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TUCoPS :: Phreaking Technical System Info :: 6_6_05.txt

Q.699 1/2




                                  SECTION 3

              INTERWORKING BETWEEN DIGITAL SUBSCRIBER SIGNALLING

                   SYSTEM No. 1 AND SIGNALLING SYSTEM No. 7


                             ____________________
                             Recommendation Q.699
                             ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ

            INTERWORKING BETWEEN THE DIGITAL SUBSCRIBER SIGNALLING


   SYSTEM LAYER 3 PROTOCOL AND THE SIGNALLING SYSTEM No.  7 ISDN USER PART


1 :  General
~~~~~~~~~~~~
 * 1.1 :  Introduction

   This Recommendation defines the interworking relationship between the layer
3 functions and protocol of Digital Subscriber Signalling System No.  1 (DSS
1) and the ISDN User Part functions and protocol of Signalling System No.  7.

   The interworking between the above two signalling protocols typically may
occur in an ISDN local exchange and is specified in the context of a typical
call in a pure ISDN or mixed ISDN/non-ISDN environment.



 * 1.2 :  Purpose

   The purpose of the Recommendation is:

   a) to define how the layer 3 protocol of DSS 1 and Signalling System No.  7
      ISDN User Part protocol should be used in combination with call control
      functions, to support the basic bearer service;

   b) to provide a logical bridge between the abstract signalling information
      flows, which are used in the description of ISDN services, and the
      corresponding messages and elements of procedure of the ISDN
      User-Network Interface User Part protocols.


 
 * 1.3 :  Scope

   This Recommendation is aimed at defining the interworking relationship
between the call control protocol of the Digital Sub- scriber Signalling
System No.  1 and the ISDN User Part of Signal- ling System No.  7.

   The Recommendation defines in detail the relationship between signalling
information conveyed via the Digital Subscriber Signalling System No.  1
protocol and similar signalling information conveyed via the ISDN User Part of
Signalling System No.  7.  The above relationship is described within the
context of supporting the provision of basic bearer service for a call within
an ISDN or mixed ISDN/non-ISDN environment.



 * 1.4 :  Relationship to other Recommendations

   This Recommendation forms part of a set of interlocking ISDN service and
signalling Recommendations.  Other members of this set include the following:

    o the operation of basic ISDN telephony teleservice and 64 kbitB/Fs bearer
      service, which is supported in part via the interworking of the ISDN
      signalling systems described herein, is defined in detail in
      Recommendation Q.71 (basic service stage 2 description);

    o the signalling messages and elements of procedure of layer of the
      Digital Subscriber Signalling System No.  1 and the ISDN User Part of
      Signalling System No.  7 are defined in Recommendations Q.930/931
      (I.450/451) and Recommendations Q.761-Q.764 and Q.766, respectively.



2 :  Methodology
~~~~~~~~~~~~~~~~
 * 2.1 :  General

   This chapter describes the methodology used to model and define
interworking between the ISDN User Part and layer 3 of Digital Subscriber
Signalling System No.  1.  The methodology is based on the layer service
concepts prescribed by the Reference Model of Open System Interconnection
(OSI) for CCITT Applications (Recommendation X.200) and uses the terms and
conventions defined in Recommendation X.210 (OSI Layer Service Definition
Conventions).

   The methodology used is for description purposes only.  It does not imply
that this type of layering is essential in a real implementation.

   The interworking model is described in S 2.2.  Subsequent sections identify
and review the diagrams and tables utilized in describing the model, its
functions and the signalling information transfers between the call control
functional entities.



 * 2.2 :  Interworking model

   The interworking model encompasses 3 functional entities, including call
control, the incoming signalling system and the outgoing signalling system,
where incoming or outgoing refers to the direction of call set-up.  The
signalling system entities may represent either the ISDN User Part of the User
Network Interface Protocol.

   The call control entity acts as an intermediary between the ISDN access and
network signalling protocols.  It typically invokes local call processing
decisions/actions as a result of receiving a primitive from one signalling
system (e.g.  incoming access).  As a result of that processing, it may send a
primitive to the same sigalling system and/or another signalling system (e.g.
outgoing network).  Local call processing decisions/actions (e.g.  routing and
through connection) are independent of the type of signalling system used by
call control entities to communicate with each other.

   There are 4 types of primitives:

   a) Request:  A primitive issued by a call control entity to invoke a
      signalling procedure and thereby transfer information to a peer entity.

   b) Indication:  A primitive issued by the signalling protocol to invoke a
      call control procedure or indicate that procedure has been invoked by
      the peer call control entity.

   c) Response:  A primitive issued by call control (if required), to indicate
      completion of a procedure previously invoked by an indication.

   d) Confirm:  A primitive issued by the signalling protocol to call control
      (if required) to indicate completion of a procedure previously invoked
      by a request from the same call control entity.

   The descriptions of the incoming and outgoing signalling system functional
entities are not part of this Recommendation but are provided in
Recommendation Q.931 for Digital Subscriber Signalling System and in
Recommendations Q.761-Q.764 and Q.766 for the ISDN User Part.

                                                      Figure 1/Q.699, p. 1

 * 2.3 :  Time sequence diagrams

   Time sequence or "arrow" diagrams are provided to show the permitted
temporal relationships between primitives and between primitives and
signalling messages, and the time sequence of these relationships during the
process of executing a call control procedure.  The general format of an arrow
diagram is shown in Figure 2/Q.699.

   Due to the multiplicity of optional possibilities in both the ISDN User
Part and the Digital Subscriber Signalling System protocols not all possible
cases are shown in the arrow diagrams.  The diagrams which are included
represent a sample of typical situations.

   Sequences of interactions are shown along vertical lines which represent
increasing time in the downward direction.

   Broken line arrows represent individual primitives and indicate their
direction of propagation, i.e.  to or from call control.

   Solid line arrows represent signalling messages and indicate their
direction of propagation, i.e.  to or from the incoming or outgoing signalling
system.

   Wavy line arrows ( ), if present, represent tones or announcements sent
inband.

   For call control the following symbols are used between vertical lines to
indicate the relationship between the incoming and outgoing primitives (e.g.
between B indication and B response) and possibly a call control action taken,
where it is necessary to indicate clearly a particular function that is
invoked by a received primitive.

   Solid line ( ):  the incoming and outgoing primitives are unconditionally
related, i.e.  the incoming primitive always triggers the sending of the
outgoing primitive independent of the service context in which the incoming
primitive is received.

   Broken line ( ):  the incoming and outgoing primitives are related only in
the service context considered.  In a different service context this
relationship may not exist.

   Squiggly line ( ):  the reception of the incoming primitive and the
transmission of the outgoing primitive are unrelated.  This is to indicate
that although these primitives are shown as adjacent in the arrow diagram, the
generation of the outgoing primitive is unrelated to the receipt of the
incoming primitive.

                                                              Figure, p. 2

   Where it is necessary to indicate the signalling system function performed
on transmission or reception of a signalling message, the following symbols
are shown below the concerned message:

                                                              Figure, p. 3

                                                      Figure 2/Q.699, p. 4

 * 2.4 :  Mapping tables

   Mapping tables are provided to define the relationship between User-Network
Interface Protocol messages and information elements on the one hand and ISDN
User Part messages and parameters on the other hand.

   One table is provided for each User-Network Interface Protocol message that
maps onto an ISDN User Part message.  The same table also specifies the
mapping of elements of information which are carried by the concerned
messages.

   Elements of information that are of local significance only, i.e.  are not
mapped onto elements of information in the other signalling system, are not
shown.



3 :  Interworking specification for successful call set-up procedures
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 * 3.1 :  Arrow diagrams

   This section contains the interworking arrow diagrams for the successful
call set-up procedures.


3.1.1 Enbloc, non-automatic answering terminal, sending of address complete
~~~~~ independent of access

   Figure 3/Q.699 shows the sequence of messages for successful call set-up
where enbloc address signalling is used, the Address Complete Message (ACM) is
sent by the network independent of access indications, and the called party is
not an automatic answering terminal.


3.1.2 Enbloc, automatic answering terminal, sending of address complete
~~~~~ independent of access

   Figure 4/Q.699 shows the sequence of messages for successful call set-up
where enbloc address signalling is used, the address complete Message is sent
independent of access indications, and the called party is an automatic answer
terminal (fast connect scenario).


3.1.3 Enbloc, non-automatic answering terminal
~~~~~
   Figure 5/Q.699 shows the sequence of messages for successful call set-up
where enbloc address signalling is used, the Address Complete Message is
delayed until receipt of alerting indication from the access, and the called
party is not an automatic answering terminal.


3.1.4 Enbloc, automatic answering terminal
~~~~~
   Figure 6/Q.699 shows successful call set-up with enbloc address signalling,
and the address complete indication delayed until receipt of connect
indication from an automatic answering terminal.  In this case the address
complete indication and connect indication are combined in the Connect message
in the network.


3.1.5 Overlap addressing, originating access only, non-automatic answering
~~~~~ terminal

   Figure 7/Q.699 shows the sequence of messages when overlap addressing is
used between the calling party and the originating local exchange, and enbloc
addressing is used within the network.  An independent ACM and non-automatic
answering terminal is assumed in this case.  Variations are possible as in
Figures 3/Q.699-6/Q.699.


3.1.6 Overlap addressing, originating access and network, non-automatic
~~~~~ answering terminal

   Figure 8/Q.699 shows the sequence of messages when overlap addressing is
used at the originating access and within the network.  In this case the ACM
through the network informs the originating local exchange that enough address
information has been received, and the exchange can therefore indicate CALL
PROCeeding to the calling party.


3.1.7 Overlap addressing, both accesses and network, address complete cannot
~~~~~ be determined by number analysis

   In Figure 9/Q.699, overlap addressing is used at both accesses and in the
network.  An example is a call made to an ISDN PABX, where determination of
address complete may only be made as a result of an indication, e.g.
alerting, from the called access.  In this case, the ALERTing message from the
called access allows the sending of an ACM in the network, which since it
carries the "subscriber free" indication is mapped to ALERTing at the calling
access.


3.1.8 Overlap addressing, originating access and network, address complete
~~~~~ determined by number analysis

   In Figure 10/Q.699, overlap addressing is used to reduce the post-dialing
delay by allowing connection set-up to be in parallel with the entering of
digits by the calling party.  In this case, proceeding indications can be
independently derived from number analysis.  The diagram assumes independent
ACM sending, however alternative cases are possible as in Figures
3/Q.699-6/Q.699.


3.1.9 ISDN to analogue subscriber
~~~~~
   Figure 12/Q.699 shows the sequence of messages for a call from an ISDN
subscriber to an analogue subscriber.  The arrows between the local exchange
and non-ISDN user indicate signals that may vary with the access protocol.


3.1.10 Analogue subscriber to ISDN
~~~~~~
   Figure 13/Q.699 shows the sequence of messages for a call from an analogue
subscriber to an ISDN subscriber.  Again, the arrows between non-ISDN user and
local exchange indicate signals that may vary with the access protocol.
Procedures for ACM and ANM may vary as in Figures 3/Q.699-6/Q.699.  Overlap
addressing may also be used in this case.  Interworking then follows the
message flows shown in Figures 8/Q.699 and 10/Q.699.


3.1.11 ISDN-PSTN interworking
~~~~~~
   Figure 14/Q.699 shows the interworking between ISDN and PSTN, in the case
where the PSTN does not provide an out-of-band address complete indication.
More detailed interworking between ISDN and PSTN is given in the Q.600
Recommendations.


3.1.12 PSTN-ISDN interworking
~~~~~~
   Figure 15/Q.699 shows interworking in a call originating in the PSTN, where
the PSTN does not provide an out-of-band address complete indication.  Overlap
addressing may also be used in this case.  Interworking then follows the
message flows shown in Figures 8/Q.699 and 10/Q.699.


3.1.13 ISDN-PSTN interworking, PSTN support out-of-band address complete
~~~~~~ indication

   Figure 16/Q.699 shows interworking where the PSTN provides an out-of-band
address complete indication.  As noted, the primitive and ACM indicators may
differ depending on whether or not the PSTN provides call progress
indications.  More detailed interworking between ISDN and PSTN is given in the
Q.600 Recommendations.


3.1.14 PSTN-ISDN interworking, PSTN supports out-of-band address complete
~~~~~~ indication

   Figure 17/Q.699 shows interworking for a call originating in the PSTN,
where the PSTN provides out-of-band address complete indications.


3.1.15 User-generated PROGress message, sending of address complete
~~~~~~ independent of access.

   Figure 18/Q.699 shows the case where the PROGress message in Q.931 is used
to indicate interworking outside of the public network.  In order to support
user-generated in-band information, the terminating exchange may optionally
through-connect in the backwards direction on receipt of the PROGress message
(see Annex O of Recommendation Q.931).


3.1.16 User-generated PROGress message
~~~~~~
   Figure 19/Q.699 shows the corresponding case when the address complete
indication is delayed until an indication is received from the access, and the
PROGress message maps to an Address Complete Message.


3.1.17 Overlap addressing, both accesses and within network, transfer of
~~~~~~ address complete indication via call proceeding

   Figure 11/Q.699 shows the case where the indication that complete address
information has been received is transferred by the terminating access in the
proceeding primitive.


3.1.18 Notes relative to Figures 3/Q.699 to 19/Q.699
~~~~~~
   The following notes apply to all interworking diagrams in this section:

   o If continuity check occurs in the network, the SET-UP request primitive
     in the terminating local exchange is not passed until continuity is
     verified.

   o Through-connection for specific cases may vary from the examples shown,
     e.g.  for different PSTN signalling systems.  More detailed information
     can be found in Recommendation Q.764, SS 2.1.1.1 and 2.1.2.1.

   The remaining notes apply where referenced in particular figures:

Note 1 - This message may be sent by the user to achieve symmetrical working
         or to avoid timer expiry on response to SET-UP (see Recommendation
         Q.931 S 5.2.5.1).

Note 2 - This message may be sent by the user to achieve symmetrical working
         (see Recommendation Q.931 S 5.1.8).

Note 3 - Called line status = no indication; ISDN access indicator = ISDN
         access.

Note 4 - Called line status = subscriber free; ISDN access indicator = ISDN
         access.

Note 5 - The number of INFORMATION messages and primitives shown is for
         example only.  In practice the number may be zero or more; of zero,
         the Set-up request and Proc request primitives may be originated on
         expiry of timer T302 (see S 5.1.5.2 of Recommendation Q.931).

Note 6 - Progress indicator = 2 - destination address is non-ISDN.

Note 7 - Called line status = subscriber free; ISDN User Part indicator = ISDN
         User Part used all-the-way; ISDN access indicator = non-ISDN Access.

Note 8 - ISDN User Part indicator = ISDN User Part used all-the-way; ISDN
         access indicator = non-ISDN Access.

Note 9 - Conditional on type of access.

Note 10 - Progress indicator = 3 - origination address is non-ISDN.

Note 11 - Completion of transmission path timing is described in S 2.1.9.1 of
          Recommendation Q.764.

Note 12 - Called line status = no indication; ISDN User Part indicator = ISDN
          User Part not used all-the-way; ISDN access indicator = non-ISDN
          access.

Note 13 - ISDN User Part indicator = ISDN User Part not used all-the-way; ISDN
          access indicator = non-ISDN access.

Note 14 - Primitive is either Progress or Alerting, depending on the PSTN
          indication.  If the PSTN indicates Alerting (subscriber free), then
          an ALERTing message replaces the PROGress message at the originating
          Q.931 interface.

Note 15 - Called line status depends on PSTN indication; ISDN User Part
          indicator = ISDN User Part not used all-the-way; ISDN access
          indicator = non-ISDN access.

Note 16 - Progress indicator = 1 - Call is not end-to-end ISDN, further
          information available inband.

Note 17 - Called line status = no indication; Access transport parameter
          contains Progress information element.

Note 18 - The set-up message may in some cases contain sufficient information.
          If user equipment can determine immediately that address information
          is complete, both SET-UP ACK and the sequence of INFO messages are
          omitted.  Alternatively, the SET-UP ACK may be sent, followed by
          CALL PROC, which maps to ACM.

                                                      Figure 3/Q.699, p. 5

                                                      Figure 4/Q.699, p. 6

                                                      Figure 5/Q.699, p. 7

                                                      Figure 6/Q.699, p. 8

                                                      Figure 7/Q.699, p. 9

                                                     Figure 8/Q.699, p. 10

                                                     Figure 9/Q.699, p. 11

                                                    Figure 10/Q.699, p. 12

                                                    Figure 11/Q.699, p. 13

                                                    Figure 12/Q.699, p. 14

                                                    Figure 13/Q.699, p. 15

                                                    Figure 14/Q.699, p. 16

                                                    Figure 15/Q.699, p. 17

                                                    Figure 16/Q.699, p. 18

                                                    Figure 17/Q.699, p. 19

                                                    Figure 18/Q.699, p. 20

                                                    Figure 19/Q.699, p. 21


 * 3.2 :  Mapping of Parameters

   This section contains the mapping tables of successful call set-up messages
and associated parameters and information elements.

       -v'1P'
                                 H.T. [T1.699]
                                  TABLE 1/Q.699
              Mapping of set-up procedure parameters for ISDN call

       _______________________________________________________________________________________________________________
                                     Originating  User/Network              Network            Termiing  User/Network
       _______________________________________________________________________________________________________________
                Message                        SETUP                          IAM                     SETUP
       _______________________________________________________________________________________________________________
                                                                   User service information
                Contents           Bearer capability                                           Beareapability
       _______________________________________________________________________________________________________________
                                   No mapping                      Forward call indicator      No mang
                                   Progress indicator              Access transport (Note 2)   Progr indicator
                                    {
        Calling party number
        (Note 6)
         }                          {
        Calling party number
        (Note 3)
         }                         Calling party number
                                   Calling party subaddress        Access transport            Calliparty subaddress
                                   Called party number  (Note 4)   Called party number         Callearty number
                                   Setup complete                  ST digit (Note 5)           No mang
                                   Called party subaddress         Access transport            Callearty subaddress
                                   Transit network sel.            Transit network sel.        No mang
                                   Low layer compatibility         Access transport            Low lr compatibility
                                   High layer compatibility        Access transport
        High layer compatibility
       _______________________________________________________________________________________________________________


Note 1 - The User Service Information parameter carries the customer's bearer
         service request unchanged through the network, and is mapped at the
         terminating exchange.  Transmission Medium Requirements maps from the
         service request to a network connection type.  It is not mapped at
         the terminating exchange in an ISDN call.  For calls between networks
         (e.g.  international gateways), the contents of the Bearer Capability
         information element carried within the User Service Information
         parameter may be changed, e.g.  where A-law to mu-law conversion
         applies.

Note 2 - The access Transport parameter carries information elements
         transparently from one User/Network interface to the other
         User/Network interface.

Note 3 - The calling party number is recommended to be carried in the IAM,
         however it may optionally be delayed until a subsequent end-to-end
         request in the network.  Number and subaddress should be carried in
         the same message.

Note 4 - The Keypad Facility information element may be used to carry called
         party number information in the user-to-network direction (described
         in S 5.1 of Recommendation Q.921) rather than the Called Party Number
         information element.  This is then mapped to the Called Party Number
         parameter within the network.

Note 5 - The ST digit is an address signal carried within the Called Party
         Number parameter.

Note 6 - The calling party number may be provided solely to indicate calling
line identity restriction.

                                           Tableau 1/Q.699 [T1.699], p. 22


                                 H.T. [T2.699]
                                  TABLE 2/Q.699
                Mapping of set-up parameters for PSTN-ISDN call

       _____________________________________________________________________
                    Not Applicable     Network    Terminating  User/Network
       _____________________________________________________________________
        Message                          IAM                SETUP
       _____________________________________________________________________
                   {

                  Bearer capability     {


                  Progress indicator
       _____________________________________________________________________


                                           Tableau 2/Q.699 [T2.699], p. 23



                                 H.T. [T3.699]
                                  TABLE 3/Q.699
         Mapping of subsequent address information for overlap sending

       ______________________________________________________________________________________________________
                                               Originating  User/Network   Network    Terminating  U/Network
       ______________________________________________________________________________________________________
                      Message                            INFO                SAM                INFO     ______________________________________________________________________________________________________
                      Contents                  {
        Called party number of Keypad (Note)
                          }                    Subsequent number









             Called party number (Note)
       ______________________________________________________________________________________________________

      |
      |
                                            |
                                            |
                                                                        |
                                                                        |
                                                                                    |
                                                                                    |
                                                                                                            |
                                                                                                            |




       Note  - Sending complete  may  be  included  at  both  User/Network
       interfaces in the INFORMATION message.
                                           Tableau 3/Q.699 [T3.699], p. 24



                                 H.T. [T4.699]
                                  TABLE 4/Q.699
                    Mapping of interworking with PSTN inband

       ________________________________________________________________________________________________________
                                                 Originating  User/Network   Network    Terminating er/Network
       ________________________________________________________________________________________________________
                       Message                       PROGress  (Note)          ACM           Not appable
       ________________________________________________________________________________________________________
                       Contents                  Progress indicator           {
        Backward call indicator (interworking)
                           }
       ________________________________________________________________________________________________________


       Note  - The ACM may also map to the CALL PROCEEDING message if this
       has not already been sent.
                                           Tableau 4/Q.699 [T4.699], p. 25




                                 H.T. [T5.699]
                                  TABLE 5/Q.699
                      Mapping of alerting, independent ACM

       ______________________________________________________________________________________________
                   Originating  User/Network             Network              Terminating  User/Netw
       ______________________________________________________________________________________________
        Message            ALERTing                        CPG                        ALERTing
       ______________________________________________________________________________________________
                   alerting (implicit)         Event information (alerting)   alerting (implicit)
        Contents   Progress indicator          Access transport               Progress indicator
       ______________________________________________________________________________________________












                                           Tableau 5/Q.699 [T5.699], p. 26



                                 H.T. [T6.699]
                                  TABLE 6/Q.699
                              Mapping of alerting


       _____________________________________________________________________________________
                   Originating  User/Network       Network        Terminating  User/Network
       _____________________________________________________________________________________
        Message            ALERTing                  ACM                  ALERTing
       _____________________________________________________________________________________
                   alerting (implicit)          {

                   alerting (implicit)

        Contents
                   Progress indicator          Access transport   Progress indicator
       _____________________________________________________________________________________




                                           Tableau 6/Q.699 [T6.699], p. 27



                                 H.T. [T7.699]
                                  TABLE 7/Q.699
         Mapping of answer indication, non-automatic answering terminal

       _____________________________________________________________________________________
                   Originating  User/Network       Network        Terminating  User/Network
       _____________________________________________________________________________________
        Message             CONNect                  ANM                   CONNect
       _____________________________________________________________________________________
        Contents   Progress indicator          Access transport   Progress indicator
       _____________________________________________________________________________________





                                           Tableau 7/Q.699 [T7.699], p. 28


                                 H.T. [T8.699]
                                  TABLE 8/Q.699
           Mapping of answer indication, automatic answering terminal

       _____________________________________________________________________________________
                   Originating  User/Network       Network        Terminating  User/Network
       _____________________________________________________________________________________
        Message             CONNect                  CON                   CONNect
       _____________________________________________________________________________________
        Contents   Progress indicator          Access Transport   Progress indicator
       _____________________________________________________________________________________






                                           Tableau 8/Q.699 [T8.699], p. 29



                                 H.T. [T9.699]
                                 TABLE 8a/Q.699
                         Mapping of progress indication

       _____________________________________________________________________________________
                   Originating  User/Network       Network        Terminating  User/Network
       _____________________________________________________________________________________
        Message            PROGress                  CPG                  PROGress
       _____________________________________________________________________________________
                   Progress (implicit)          {

                   Progress (implicit)

        Contents
                   Progress indicator          Access transport   Progress indicator
       _____________________________________________________________________________________





                                          Tableau 8A/Q.699 [T9.699], p. 30

                                 H.T. [T10.699]
                                 TABLE 8b/Q.699
                         Mapping of progress indication

       _____________________________________________________________________________________
                   Originating  User/Network       Network        Terminating  User/Network
       _____________________________________________________________________________________
        Message            PROGress                  ACM                  PROGress
       _____________________________________________________________________________________
                   Progress (implicit)          {

                   Progress (implicit)

        Contents
                   Progress indicator          Access transport   Progress indicator
       _____________________________________________________________________________________




                                         Tableau 8B/Q.699 [T10.699], p. 31


 * 3.3 :  Mapping of the parameter fields

   This section contains the mapping tables of parameter subfields and values
for the Progress Indicator of Recommendation Q.931 and the associated fields
in ISUP.

   The following notes apply to all mapping tables in this attachment:

   o The mapping of the Backward Call Indicator in the Answer Mesage only
     applies when this indicator is included in the Answer Message.

   o For simplicity, these diagrams assume the case where the ACM is not sent
     independently, and a non-automatic answering terminal is the called
     party.  Other configurations are possible as shown in the arrow diagrams,
     but do not affect parameter mapping rules.


3.3.1 Scenario 1
~~~~~
                                                              Figure, p. 32


                                 H.T. [T11.699]
                                  TABLE 9/Q.699
                 Parameter fields mapping for Q.931-ISUP-Q.931


       _________________________________________________________________________________________________
                                      Originating  User/Network     Network      Terminating  User/Nork
       _________________________________________________________________________________________________
                  Message                       SETUP                 IAM                  SETUP
       _________________________________________________________________________________________________
                  Content             no Progress ind.             {
             Forward call ind.
                   Bit D
                   = 0,
        no interworking encountered
                    Bit
                     F
                   = 1,
           ISUP used all the way
                    Bit
                     I
                   = 1,
          originating access ISDN
                     }                no Progress ind.
       _________________________________________________________________________________________________
                  Message                     ALERTing                ACM                ALERTing
       _________________________________________________________________________________________________
                  Content             no Progress ind.             {
            Backward call ind.
                   Bit I
                   = 0,
        no interworking encountered
                    Bit
                     K
                   = 1,
           ISUP used all the way
                    Bit
                     M
                   = 1,
          terminating access ISDN
                     }                no Progress ind.
       _________________________________________________________________________________________________
                  Message                      CONNect                ANM                 CONNect
       _________________________________________________________________________________________________
                  Content             no Progress ind.             {
            Backward call ind.
                   Bit I
                   = 0,
        no interworking encountered
                    Bit
                     K
                   = 1,
           ISUP used all the way
                    Bit
                     M
                   = 1,
          terminating access ISDN
                     }                no Progress ind.
       _________________________________________________________________________________________________


                                          Tableau 9/Q.699 [T11.699], p. 33










3.3.2 Scenario 2
~~~~~
                                                             Figure, p. 34


                                 H.T. [T12.699]
                                 TABLE 10/Q.699
                  Parameter fields mapping for Q.931-ISUP-PSTN



       ____________________________________________________________________________________________________________________________________________
                                                                                 Originating  User/Nork     Network      Terminating  User/Network
       ____________________________________________________________________________________________________________________________________________
                                       Message                                             SETUP              IAM                   N/A
       ____________________________________________________________________________________________________________________________________________
                                       Content                                   no Progress ind.          {
                                  Forward call ind.
                                        Bit D
                                         = 0,
                             no interworking encountered
                                         Bit
                                          F
                                        = 1,
                                ISUP used all the way
                                         Bit
                                          I
                                         = 1,
                               originating access ISDN
                                           }                                     no mapping applied
       ____________________________________________________________________________________________________________________________________________
                                       Message                                           PROGress             ACM                   N/A
       ____________________________________________________________________________________________________________________________________________
                                       Content                                    {
        Progress ind. progress description = ## 1, call is not end-to-end ISDN
                                           }                                      {
                                  Backward call ind.
                                        Bit I
                                         = 1,
                               interworking encountered
                                         Bit
                                          K
                                         = 0,
                              ISUP not used all the way
                                         Bit
                                          M
                                         = 0,
                               terminating access ISDN
                                           }                                     no mapping applied
       ____________________________________________________________________________________________________________________________________________
                                       Message                                            CONNect             ANM                   N/A
       ____________________________________________________________________________________________________________________________________________
                                       Content                                    {
        Progress ind. progress description = ## 1, call is not end-to-end ISDN
                                           }                                      {
                                  Backward call ind.
                                        Bit I
                                         = 1,
                               interworking encountered
                                         Bit
                                          K
                                        = 0,
                              ISUP not used all the way
                                         Bit
                                          M
                                         = 0,
                               terminating access ISDN
                                           }                                     no mapping applied









       ____________________________________________________________________________________________________________________________________________

      |

                                                                              |

                                                                                                       |

                                                                                                                      |

                                                                                                                                                  |

                                         Tableau 10/Q.699 [T12.699], p. 35






3.3.3 Scenario 3
~~~~~
                                                             Figure, p. 36

                                 H.T. [T13.699]
                                 TABLE 11/Q.699
                  Parameter fields mapping for PSTN-ISUP-Q.931



       _______________________________________________________________________________________________________________________________________
                                                                            Originating  User/Networ   Network      Terminating  User/Network
       _______________________________________________________________________________________________________________________________________
                                     Message                                           N/A               IAM                  SETUP
       _______________________________________________________________________________________________________________________________________
                                     Content                                no mapping applied        {
                                Forward call ind.
                                      Bit D
                                      = 1,
                            interworking encountered
                                       Bit
                                        F
                                      = 0,
                            ISUP not used all the way
                                       Bit
                                        I
                                      = 0,
                           originating access non-ISDN
                                        }                                    {
        Progress ind. progress description = ## 1, call is not end-to-end
                                      ISDN
                                        }
       _______________________________________________________________________________________________________________________________________
                                     Message                                           N/A               ACM                ALERTing
       _______________________________________________________________________________________________________________________________________
                                     Content                                no mapping applied        {
                               Backward call ind.
                                      Bit I
                                      = 0,
                           no interworking encountered
                                       Bit
                                        K
                                      = 1,
                              ISUP used all the way
                                       Bit
                                        M
                                      = 1,
                             terminating access ISDN
                                        }                                   no Progress ind.
       _______________________________________________________________________________________________________________________________________
                                     Message                                           N/A               ANM                 CONNect
       _______________________________________________________________________________________________________________________________________
                                     Content                                no mapping applied        {
                               Backward call ind.
                                      Bit I
                                      = 0,
                           no interworking encountered
                                       Bit
                                        K
                                      = 1,
                              ISUP used all the way
                                       Bit
                                        M
                                      = 1,
                             terminating access ISDN
                                        }                                   no mapping applied
       _______________________________________________________________________________________________________________________________________



                                         Tableau 11/Q.699 [T13.699], p. 37

3.3.4 Scenario 4
~~~~~
                                                             Figure, p. 38


                                 H.T. [T14.699]
                                 TABLE 12/Q.699
                Parameter fields mapping for ISUP-Q.931-ANALOGUE


       _______________________________________________________________________________________________________________________________________
                                                                            Originating  User/Networ   Network      Terminating  User/Network
       _______________________________________________________________________________________________________________________________________
                                     Message                                          SETUP              IAM                   N/A
       _______________________________________________________________________________________________________________________________________
                                     Content                                no Progress ind.          {
                                Forward call ind.
                                      Bit D
                                      = 0,
                           no interworking encountered
                                       Bit
                                        F
                                      = 1,
                              ISUP used all the way
                                       Bit
                                        I
                                      = 1,
                             originating access ISDN
                                        }                                   no Progress ind.
       _______________________________________________________________________________________________________________________________________
                                     Message                                        ALERTing             ACM                   N/A
       _______________________________________________________________________________________________________________________________________
                                     Content                                 {
        Progress ind. progress description = ## 2, destination address is
                                    non-ISDN
                                        }                                    {
                               Backward call ind.
                                      Bit I
                                      = 0,
                           no interworking encountered
                                       Bit
                                        K
                                      = 1,
                              ISUP used all the way
                                       Bit
                                        M
                                      = 1,
                           terminating access non-ISDN
                                        }                                   no mapping applied
       _______________________________________________________________________________________________________________________________________
                                     Message                                         CONNect             ANM                   N/A
       _______________________________________________________________________________________________________________________________________
                                     Content                                 {
        Progress ind. progress description = ## 2, destination address is
                                    non-ISDN
                                        }                                    {
                               Backward call ind.
                                      Bit I
                                      = 0,
                           no interworking encountered
                                       Bit
                                        K
                                      = 1,
                              ISUP used all the way
                                       Bit
                                        M
                                      = 1,









                           terminating access non-ISDN
                                        }                                   no mapping applied
       _______________________________________________________________________________________________________________________________________



                                         Tableau 12/Q.699 [T14.699], p. 39

3.3.5 Scenario 5
~~~~~
                                                             Figure, p. 40

                                 H.T. [T15.699]
                                 TABLE 13/Q.699
                Parameter fields mapping for ANALOGUE-ISUP-Q.931


       _______________________________________________________________________________________________________________________________________
                                                                            Originating  User/Networ   Network      Terminating  User/Network
       _______________________________________________________________________________________________________________________________________
                                     Message                                           N/A               IAM                  SETUP
       _______________________________________________________________________________________________________________________________________
                                     Content                                no mapping applied        {
                                Forward call ind.
                                      Bit D
                                      = 0,
                           no interworking encountered
                                       Bit
                                        F
                                      = 1,
                              ISUP used all the way
                                       Bit
                                        I
                                      = 0,
                           originating access non-ISDN
                                        }                                    {
        Progress ind. progress description = ## 3, originating address is
                                    non-ISDN
                                        }
       _______________________________________________________________________________________________________________________________________
                                     Message                                           N/A               ACM                ALERTing
       _______________________________________________________________________________________________________________________________________
                                     Content                                no mapping applied        {
                               Backward call ind.
                                      Bit I
                                      = 0,
                           no interworking encountered
                                       Bit
                                        K
                                      = 1,
                              ISUP used all the way
                                       Bit
                                        M
                                      = 1,
                             terminating access ISDN
                                        }                                   no Progress ind.
       _______________________________________________________________________________________________________________________________________
                                     Message                                           N/A               ANM                 CONNect
       _______________________________________________________________________________________________________________________________________
                                     Content                                no mapping applied        {
                               Backward call ind.
                                      Bit I
                                      = 0,
                           no interworking encountered
                                       Bit
                                        K
                                      = 1,
                              ISUP used all the way
                                       Bit
                                        M
                                      = 1,
                             terminating access ISDN
                                        }                                   no Progress ind.
       _______________________________________________________________________________________________________________________________________

                                                                                                                                             |

                                         Tableau 13/Q.699 [T15.699], p. 41


3.3.6 Scenario 6
~~~~~
                                                             Figure, p. 42


                                 H.T. [T16.699]
                                 TABLE 14/Q.699
             Parameter fields mapping for ANALOGUE-Q.931-ISUP-Q.931



       ________________________________________________________________________________________________________________________________________________
                                                                                     Originating  UsNetwork     Network      Terminating  User/Network
       ________________________________________________________________________________________________________________________________________________
                                         Message                                               SETUP              IAM                  SETUP
       ________________________________________________________________________________________________________________________________________________
                                         Content                                      {
        Progress ind. progress description = ## 3, originating address in non-ISDN
                                location = private network
                                             }                                        {
                                    Forward call ind.
                                          Bit D
                                           = 0,
                               no interworking encountered
                                           Bit
                                            F
                                          = 1,
                                  ISUP used all the way
                                           Bit
                                            I
                                           = 1,
                                 originating access ISDN
                                 Access transport carries
                                      Progress ind.
                                             }                                        {
                          Progress ind. as received from the ATP
                                             }
       ________________________________________________________________________________________________________________________________________________
                                         Message                                             ALERTin              ACM                ALERTing
       ________________________________________________________________________________________________________________________________________________
                                         Content                                     no Progress ind           {
                                    Backward call ind.
                                          Bit I
                                           = 0,
                               no interworking encountered
                                           Bit
                                            K
                                          = 1,
                                  ISUP used all the way
                                           Bit
                                            M
                                           = 1,
                                 terminating access ISDN
                                             }                                       no Progress ind      ________________________________________________________________________________________________________________________________________________
                                         Message                                              CONNec              ANM                 CONNect
       ________________________________________________________________________________________________________________________________________________
                                         Content                                     no Progress ind           {
                                    Backward call ind.
                                          Bit I
                                           = 0,
                               no interworking encountered
                                           Bit
                                            K
                                          = 1,
                                  ISUP used all the way
                                           Bit
                                            M









                                           = 1,
                                 terminating access ISDN
                                             }                                       no Progress ind      ________________________________________________________________________________________________________________________________________________




                                         Tableau 14/Q.699 [T16.699], p. 43

3.3.7 Scenario 7
~~~~~

                                                             Figure, p. 44

                                 H.T. [T17.699]
                                 TABLE 15/Q.699
             Parameter fields mapping for Q.931-ISUP-Q.931-ANALOGUE

       ___________________________________________________________________________________________________________________________________________
                                                                                Originating  User/Nerk     Network      Terminating  User/Network
       ___________________________________________________________________________________________________________________________________________
                                       Message                                            SETUP              IAM                  SETUP
       ___________________________________________________________________________________________________________________________________________
                                       Content                                  no Progress ind.          {
                                  Forward call ind.
                                        Bit D
                                        = 0,
                             no interworking encountered
                                         Bit
                                          F
                                        = 1,
                                ISUP used all the way
                                         Bit
                                          I
                                        = 1,
                               originating access ISDN
                                          }                                     no Progress ind.
       ___________________________________________________________________________________________________________________________________________
                                       Message                                          ALERTing             ACM                ALERTing
       ___________________________________________________________________________________________________________________________________________
                                       Content                                   {
                        Progress ind. as received in the ATP
                                          }                                      {
                                 Backward call ind.
                                        Bit I
                                        = 0,
                             no interworking encountered
                                         Bit
                                          K
                                        = 1,
                                ISUP used all the way
                                         Bit
                                          M
                                        = 1,
                               terminating access ISDN
                           ATP carries Progress indicator
                                          }                                      {
           Progress ind. progress description = ## 2, destination address
                       in non-ISDN location = private network
                                          }
       ___________________________________________________________________________________________________________________________________________
                                       Message                                           CONNect             ANM                 CONNect
       ___________________________________________________________________________________________________________________________________________
                                       Content                                   {
                        Progress. ind. as received in the ATP
                                          }                                      {
                                 Backward call ind.
                                        Bit I
                                        = 0,
                             no interworking encountered
                                         Bit
                                          K
                                        = 1,
                                ISUP used all the way
                                         Bit









                                          M
                                        = 1,
                               terminating access ISDN
                           ATP carries Progress indicator
                                          }                                      {
        Progress ind. (Note) progress description = ## 2, destination address
                       in non-ISDN location = private network
                                          }
       ___________________________________________________________________________________________________________________________________________


Note - The Progress indicator is not necessarily repeated in the CONNECT
       message if it has already appeared in the ALERTING message.  Tableau
       15/Q.699 [T17.699], p.  45




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