure Code                                              1
Service Feature Code                                                   1
Automatic Route Selection Pattern                                      1
Facility Restriction Level                                             1
Outgoing Facility Member Number (Contd)                                2
ETS Customer Identification (064-127)                                  3
Calling Directory Number                                               7
Called Directory Number                                                10
------------------------------------------------------------------------------
Answer Time:
  Hours                                                                2
  Minutes                                                              2
  Seconds                                                              2
  Tenths of Seconds                                                    1
------------------------------------------------------------------------------
Time Change Indicator                                                  1
Number of Midnights the Call Lasted                                    1
------------------------------------------------------------------------------
Disconnect Time:
  Hours                                                                2
  Minutes                                                              2
  Seconds                                                              2
  Tenths of Seconds                                                    1
------------------------------------------------------------------------------
Authorization Code                                                     6
ETS Optional Account Code                                              8
Outgoing Facility Group Number                                         3
Outgoing Facility Member Number                                        1
Call Record Type "7"                                                   1
------------------------------------------------------------------------------


Page 62                                                             March 1996

==============================================================================

AT&T Practices                          AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table Q. VZ12 - SMDR Format 1 Data (WATS Reseller Authorization Code)

------------------------------------------------------------------------------
                                                                       AMA
Information                                                            Chars.
------------------------------------------------------------------------------
Statistical Record Characters "VZ"                                     2
Record Identifier Characters "12"                                      2
Call Success/Failure Code                                              1
Service Feature Code                                                   1
Automatic Route Selection Pattern                                      1
Facility Restriction Level                                             1
Outgoing Facility Member Number (Contd)                                2
ETS Customer Identification (064-127)                                  3
Calling Directory Number                                               7
Called Directory Number                                                10
------------------------------------------------------------------------------
Answer Time:
  Hours                                                                2
  Minutes                                                              2
  Seconds                                                              2
  Tenths of Seconds                                                    1
------------------------------------------------------------------------------
Time Change Indicator                                                  1
Number of Midnights the Call Lasted                                    1
------------------------------------------------------------------------------
Disconnect Time:
  Hours                                                                2
  Minutes                                                              2
  Seconds                                                              2
  Tenths of Seconds                                                    1
------------------------------------------------------------------------------
Authorization Code                                                     6
Authorization Code Prefix                                              2
------------------------------------------------------------------------------
Dialing Completion Time:
  Minutes                                                              1
  Seconds                                                              2
------------------------------------------------------------------------------
Outpulsing Completion Time - Minutes                                   1
Outpulsing Completion Time - Seconds                                   2
------------------------------------------------------------------------------
Outgoing Facility:
  Group Number                                                         3
  Member Number                                                        1
------------------------------------------------------------------------------
Call Record Type "8"                                                   1
------------------------------------------------------------------------------


March 1996                                                             Page 63

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table R. VZ12 - SMDR Format 2 Data

------------------------------------------------------------------------------
                                                                       AMA
Information                                                            Chars.
------------------------------------------------------------------------------
Statistical Record Characters "VZ"                                     2
Record Identifier Characters "12"                                      2
NCD (Noncheck Dummy) Character                                         1
Call Success/Failure Code                                              1
Service Feature Code                                                   1
------------------------------------------------------------------------------
End-of-Dial Time:
  Hours                                                                2
  Minutes                                                              1
------------------------------------------------------------------------------
ETS Customer Identification (064-127)                                  3
Centrex LDN (listed directory number)                                  7
------------------------------------------------------------------------------
End-of-Dial Time:
  Minutes (Contd)                                                      1
  Seconds                                                              2
  Tenths of Seconds                                                    1
------------------------------------------------------------------------------
Time Change Indicator                                                  1
------------------------------------------------------------------------------
Answer Time:
  Hours                                                                2
  Minutes                                                              2
  Seconds                                                              2
  Tenths of Seconds                                                    1
------------------------------------------------------------------------------
Automatic Route Selection Pattern                                      1
Outgoing Facility Group Number                                         3
Outgoing Facility Member Number                                        3
Calling Directory Number                                               10
Facility Restriction Level                                             1
Incoming Facility Group Number                                         3
Incoming Facility Member Number                                        3
NCD Characters                                                         8
Call Record Type "2"                                                   1
------------------------------------------------------------------------------


Page 64                                                             March 1996

==============================================================================

AT&T Practices                          AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table S. VZ12 - SMDR Format 3 Data

------------------------------------------------------------------------------
                                                                       AMA
Information                                                            Chars.
------------------------------------------------------------------------------
Statistical Record Characters "VZ"                                     2
Record Identifier Characters "12"                                      2
NCD (Noncheck Dummy) Character                                         3
------------------------------------------------------------------------------
Old Time - Hours                                                       2
Old Time - Minutes                                                     1
------------------------------------------------------------------------------
ETS Customer Identification (064-127)                                  3
Centrex LDN (listed directory number)                                  7
------------------------------------------------------------------------------
Old Time
  Minutes (Contd)                                                      1
  Seconds                                                              2
  Tenths of Seconds                                                    1
------------------------------------------------------------------------------
NCD Character                                                          1
------------------------------------------------------------------------------
New Time
  Hours                                                                2
  Minutes                                                              2
  Seconds                                                              2
  Tenths of Seconds                                                    1
------------------------------------------------------------------------------
New Date:
  Month                                                                2
  Day                                                                  2
------------------------------------------------------------------------------
NCD Characters                                                         28
Call Record Type "3"                                                   1
------------------------------------------------------------------------------


March 1996                                                             Page 65

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table T. VZ12 - SMDR Format 4 Data

------------------------------------------------------------------------------
                                                                       AMA
Information                                                            Chars.
------------------------------------------------------------------------------
Statistical Record Characters "VZ"                                     2
Record Identifier Characters "12"                                      2
NCD (Noncheck Dummy) Character                                         1
Office Identification (From A8NPA)                                     5
ETS Customer Identification (064-127)                                  3
Centrex LDN (listed directory number)                                  7
Office Identification (Contd)                                          1
------------------------------------------------------------------------------
Current Time:
  Hours                                                                2
  Minutes                                                              2
  Seconds                                                              2
  Tenths of Seconds                                                    1
------------------------------------------------------------------------------
Current Date:
  Month                                                                2
  Day                                                                  2
------------------------------------------------------------------------------
Lost Record Count                                                      4
NCD Characters                                                         28
Call Record Type "4"                                                   1
------------------------------------------------------------------------------


Page 66                                                             March 1996

==============================================================================

AT&T Practices                          AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table U. VZ12 - XMDR Format 5/6 Data

------------------------------------------------------------------------------
                                                                       AMA
Information                                                            Chars.
------------------------------------------------------------------------------
Statistical Record Characters "VZ"                                     2
Record Identifier Characters "12"                                      2
Call Success/Failure Code                                              1
Service Feature Code                                                   1
Outgoing Facility Group Number*                                        3
Outgoing Facility Member Number*                                       1
ETS Customer Identification (064-127)                                  3
Calling Directory Number                                               7
Called Directory Number                                                12
Time Change Indicator                                                  1
------------------------------------------------------------------------------
Answer Time:
  Hours                                                                2
  Minutes                                                              2
  Seconds                                                              2
  Tenths of Seconds                                                    1
------------------------------------------------------------------------------
Number of Midnights the Call Lasted                                    1
------------------------------------------------------------------------------
Disconnect Time:
  Hours                                                                2
  Minutes                                                              2
  Seconds                                                              2
  Tenths of Seconds                                                    1
------------------------------------------------------------------------------
Incoming Facility Group Number                                         3
Incoming Facility Member Number                                        3
Outgoing Facility Member Number (Contd)*                               2
CDAR (Customer Dialed Account Recording) Optional Account Code         8
Call Record Type "5"/"6"                                               1
------------------------------------------------------------------------------

* These fields contain the access code digits, padded on the right with NCDs,
  for XMDR format 6 records if the customer chooses the XMDRPD option.


March 1996                                                             Page 67

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table V. VZ12 - XMDR Format 5/6 Data [WATS Reseller Authorization Code (IDDD)]

------------------------------------------------------------------------------
                                                                       AMA
Information                                                            Chars.
------------------------------------------------------------------------------
Statistical Record Characters "VZ"                                     2
Record Identifier Characters "12"                                      2
Call Succes/Failure Code                                               1
Service Feature Code                                                   1
Outgoing Facility Group Number                                         3
Outgoing Facility Member Number                                        1
ETS Customer Identification (064-127)                                  3
Calling Directory Number                                               7
Called Directory Number                                                16
Time Change Indicator                                                  1
------------------------------------------------------------------------------
Answer Time:
  Hours                                                                2
  Minutes                                                              2
  Seconds                                                              2
  Tenths of Seconds                                                    1
------------------------------------------------------------------------------
Number of Midnights the Call Lasted                                    1
------------------------------------------------------------------------------
Disconnect Time:
  Hours                                                                2
  Minutes                                                              2
  Seconds                                                              2
  Tenths of Seconds                                                    1
------------------------------------------------------------------------------
Incoming Facility Group Number                                         3
Incoming Facility Member Number                                        3
Outgoing Facility Member Number                                        2
Authorization Code                                                     6
Authorization Code Prefix                                              2
Call Record Type "9"
------------------------------------------------------------------------------


Page 68                                                             March 1996

==============================================================================

AT&T Practices                          AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table W. VZ12 - XMDR Format 5/6 Data [WATS Reseller Authorization Code (Non-
                IDDS)]

------------------------------------------------------------------------------
                                                                       AMA
Information                                                            Chars.
------------------------------------------------------------------------------
Statistical Record Characters "VZ"                                     2
Record Identifier Characters "12"                                      2
Call Succes/Failure Code                                               1
Service Feature Code                                                   1
Outgoing Facility Group Number                                         3
Outgoing Facility Member Number                                        1
ETS Customer Identification (064-127)                                  3
Calling Directory Number                                               7
Called Directory Number                                                16
Time Change Indicator                                                  1
------------------------------------------------------------------------------
Answer Time:
  Hours                                                                2
  Minutes                                                              2
  Seconds                                                              2
  Tenths of Seconds                                                    1
------------------------------------------------------------------------------
Number of Midnights the Call Lasted                                    1
------------------------------------------------------------------------------
Disconnect Time:
  Hours                                                                2
  Minutes                                                              2
  Seconds                                                              2
  Tenths of Seconds                                                    1
------------------------------------------------------------------------------
Incoming Facility Group Number                                         3
Incoming Facility Member Number                                        3
Outgoing Facility Member Number                                        2
Authorization Code                                                     6
Authorization Code Prefix                                              2
Call Record Type "5"/"6"                                               1
------------------------------------------------------------------------------


March 1996                                                             Page 69

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table X. VZ18 - 800 Service Busy Counts

------------------------------------------------------------------------------
                                                           AMA      AMA Char.
Information                                                Chars.   Position
------------------------------------------------------------------------------
Statistical Record Characters "VZ"                         2        1, 2
------------------------------------------------------------------------------
Record Identifier Characters "18"                          2        3, 4
------------------------------------------------------------------------------
NCD (noncheck dummy) Character                             1        5
------------------------------------------------------------------------------
Time (hours and minutes)                                   4        6-9
------------------------------------------------------------------------------
NCD character                                              1        10
------------------------------------------------------------------------------
Customer Billing Number                                    7        11-17
End Office Busy Counts                                     5        18-22
Data Base Busy Counts                                      5        23-27
------------------------------------------------------------------------------
Customer Billing Number                                    7        28-34
End Office Busy Counts                                     5        35-39
Data Base Busy Counts                                      5        40-44
------------------------------------------------------------------------------
Customer Billing Number                                    7        45-51
End Office Busy Counts                                     5        52-56
Data Base Busy Counts                                      5        57-61
------------------------------------------------------------------------------
NCD (noncheck dummy) Characters                            4        62-65
------------------------------------------------------------------------------


Page 70                                                             March 1996

==============================================================================

AT&T Practices                          AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table Y. VZ22 - Message Service Counts

------------------------------------------------------------------------------
                                                           AMA      AMA Char.
Information                                                Chars.   Position
------------------------------------------------------------------------------
Statistical Record Characters "VZ"                         2        1, 2
------------------------------------------------------------------------------
Record Identifier Characters "22"                          2        3, 4
------------------------------------------------------------------------------
NCD character                                              1        5
------------------------------------------------------------------------------
Time (hours and minutes)                                   4        6-9
------------------------------------------------------------------------------
NCD character                                              1        10
------------------------------------------------------------------------------
NPA                                                        3        11-13
Customer Billing Number                                    7        14-20
Success Counts                                             5        21-25
Private Counts                                             5        26-30
Unavailable Counts                                         5        31-35
VDI (Voice/Data Interface)/IOP                             1        36
(I/O Processor) Indicator
------------------------------------------------------------------------------
NPA                                                        3        37-39
Customer Billing Number                                    7        40-46
Success Counts                                             5        47-51
Private Counts                                             5        52-56
Unavailable Counts                                         5        57-61
VDI/IOP                                                    1        62
------------------------------------------------------------------------------
NPA                                                        3        63-65
Customer Billing Number                                    7        66-72
Success Counts                                             5        73-77
Private Counts                                             5        78-82
Unavailable Counts                                         5        83-87
VDI/IOP                                                    1        88
------------------------------------------------------------------------------
NCD characters                                             4        62-55
                                                           2        89, 90
------------------------------------------------------------------------------


March 1996                                                             Page 71

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table Z. Format for BCLID (VZ30), ICLID (VZ31) or PPV (VZ32) Counts

------------------------------------------------------------------------------
                                                           AMA      AMA Char.
Information                                                Chars.   Position
------------------------------------------------------------------------------
Statistical Record Characters "VZ"                         2        1, 2
------------------------------------------------------------------------------
Record Identifier Characters "30", "31", or "32"           2        3, 4
------------------------------------------------------------------------------
NCD character                                              1        5
------------------------------------------------------------------------------
Time (hours and minutes)                                   4        6-9
------------------------------------------------------------------------------
NCD character                                              1        10
------------------------------------------------------------------------------
NPA                                                        3        11-13
Customer Billing Number                                    7        14-20
AC (count of available calling DNs                         5        21-25
sent to customer)
UPC (count of unavailable/private                          5        26-30
calling DN indicators sent to customer)
------------------------------------------------------------------------------
NPA                                                        3        31-33
Customer Billing Number                                    7        34-40
AC                                                         5        41-45
UPC                                                        5        46-50
------------------------------------------------------------------------------
NPA                                                        3        51-53
Customer Billing Number                                    7        54-60
AC                                                         5        61-65
UPC                                                        5        66-70
------------------------------------------------------------------------------

Note: ICLID = For PPV, the AC items are a count of orders transmitted to the
      I/O channel. The UPC items are a combined count of check digit
      mismatches and output buffer overflows.


Page 72                                                             March 1996

==============================================================================

AT&T Practices                          AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table AA. Format for CNAM Only (VZ33) Counts

------------------------------------------------------------------------------
                                                           AMA      AMA Char.
Information                                                Chars.   Position
------------------------------------------------------------------------------
Statistical Record Characters "VZ"                         2        1-2
------------------------------------------------------------------------------
Record Identifier Characters "33"                          2        3-4
------------------------------------------------------------------------------
NCD Character                                              1        5
------------------------------------------------------------------------------
Time (hours and minutes)                                   4        6-9
------------------------------------------------------------------------------
NCD Character                                              1        10
------------------------------------------------------------------------------
NPA                                                        3        11-13
------------------------------------------------------------------------------
Billing Number                                             7        14-20
------------------------------------------------------------------------------
Count of Names Sent                                        5        21-25
Count of Name Private/Unavailable                          5        26-30
------------------------------------------------------------------------------

Note: The count of Name Private/Unavailable is a combined count of Name
Private and Name Unavailable Sent.


March 1996                                                             Page 73

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Table AB. Format for CNAM and ICLID Combined (VZ34) Counts

------------------------------------------------------------------------------
                                                           AMA      AMA Char.
Information                                                Chars.   Position
------------------------------------------------------------------------------
Statistical Record Characters "VZ"                         2        1-2
------------------------------------------------------------------------------
Record Identifier Characters "34"                          2        3-4
------------------------------------------------------------------------------
NCD Character                                              1        5
------------------------------------------------------------------------------
Time (hours and minutes)                                   4        6-9
------------------------------------------------------------------------------
NCD Character                                              1        10
------------------------------------------------------------------------------
NPA                                                        3        11-13
------------------------------------------------------------------------------
Billing Number                                             7        14-20
------------------------------------------------------------------------------
Count of Name/Number Sent                                  5        21-25
Count of Priv/Unavail Name/Number                          5        26-30
Count of Name and Priv/Unavail Number Sent                 5        31-35
Count of Number and Priv/Unavail Number Sent               5        36-40
------------------------------------------------------------------------------

Note: The count of Private/Unavailable Name and Private/Unavailable Number is
      a combined count of Name Sent Private or Unavailable and Number Sent
      Private or Unavailable.


Page 74                                                             March 1996

==============================================================================

AT&T Practices                          AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------

Tabel AC. Format for CWD (VZ35) Counts

------------------------------------------------------------------------------
                                                           AMA      AMA Char.
Information                                                Chars.   Position
------------------------------------------------------------------------------
Statistical Record Characters "VZ"                         2        1-2
------------------------------------------------------------------------------
Record Identifier Characters "35"                          2        3-4
------------------------------------------------------------------------------
Pad Character "*"                                          1        5
------------------------------------------------------------------------------
Time (hours and minutes - HHMM)                            4        6-9
------------------------------------------------------------------------------
Pad Character "*"                                          1        10
------------------------------------------------------------------------------
NPA                                                        3        11-13
------------------------------------------------------------------------------
Customer Billing Number                                    7        14-20
------------------------------------------------------------------------------
Count of CWD Conference Option Usage                       5        21-25
------------------------------------------------------------------------------


March 1996                                                             Page 75

==============================================================================

AT&T 231-390-063, Appendix 1, Issue 14
------------------------------------------------------------------------------
Information                                                Chars.   Position
------------------------------------------------------------------------------
Start of entry character "V"                               1        1
------------------------------------------------------------------------------
Type entry code 67                                         2        2-3
------------------------------------------------------------------------------
Time                                                       8        4-11
------------------------------------------------------------------------------
IC/INC PREFIX ONE:
  Carrier Identifier                                       4        12-15
  Operator Data = 2                                        1           16
  Overflow Peg Count                                       5        17-21
------------------------------------------------------------------------------
IC/INC PREFIX TWO:
  Carrier Identifier                                       4        22-25
  Operator Data = 2                                        1           26
  Overflow Peg Count                                       5        27-31
------------------------------------------------------------------------------
IC/INC PREFIX THREE:
  Carrier Identifier                                       4        32-35
  Operator Data = 2                                        1           36
  Overflow Peg Count                                       5        37-41
------------------------------------------------------------------------------
IC/INC PREFIX FOUR:
  Carrier Identifier                                       4        42-45
  Operator Data = 2                                        1           46
  Overflow Peg Count                                       5        47-51
  NCDs                                                     4        52-55
------------------------------------------------------------------------------


Page 76                                                             March 1996

==============================================================================

FEEDBACK FORM

Document Title:  1A ESS Switch
                 Automatic Message Accounting
                 Feature Document

Document Number: AT&T 231-390-063, Appendix 1

Issue Number: 14

Issue Date: March 1996

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