InfoMagic Standards 1993 July

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5i' ANNEX B (to Recommendation Q.764) State transition diagrams Note - Should any conflict arise between the text and the SDL definition, the textual description is taken as definitive. B.1 General This Annex contains the description of the signalling pro- cedures described in this Recommendation in the form of state tran- sition diagrams according to the CCITT Specification and Descrip- tion Language (SDL). In order to facilitate functional description, the ISDN User Part (ISDN-UP) signalling procedure is divided into main functional blocks, as shown in Figure B-1/Q.764. These blocks are as follows: 1) Signalling procedure control (SPRC) SPRC provides procedures for sending ISDN-UP messages to Level 3 (SCCP or MTP) and distributing received messages to the other ISDN-UP functional blocks. 2) Call processing control (CPC) CPC provides call control procedures for realizing basic circuit switched service according to user's request. 3) Circuit supervision control (CSC) CSC provides procedures for circuit supervision control for maintenance purpose and for recovery from abnormal situation. B.2 Drafting convention a) External inputs and outputs are used for interactions with a remote exchange and interaction between SPRC and the other functional blocks. Internal inputs and outputs are used for interactions within each functional block, e.g., to indi- cate control of time-out. For these interactions, input and output symbols are used as shown in Figure B-2/Q.764. b) Inputs and outputs symbols contain as part of their name acronyms of their source and destination functional block names with an arrow in between, e.g., Blocking BLS CPC. c) A simple example of SDL diagram according to the above conventions is shown in Figure B-3/Q.764. B.3 Abbreviations, timers and primitives B.3.1 Abbreviations 1) Table B-1/Q.764: Signalling procedure control. 2) Table B-2/Q.764: Call processing control. 3) Table B-3/Q.764: Circuit supervision control. B.3.2 Timers Timers used in the ISDN-UP SDL diagrams are shown in Table B-4/Q.764. B.3.3 Primitives Primitives used over the interface between call control and ISDN-UP are shown in Table B-5/Q.764. B.4 State transition diagrams and SDL diagrams Each ISDN-UP main functional block is further subdivided into the functional blocks. Functional diagrams and simple state transi- tion diagrams for each main functional block are shown below: 1) Signalling procedure control (SPRC) - Figure B-4/Q.764 Functional diagrams - Figure B-5/Q.764 State transition diagrams 2) Call processing control (CPC) - Figure B-6/Q.764 Functional diagrams - Figures B-7/Q.764 to B-9/Q.764 State transition diagrams 3) Circuit supervision control (CSC) - Figure B-10/Q.764 Functional diagrams - Figures B-11/Q.764 to B-18/Q.764 State transition diagrams The ISDN-UP SDL diagrams are described based on the three-blocks approach. In this approach, call control, which pro- vides signalling-independent functions such as connect-through, circuit selection and digits analysis, is outside the ISDN-UP. These functions are described only in SS 1-3. The ISDN-UP diagrams are provided for the above subdivided functional blocks, as shown below: 1) Signalling procedure control (SPRC) - Figure B-19/Q.764 Message sending control - Figure B-20/Q.764 Message distributing control 2) Call processing control (CPC) - Figure B-21/Q.764 Call processing control incoming (CPCI) - Figure B-22/Q.764 Call processing control outgoing (CPCO) - Figure B-23/Q.764 Continuity check incoming (CCI) - Figure B-24/Q.764 Continuity check outgoing (CCO) 3) Circuit supervision control (CSC) - Figure B-25/Q.764 Blocking/unblocking message sending (BLS) - Figure B-26/Q.764 Blocking/unblocking message reception (BLR) - Figure B-27/Q.764 Maintenance oriented circuit group blocking/unblocking sending (MGBS) - Figure B-28/Q.764 Blocking/unblocking reception (MGBR) - Figure B-29/Q.764 Hardware failure oriented locally blocking state (HLB) - Figure B-30/Q.764 Hardware failure oriented remotely blocking state (HRB) - Figure B-31/Q.764 Hardware failure oriented circuit group blocking/unblocking sending (HGBS): - Figure B-32/Q.764 Hardware failure oriented circuit group blocking/unblocking reception (HGBR) - Figure B-33/Q.764 Circuit reset sending (CRS) - Figure B-34/Q.764 Circuit reset reception (CRR) - Figure B-35/Q.764 Circuit group reset sending (CGRS) - Figure B-36/Q.764 Circuit group reset reception (CGRR) - Figure B-37/Q.764 Continuity recheck sending (CRCS) - Figure B-38/Q.764 Continuity recheck reception (CRCR) - Figure B-39/Q.764 Circuit group query sending (CQS) - Figure B-40/Q.764 Circuit group query reception (CQR) Figure B-1/Q.764, (N), p. Figure B-2/Q.764, (N), p. 2 Figure B-3/Q.764, (N), p. 3 H.T. [T4.764] TABLE B-1B/FQ.764 Signalling procedure control acronym _____________________________________________________________________________________________________________________________ Acronym Description _____________________________________________________________________________________________________________________________ BLR { Blocking/Unblocking Message Reception } | | | | | BLS { Blocking/Unblocking Message Sending } CCO Continuity Check Outgoing CCI Continuity Check Incoming CGRS Circuit Group Reset Sending CGRR Circuit Group Reset Reception CPC Call Processing Control CRR Circuit Reset Reception CRS Circuit Reset Sending Functional CSC Circuit Supervision Control block name SPRC | | Signalling Procedure Control MGBR { Maintenance Oriented Circuit Group Blocking/Unblocking Reception } HGBR { Hardware Failure Oriented Circuit Group Blocking/Unblocking Reception } MGBS { Maintenance Oriented Circuit Group Blocking/Unblocking Sending } HGBS { Hardware Failure Oriented Circuit Group Blocking/Unblocking Sending } CRCR { Continuity Recheck Control Reception } CRCS { Continuity Recheck Control Sending } CQR Circuit Group Query Reception CQS Circuit Group Query Sending MSDC Message Sending Control MDSC Message Distributing Control BLA | | Blocking Acknowledgement BLO Blocking GRA Group Reset Acknowledgement GRS Group Reset CQR Circuit Group Query Response CQM Circuit Group Query UBA Unblocking Acknowledgement Message type UBL | Unblocking CCR Continuity Check Request CGB Circuit Group Blocking CGBA { Circuit Group Blocking Acknowledgement } CGU Circuit Group Unblocking CGUA { Circuit Group Unblocking Acknowledgement } RSC Reset Circuit CFN Confusion _____________________________________________________________________________________________________________________________ | | | | | | | | | | | | | | | | | | | | | | | | Tableau B-1/Q.764 [T4.764], p. 4 H.T. [T5.764] TABLE B-2B/FQ.764 Call processing control acronym _________________________________________________________________________________________________________________________ Acronym Description _________________________________________________________________________________________________________________________ OGC Outgoing Trunk Circuit General ICC Incoming Trunk Circuit CCH Continuity Check Indicator _________________________________________________________________________________________________________________________ CC | | | | | | | Call control SPRC Signalling Procedure Control CPC Call Processing Control BLR { Blocking/Unblocking Message Reception } BLS { Blocking/Unblocking Message Sending } CCO Continuity Check Outgoing CCI Continuity Check Incoming CGRR { Circuit Group Reset Reception } Functional CRR Circuit Reset Reception block name CRS | | Circuit Reset Sending CPCI { Call Processing Control Incoming } CPCO { Call Processing Control Outgoing } MGBR { Maintenance Oriented Circuit Group Unblocking/Blocking Reception } HGBR { Hardware Failure Oriented Circuit Group Blocking/Unblocking Reception } MGBS { Maintenance Oriented Circuit Group Unblocking/Blocking Sending } HGBS { Hardware Failure Oriented Circit Group Blocking/Unblocking Sending } CRCR Continuity Recheck Reception CRCS Continuity Recheck Sending ACM | | Address Complete ANM Answer COT Continuity CPG Call Progress IAM Initial Address Message type SUS { Suspend (network-or user-initiated) } | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | RES { Resume (network-or user-initiated) } REL Release RLC Release Complete FOT Forward Transfer SAM Subsequent Address CON Connect _________________________________________________________________________________________________________________________ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Tableau B-2/Q.764 [T5.764], p. 5 H.T. [T6.764] TABLE B-3B/FQ.764 Circuit supervision control acronym ________________________________________________________________________________________________________________________ Acronym Description ________________________________________________________________________________________________________________________ BLR { Blocking/Unblocking Reception } | | | | | BLS Blocking/Unblocking Sending CRS Circuit Reset Sending CRR Circuit Reset Reception CGRS Circuit Group Reset Sending CGRR Circuit Group Reset Reception MGBR { Maintenance Oriented Circuit Group Blocking/Unblocking Reception } Functional HGBR { Hardware Failure Oriented Circuit Group Blocking/Unblocking Reception } block name MGBS { Maintenance Oriented Circuit Group Blocking/Unblocking Sending } | | | | | | | | HGBS { Hardware Failure Oriented Circuit Group Blocking/Unblocking Sending } CRCR Continuity Recheck Reception CRCS Continuity Recheck Sending CQR Circuit Group Query Reception CQS Circuit Group Query Sending HRB { Hardware Failure Oriented Remotely Blocking } HLB { Hardware Failure Oriented Locally Blocking State } BLA | | Blocking Acknowledgement BLO Blocking COT Continuity CQR { Circuit Group Query Response } CQM Circuit Group Query GRA Group Reset Acknowledgement GRS Group Reset RLC Release Complete Message type RSC | Reset Circuit UBA Unblocking Acknowledgement UBL Unblocking CGB Circuit Group Blocking CGBA { Circuit Group Blocking Acknowledgement } CCR Continuity Check Request CGU Circuit Group Unblocking CGUA { Circuit Group Unblocking Acknowledgement } REL Release ________________________________________________________________________________________________________________________ | | | | | | | | | | | | | | | | | | Tableau B-3/Q.764 [T6.764], p. 6 H.T. [T7.764] TABLE B-4B/FQ.764 Timer __________________________________________________________________ Timer Symbol Time-out value __________________________________________________________________ First RLC timer T1 4-15 s __________________________________________________________________ Second RLC timer T5 1 min __________________________________________________________________ RES timer (network) T6 Covered in Q.118 __________________________________________________________________ ACM timer T7 20-30 s __________________________________________________________________ COT timer T8 10-15 s __________________________________________________________________ ANM timer T9 Interval specified in Q.118 __________________________________________________________________ First BLA timer T12 4-15 s __________________________________________________________________ Second BLA timer T13 1 min __________________________________________________________________ First UBA timer T14 4-15 s __________________________________________________________________ Second UBA timer T15 1 min __________________________________________________________________ First RSC response timer T16 4-5 s __________________________________________________________________ Second RSC response timer T17 1 min __________________________________________________________________ First CGBA timer T18 4-15 s __________________________________________________________________ Second CGBA timer T19 1 min __________________________________________________________________ First CGUA timer T20 4-15 s __________________________________________________________________ Second CGUA timer T21 1 min __________________________________________________________________ First GRA timer T22 4-15 s __________________________________________________________________ Second GRA Timer T23 1 min __________________________________________________________________ Continuity tone timer T24 2 s __________________________________________________________________ CCR timing timer T25 1-10 s __________________________________________________________________ CCR response timer T26 1-3 min __________________________________________________________________ CCR receive timer T27 4 min __________________________________________________________________ CQR timer T28 10 s __________________________________________________________________ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Tableau B-4/Q.764 [T7.764], p. 7 H.T. [1T8.764] TABLE B-5B/FQ.764 Primitives ____________________________________________________________________________________________ Primitive ISDN-UP message Interface ____________________________________________________________________________________________ SETUP | | | | | | REL, RLC { RELEASE REQ UEST IND ICATION RESP ONSE CONF IRMATION } Interface between CC and CPC } IAM ANM, CON | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | RESET { IND ICATION RESP ONSE } RSC, RLC GRS, GRA ____________________________________________________________________________________________ FORWARD TRANSFER { REQ UEST IND ICATION } FOT PROC ACM (Other) ALERT CPG, ACM (Subscriber free) INFO SAM PROG | ua) { CPG, ACM (Interworking, Q.931 progress indicator) } IBI | ub) { CPG (In-band information) ACM (In-band information } SUSPENDED SUS RESUMED RES ____________________________________________________________________________________________ BLOCKING { REQ UEST IND ICATION RESP ONSE CONF IRMATION } BLO, BLA CGB, CGBA { Interface between CC and CSC } UNBLOCKING UBL, UBA CGU, CGUA CCT GROUP QUERY CQM, CQR STOP | uc) { REQ UEST CONF IRMATION } - CONTINUITY RECHECK CCR RESET GRS, GRA RSC, RLC ____________________________________________________________________________________________ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Tableau B-5/Q.764 [1T8.764], p. 8 H.T. [2T8.764] TABLE B-5B/FQ.764 (cont.) ___________________________________________________________________________________________ Primitive ISDN-UP message Interface ___________________________________________________________________________________________ CALL FAILURE | uc) Interface between CC and CPC } REATTEMPT | uc) IND ICATION - } { CONTINUITY REPORT { REQ UEST IND ICATION } COT ___________________________________________________________________________________________ Tableau B-5/Q.764 [2T8.764], p. 9 Figure B-4/Q.764, (N), p. 10 Figure B-5/Q.764, (N), p. 11 Figure B-6/Q.764, (N), p. 12 Figure B-7/Q.764, (N), p. 13 Figure B-8/Q.764, (N), p. 14 Figure B-9/Q.764, (N), p. 15 Figure B-10/Q.764, (N), p. 16 Figure B-11/Q.764, (N), p. 17 Figure B-12/Q.764, (N), p. 18 Figure B-13/Q.764, (N), p. 19 Figure B-14/Q.764, (N), p. 20 Figure B-15/Q.764, (N), p. 21 Figure B-16/Q.764, (N), p. 22 Figure B-17/Q.764, (N), p. 23 Figure B-18/Q.764, (N), p. 24 Figure B-19/Q.764, (N), p. 25 Figure B-20/Q.764 (feuillet 1 sur 2), (N), p. 26 Figure B-20/Q.764 (feuillet 2 sur 2), (N), p. 27 Figure B-21/Q.764 (feuillet 1 sur 18), (N), p. 28 Figure B-21/Q.764 (feuillet 2 sur 18), (N), p. 29 Figure B-21/Q.764 (feuillet 3 sur 18), (N), p. 30 Figure B-21/Q.764 (feuillet 4 sur 18), (N), p. 31 Figure B-21/Q.764 (feuillet 5 sur 18), (N), p. 32 Figure B-21/Q.764 (feuillet 6 sur 18), (N), A L'ITALIENNE, p. 33 Figure B-21/Q.764 (feuillet 7 sur 18), (N), p. 34 Figure B-21/Q.764 (feuillet 8 sur 18), (N), p. 35 Figure B-21/Q.764 (feuillet 9 sur 18), (N), A L'ITALIENNE, p. 36 Figure B-21/Q.764 (feuillet 10 sur 18), (N), p. 37 Figure B-21/Q.764 (feuillet 11 sur 18), (N), p. 38 Figure B-21/Q.764 (feuillet 12 sur 18), (N), p. 39 Figure B-21/Q.764 (feuillet 13 sur 18), (N), A L'ITALIENNE, p. 40 Figure B-21/Q.764 (feuillet 14 sur 18), (N), A L'ITALIENNE, p. 41 Figure B-21/Q.764 (feuillet 15 sur 18), (N), p. 42 Figure B-21/Q.764 (feuillet 16 sur 18), (N), p. 43 Figure B-21/Q.764 (feuillet 17 sur 18), (N), p. 44 Figure B-21/Q.764 (feuillet 18 sur 18), (N), p. 45 ___________________________________________________________________________________________ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |