ANI II DIGITS
ASSIGNMENTS
DIGIT PAIR DESCRIPTION
00 Plain Old Telephone Service (POTS) - non-coin service
requiring no special treatment
01 Multiparty line (more than 2) - ANI cannot be provided on
4 or 8 party lines. The presence of this "01" code will
cause an Operator Number Identification (ONI) function to
be performed at the distant location. The ONI feature
routes the call to a CAMA operator or to an Operator
Services System (OSS) for determination of the calling
number.
02 ANI Failure - the originating switching system indicates
(by the "02" code), to the receiving office that the
calling station has not been identified. If the receiving
switching system routes the call to a CAMA or Operator
Services System, the calling number may be verbally
obtained and manually recorded. If manual operator
identification is not available, the receiving switching
system (e.g., an interLATA carrier without operator
capabilities) may reject the call.
03-05 Unassigned
06 Station Level Rating - The "06" digit pair is used when
the customer has subscribed to a class of service in order
to be provided with real time billing information. For
example, hotel/motels, served by PBXs, receive detailed
billing information, including the calling party’s room
number. When the originating switching system does not
receive the detailed billing information, e.g., room
number, this "06" code allows the call to be routed to an
operator or operator services system to obtain complete
billing information. The rating and/or billing information
is then provided to the service subscriber. This code is
used only when the directory number (DN) is not
accompanied by an automatic room/account identification.
07 Special Operator Handling Required - calls generated from
stations that require further operator or Operator
Services System screening are accompanied by the "07"
code. The code is used to route the call to an operator or
Operator Services System for further screening and to
determine if the station has a denied-originating class of
service or special routing/billing procedures. If the call
is unauthorized, the calling party will be routed to a
standard intercept message.
08-09 Unassigned
10 Not assignable - conflict with 10X test code
11 Unassigned
12-19 Not assignable - conflict with international outpulsing
code
20 Automatic Identified Outward Dialing (AIOD) - without
AIOD, the billing number for a PBX is the same as the PBX
Directory Number (DN). With the AIOD feature, the
originating line number within the PBX is provided for
charging purposes. If the AIOD number is available when
ANI is transmitted, code "00" is sent. If not, the PBX DN
is sent with ANI code "20". In either case, the AIOD
number is included in the AMA record.
21-22 Unassigned
23 Coin or Non-Coin - on calls using database access, e.g.,
800, ANI II 23 is used to indicate that the coin/non-coin
status of the originating line cannot be positively
distinguished for ANI purposes by the SSP. The ANI II pair
23 is substituted for the II pairs which would otherwise
indicate that the non-coin status is known, i.e., 00, or
when there is ANI failure. ANI II 23 may be substituted
for a valid 2-digit ANI pair on 0-800 calls. In all other
cases, ANI II 23 should not be substituted for a valid
2-digit ANI II pair which is forward to an SSP from an
EAEO. Some of the situations in which the ANI II 23 may be
sent:
• Calls from non-conforming end offices (CAMA or LAMA
types) with combined coin/non-coin trunk groups. •
0-800 Calls • Type 1 Cellular Calls • Calls from PBX
Trunks • Calls from Centrex Tie Lines
24 800 Service Call - when an 800 Service database location
converts an 800 number to a POTS number, it replaces the
received ANI code with this "24" code before returning the
POTS number to locations requesting ANI. If the received
800 number is not converted to a POTS number, the database
returns the received ANI code along with the received 800
number. Thus, this "24" code indicates that this is an 800
Service call since that fact can no longer be recognized
simply by examining the called address.
25-26 Unassigned
27 Code 27 identifies a line connected to a pay station which
uses network provided coin control signaling. II 27 is
used to identify this type of pay station line
irrespective of whether the pay station is provided by a
LEC or a non-LEC. II 27 is transmitted from the
originating end office on all calls made from these lines.
28 Unassigned
29 Prison/Inmate Service - the ANI II digit pair 29 is used
to designate lines within a confinement/detention facility
that are intended for inmate/detainee use and require
outward call screening and restriction (e.g., 0+ collect
only service). A confinement/detention facility may be
defined as including, but not limited to, Federal, State
and/or Local prisons, juvenile facilities, immigration and
naturalization confinement/detention facilities, etc.,
which are under the administration of Federal, State,
City, County, or other Governmental agencies.
Prison/Inmate Service lines will be identified by the
customer requesting such call screening and restriction.
In those cases where private paystations are located in
confinement/detention facilities, and the same call
restrictions applicable to Prison/Inmate Service required,
the ANI II digit for Prison/Inmate Service will apply if
the line is identified for Prison/Inmate Service by the
customer.
30-32 Intercept - where the capability is provide to route
intercept calls (either directly or after an announcement
recycle) to an access tandem with an associated Telco
Operator Services System, the following ANI codes should
be used:
30 Intercept (blank) - for calls to unassigned
directory number (DN)
31 Intercept (trouble) - for calls to directory
numbers (DN) that have been manually placed in
trouble-busy state by Telco personnel
32 Intercept (regular) - for calls to recently
changed or disconnected numbers
33 Unassigned
34 Telco Operator Handled Call - after the Telco Operator
Services System has handled a call for an IC, it may
change the standard ANI digits to "34", before outpulsing
the sequence to the IC, when the Telco performs all call
handling functions, e.g., billing. The code tells the IC
that the BOC has performed billing on the call and the IC
only has to complete the call.
35-39 Unassigned
40-49 Unrestricted Use - locally determined by carrier
50-51 Unassigned
52 Outward Wide Area Telecommunications Service (OUTWATS) -
this service allows customers to make calls to a certain
zone(s) or band(s) on a direct dialed basis for a flat
monthly charge or for a charge based on accumulated usage.
OUTWATS lines can dial station-to-station calls directly
to points within the selected band(s) or zone(s). The LEC
performs a screening function to determine the correct
charging and routing for OUTWATS calls based on the
customer’s class of service and the service area of the
call party. When these calls are routed to the
interexchange carrier via a combined WATS-POTS trunk
group, it is necessary to identify the WATS calls with the
ANI code "52".
53-59 Unassigned
60 TRS - ANI II digit pair 60 indicates that the associated
call is a TRS call delivered to a transport carrier from a
TRS Provider and that the call originated from an
unrestricted line (i.e., a line for which there are no
billing restrictions). Accordingly, if no request for
alternate billing is made, the call will be billed to the
calling line.
61 Cellular/Wireless PCS (Type 1) - The "61" digit pair is to
be forwarded to the interexchange carrier by the local
exchange carrier for traffic originating from a
cellular/wireless PCS carrier over type 1 trunks. (Note:
ANI information accompanying digit pair "61" identifies
only the originating cellular/wireless PCS system, not the
mobile directory placing the call.
62 Cellular/Wireless PCS (Type 2) - The "62" digit pair is to
be forwarded to the interexchange carrier by the
cellular/wireless PCS carrier when routing traffic over
type 2 trunks through the local exchange carrier access
tandem for delivery to the interexchange carrier. (Note:
ANI information accompanying digit pair "62" identifies
the mobile directory number placing the call but does not
necessarily identify the true call point of origin.)
63 Cellular/Wireless PCS (Roaming) - The "63" digit pair is
to be forwarded to the interexchange carrier by the
cellular/wireless PCS subscriber "roaming" in another
cellular/wireless PCS network, over type 2 trunks through
the local exchange carrier access tandem for delivery to
the interexchange carrier. (Note: Use of "63" signifies
that the "called number" is used only for network routing
and should not be disclosed to the cellular/wireless PCS
subscriber. Also, ANI information accompanying digit pair
"63" identifies the mobile directory number forwarding the
call but does not necessarily identify the true
forwarded-call point of origin.)
64-65 Unassigned
66 TRS - ANI II digit pair 66 indicates that the associated
call is a TRS call delivered to a transport carrier from a
TRS Provider, and that the call originates from a
hotel/motel. The transport carrier can use this
indication, along with other information (e.g., whether
the call was dialed 1+ or 0+) to determine the appropriate
billing arrangement (i.e., bill to room or alternate
bill).
67 TRS - ANI II digit pair 67 indicates that the associated
call is a TRS call delivered to a transport carrier from a
TRS Provider and that the call originated from a
restricted line. Accordingly, sent paid calls should not
be allowed and additional screening, if available, should
be performed to determine the specific restrictions and
type of alternate billing permitted.
68-69 Unassigned
70 Code 70 identifies a line connected to a pay station
(including both coin and coinless stations) which does not
use network provided coin control signaling. II 70 is used
to identify this type pay station line irrespective of
whether the pay station is provided by a LEC or a non-LEC.
II 70 is transmitted from the originating end office on
all calls made from these lines.
71-79 Unassigned
80-89 Reserved for Future Expansion "to" 3-digit Code
90-92 Unassigned
93 Access for private virtual network types of service: the
ANI code "93" indicates, to the IC, that the originating
call is a private virtual network type of service call.
94 Unassigned
95 Unassigned - conflict with Test Codes 958 and 959
96-99 Unassigned
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