ABBREVIATIONS SPECIFIC TO SIGNALLING SYSTEM No. 71) English French Spanish Meaning ACB ACI SAP Access barred signal Table 3/Q.723 ACC RAE CAC Automatic congestion control information message Table 3/Q.723 ACM ACO MDC Address complete message Table 3/Q.723, Figure 3/Q.724 ADI ADI SDI 1) This list of abbreviations is basically the one appearing in Fascicle VI.6 of the Yellow Book, 1980. Study Group XI should bring this list up to date in the Study Period 1989-1992. Fascicle VI.9 - Abbreviations PAGE1 Address incomplete signal Table 3/Q.723, Figure 3/Q.724 AERM STEA MA Alignment error rate monitor Figures 7-9/Q.703 and 11-17/Q.703 ANC RAT RCT Answer signal, charge Table 3/Q.723, Figure 3/Q.724 ANN RST RST Answer signal, no charge Table 3/Q.723 ANU RSI RNC Answer signal, unqualified PAGE38 Fascicle VI.7 - Abbreviations Table 3/Q.723 BIB BIR BII Backward indicator bit Figures 3/Q.703, 13/Q.703 and 15/Q.703 BLA BLA ARB Blocking-acknowledgement signal Table 3/Q.723 BLO BLO BLO Blocking signal Table 3/Q.723 BSM DE MPE Backward set-up message Fascicle VI.9 - Abbreviations PAGE1 Table 3/Q.723 BSN NSR NSI Backward sequence number Figures 3/Q.703, 14/Q.703 and 16/Q.703 BSNR NSR-R NSIR Backward sequence number received Figures 7/Q.703, 13/Q.703, 14/Q.703, 16/Q.703 BSNT NSR-E NSIT Backward sequence number of next SU to be transmitted Figures 7-9/Q.703 and 13-16/Q.703, Figures 27 and 30/Q.704. CBA RCA ARS Changeback acknowledgement signal PAGE38 Fascicle VI.7 - Abbreviations Table 3/Q.704 CBD RCO ORS Changeback declaration signal Table 3/Q.704 CBK RAC COL Clear-back signal Table 3/Q.723, Figure 3/Q.724 Fascicle VI.9 - Abbreviations PAGE1 English French Spanish Meaning CCF CCN FCO Continuity-failure signal Table 3/Q.723 CCI CCE PCL Continuity check incoming Recommendation Q.724, S 7.3, Figures 3/Q.724, 5/Q.724 CCL RAD LALN Calling party clear signal Table 3/Q.723 CCM SC MSC Circuit supervision message PAGE38 Fascicle VI.7 - Abbreviations Table 3/Q.723 CCO CCS PCS Continuity-check outgoing Recommendation Q.723, S 7.3, Figures 3/Q.724, 4/Q.724 CCR CCD PPC Continuity-check-request signal Table 3/Q.723, Figures 2/Q.724, 3/Q.724, 6/Q.724 and 7/Q.724 CCS CS SCC Common channel signalling Recommendation Q.701, S 1.1 CFL ECH SLI Call-failure signal Fascicle VI.9 - Abbreviations PAGE1 Table 3/Q.723, Figure 3/Q.724 CGC EFC CHC Circuit-group-congestion Table 3/Q.723, Figure 3/Q.724 CHG TAX MTA Charging message Table 3/Q.723 CHM PR MPA Changeover and changeback messages Table 1/Q.704 CIC CIC CIC Circuit identification code PAGE38 Fascicle VI.7 - Abbreviations Recommendation Q.704, S 15, Recommendation Q.723, S 2.2.1 CIR IDD PIL Calling-line-identity-request signal Table 3/Q.723 CK CRT BCE Check bits Figure 3/Q.703 CLF FIN FIN Clear-forward signal Table 3/Q.723, Figures 3/Q.724, 6/Q.724, 7/Q.724 CNM GRC GRC Circuit network management message group CNP CLI CIM Fascicle VI.9 - Abbreviations PAGE1 Connection-not-possible signal Table 1/Q.704 CNS CLN CIN Connection-not-successful signal Table 1/Q.704 COA PCA APR Changeover acknowledgement signal Table 1/Q.704 COO PCO OPR Changeover order signal Table 1/Q.704 COT CCP CON Continuity signal PAGE38 Fascicle VI.7 - Abbreviations Table 3/Q.723, Figure 3/Q.724 Fascicle VI.9 - Abbreviations PAGE1 English French Spanish Meaning CPC STA CTL Call processing control Recommendation Q.724, S 10.2, Figures 1-7/Q.724 CRI CRE RPL Continuity recheck incoming Recommendation Q.724, S 15.1, Figures 1/Q.724, 2/Q.724, 3/Q.724, 6/Q.724, 7/Q.724 CRO CRS RPS Continuity-recheck outgoing Recommendation Q.724, S 15.1, Figures 1-3/Q.724, 6/Q.724 CSM SA MSL Call supervision message PAGE38 Fascicle VI.7 - Abbreviations Table 3/Q.723 CSS CLR SCF Connection-successful signal Table 1/Q.704 DAEDR DAD-R DADR Delimitation, alignment, error detection (reception) Figures 7/Q.703, 9/Q.703, 11/Q.703, 14/Q.703, 16/Q.703, 17/Q.703, 18/Q.703 DAEDT DAD-E DADT Delimitation, alignment, error detection (transmitting) Figures 12/Q.703, 13/Q.703, 15/Q.703 DCE ETCD ETCD Data circuit terminating equipment Fascicle VI.9 - Abbreviations PAGE1 Figure 1/Q.702 DLC CLO CED Signalling-data-link-connection-order signal Table 1/Q.704 DLM CL MED Signalling-data-link-connection-order message Table 1/Q.704 DPC CPD CPD Destination point code Recommendation Q.704, SS 2.2.3, 13.2, Figure 3/Q.704, 14/Q.704, 26/Q.704, Recommendation Q.706, S 3, Recommendation Q.723, S 2.2.1 DPN CNN TDN Digital path not provided signal PAGE38 Fascicle VI.7 - Abbreviations Table 3/Q.723 DUP SSUD PUD Data user part Recommendation Q.701, S 2.1, Figure 2/Q.701 ECA PUA AER Emergency changeover acknowledgement signal Table 1/Q.704 ECM PU MEP Emergency changeover message Table 1/Q.704 ECO PUO PER Emergency changeover order signal Fascicle VI.9 - Abbreviations PAGE1 Table 1/Q.704 EUM EXT IAL Extended-unsuccessful-backward set-up information message indication Table 3/Q.723 F F BAN Flag Figure 3/Q.703 PAGE38 Fascicle VI.7 - Abbreviations English French Spanish Meaning FAM AD MDA Forward-address message Table 3/Q.723 FCM CF MCF Signalling traffic flow control messages Table 1/Q.704 FDM MRF MDF Frequency division multiplex Recommendation Q.723, S 2.2.3, Recommendation Q.724, S 9 FIB BIA BID Forward indicator bit Fascicle VI.9 - Abbreviations PAGE1 Figures 3/Q.703, 13/Q.703, 15/Q.703 FISU TSR USR Fill-in signal unit Figures 7/Q.703, 8/Q.703, 13-16/Q.703 FOT IOP INT Forward-transfer signal Table 3/Q.723 FSM EA MEL Forward set-up message Table 3/Q.723 FSN NSA NSD Forward sequence number PAGE38 Fascicle VI.7 - Abbreviations Figures 3/Q.703, 13/Q.703 GRA RZA ARG Circuit group reset-acknowledgement message Table 3/Q.723 GRM SGC MSG Circuit group supervision message Table 3/Q.723 GRQ DEG MPG General request message GRS RZG MRG Circuit group reset message Table 3/Q.723 GSM ING Fascicle VI.9 - Abbreviations PAGE1 MEG General forward setup information message HBA BHA ABGSF Hardware failure oriented group blocking-acknowledgement message Table 3/Q.723 HGB BLH BGSF Hardware failure oriented group blocking message Table 3/Q.723 HGU DBH DGSF Hardware failure oriented group unblocking message Table 3/Q.723 HUA DHA ADGSF Hardware failure oriented group unblocking acknowledgement message PAGE38 Fascicle VI.7 - Abbreviations Table 3/Q.723 HMDC ODC HDCM Message discrimination Recommendation Q.704, S 2, Figures 23-26/Q.704 HMDT ODT HDTM Message distribution Recommendation Q.704, S 2, Figures 23-25/Q.704, 28/Q.704, 30/Q.704, 31/Q.704, 42/Q.704, 44-46/Q.704, 2/Q.707 HMRT OAC HENM Message routing Recommendation Q.704, S 2, Figures 23/Q.704, 24/Q.704, 26/Q.704, 27/Q.704, 30/Q.704, 31/Q.704, 32/Q.704, 33/Q.704, 42/Q.704, 44/Q.704, 45/Q.704, 46/Q.704, 2/Q.707 Fascicle VI.9 - Abbreviations PAGE1 English French Spanish Meaning HO HO EO Heading code Recommendation Q.704, S 15.3, Figure 16/Q.704, Recommendation Q.707, S 5.3, Figure 1/Q.707, Recommendation Q.723, SS 3.1 and 3.2 H1 H1 E1 Heading code Recommendation Q.704, S 15.3, Figure 16/Q.704, Recommendation Q.723, S 3.1 IAC CAI CAI Initial alignment control Figures 8/Q.703, 9/Q.703, 13-17/Q.703 IAI MIS MIA Initial address message with additional PAGE38 Fascicle VI.7 - Abbreviations information Table 3/Q.723 IAM MIA MID Initial address message Table 3/Q.723, Figures 3/Q.724, 6/Q.724 ISDN-UP SSUR PU-RDSI ISDN User Part (ISUP) Recommendations Q.700 and Q.761 to Q.764 ISP PSI PSI International signalling point Recommendation Q.705, S 3, Figure 1/Q.705 L1 N1 N1 Level 1 Fascicle VI.9 - Abbreviations PAGE1 Figures 12/Q.703, 35/Q.704, 38-40/Q.704 L2 N2 N2 Level 2 Figures 8/Q.703, 9/Q.703, 12/Q.703, 13/Q.703, 15/Q.703, 23/Q.704, 24/Q.704, 26/Q.704, 27/Q.704, 30/Q.704, 35/Q.704, 37/Q.704 L3 N3 N3 Level 3 Figures 8/Q.703, 9/Q.704, 13/Q.703, 15/Q.703, 23/Q.704, 24/Q.704, 26/Q.704, 30/Q.704, 31/Q.704, 34/Q.704, 35/Q.704, 37/Q.704, 38/Q.704, 39/Q.704 L4 N4 N4 Level 4 Figures 23/Q.704, 25-27/Q.704, 34/Q.704 LI INL IL Length indicator PAGE38 Fascicle VI.7 - Abbreviations Recommendation Q.703, S 2.2, Figure 3/Q.703 LLSC GCSF CCE Link set control Figures 29/Q.704, 35-37/Q.704 LOS LHS LFS Line-out-of-service signal Table 3/Q.723, Figure 3/Q.724 LSAC GCSA CAE Signalling link activity control Recommendation Q.704, S 12.6, Figures 28-30/Q.704, 35-41/Q.704 LSC SET CEE Link state control Fascicle VI.9 - Abbreviations PAGE1 Figures 7-10/Q.703, 13-18/Q.703, Recommendation Q.704, S 14.6, Figure 41/Q.704 LSDA GCAL AED Signalling data link allocation Recommendation Q.704, S 12.6, Figures 35/Q.704, 37-40/Q.704, 42/Q.704 PAGE38 Fascicle VI.7 - Abbreviations English French Spanish Meaning LSLA GCAC AES Signalling link activation Recommendation Q.704, S 12.6, Figures 35/Q.704, 37/Q.704, 38/Q.704, 41/Q.704, 42/Q.704 LSLD GCDA DES Signalling link deactivation Recommendation Q.704, S 12.6, Figures 35/Q.704, 37/Q.704, 40/Q.704, 41/Q.704, 42/Q.704 LSLR GCRE RES Signalling link restoration Recommendation Q.704, S 12.6, Figures 35/Q.704, 37/Q.704, 39/Q.704, 41/Q.704, 42/Q.704 LSSU TSE UEE Link status signal units Fascicle VI.9 - Abbreviations PAGE1 Figures 13-16/Q.703 LSTA GCAT ATS Signalling terminal allocation Recommendation Q.704, S 12.6, Figures 35/Q.704, 38/Q.704, 39/Q.704, 40/Q.704, 41/Q.704 MBA BMA ABGM Maintenance oriented group-blocking-acknowledgement Table 3/Q.723 MGB BLM BGM Maintenance oriented group blocking message Table 3/Q.723 MGMT GES SGE Management system PAGE38 Fascicle VI.7 - Abbreviations Figures 8/Q.703, 27/Q.704, 28/Q.704, 35-37/Q.704, 2/Q.707 MGU DBM DGM Maintenance oriented group unblocking message Table 3/Q.723 MPR INU PIMM Misdialled trunk prefix Table 3/Q.723 MSU TSM USM Message signal unit Recommendation Q.701, S 2.3, Figures 7/Q.703, 8/Q.703, 14/Q.703, 15/Q.703, 16/Q.703 MTP SSTM PTM Message transfer part Fascicle VI.9 - Abbreviations PAGE1 Recommendation Q.701, S 2.1, Recommendation Q.721, S 1 MUA DMA ADGM Maintenance oriented group unblocking-acknowledgement message Table 3/Q.723 NACK ACN RN Negative acknowledgement Figures 7/Q.703, 13/Q.703, 14/Q.703 NNC ERN CRN National-network-congestion signal Table 3/Q.723, Figure 3/Q.724 NSP PSN PSN National signalling point PAGE38 Fascicle VI.7 - Abbreviations Recommendation Q.705, S 3, Figure 1/Q.705 OMAP SSEM POMA Operation, Administration and Maintenance Part Recommendations Q.700 and Q.795 OPC CPO CPO Originating point code Recommendation Q.704, SS 2.2.3 and 13.2, Figures 3/Q.704 and 14/Q.704, Recommendation Q.706, S 3, Recommendation Q.723, S 2.2.1 Fascicle VI.9 - Abbreviations PAGE1 English French Spanish Meaning PCM MIC MIC Pulse code modulation Recommendation Q.702, S 5.3 PCR RCP RCP Preventive cyclic retransmission Tables 1/Q.706, 2/Q.706 POC SIP CIP Processor outage control Figures 8/Q.703, 10/Q.703 RAN NRP RRE Reanswer signal PAGE38 Fascicle VI.7 - Abbreviations Table 3/Q.723, Figure 3/Q.724 RC REC CR Reception control Figures 8/Q.703, 9/Q.703, 11/Q.703, 13-16/Q.703 RLG LIG LGU Release-guard signal Table 3/Q.723, Figures 2/Q.724, 3/Q.724, 6/Q.724, 7/Q.724 RSC RZC RCI Reseat-circuit signal Table 3/Q.723 RSM TR MPR Signalling-route-set-test message Fascicle VI.9 - Abbreviations PAGE1 Table 1/Q.704 RSRT GRTF CPC Signalling route set test control Recommendation Q.704, S 13.5, Figures 23/Q.704, 29/Q.704, 43-46/Q.704 RST TRS PRS Signalling-route-set-test signal Table 1/Q.704 RTAC GRTA CTA Transfer allowed control Recommendation Q.704, S 13.3, Figures 29/Q.704, 33/Q.704, 37/Q.704, 43/Q.704, 45/Q.704, 46/Q.704 RTB TRT MTR Retransmission buffer PAGE38 Fascicle VI.7 - Abbreviations Figures 7/Q.703, 13/Q.703, 15/Q.703 RTPC GRTI CTP Transfer prohibited control Recommendation Q.704, S 13.2, Figures 26/Q.704, 29/Q.704, 32/Q.704, 43/Q.704, 44/Q.704, 46/Q.704 SAM MSA MSD Subsequent-address message Table 3/Q.723, Figure 3/Q.724 SAO MSS SDU Subsequent-address message with one signal Table 3/Q.723 SBA BSA ABGSL Software generated group blocking-acknowledgement message Fascicle VI.9 - Abbreviations PAGE1 Table 3/Q.723 SBM SE MEC Successful-backward-set-up information message Table 3/Q.723 SCCP SSCS PCCS Signalling Connection Control Part Recommendations Q.700, Q.711-Q.714 and Q.716 SDL LDS LED Functional specification and description language Recommendations Q.703, S 12, Q.704, S 6, Q.707, Recommendations Q.714, Q.724, Q.764, Q.774 PAGE38 Fascicle VI.7 - Abbreviations English French Spanish Meaning SEC EEC CEC Switching-equipment-congestion signal Table 3/Q.723, Figure 3/Q.724 SF ETC CE Status field Figure 3/Q.703 SGB BLS BGSL Software generated group blocking message Recommendation Q.723, Table 3/Q.723 SGU DBS DGSL Software generated group unblocking message Fascicle VI.9 - Abbreviations PAGE1 Recommendation Q.723, Table 3/Q.723 SI INS IS Service indicator Recommendation Q.704, S 14 SIE ETAU IAE Status indication "emergency terminal status" Recommendation Q.703, SS 7.2, 7.3 and 10.1.3, Figures 2/Q.703, 4/Q.703, 7-9/Q.703, 13-16/Q.703 SIF INF CIS Signal information field Figure 3/Q.703 SIN ETAN IAN Status indication "normal terminal status" PAGE38 Fascicle VI.7 - Abbreviations Recommendation Q.703, SS 7.2, 7.3 and 10.1.3, Figures 2/Q.703, 4/Q.703, 7-9/Q.703, 13-16/Q.703 SIO SER OIS Service information octet Figure 3/Q.703, Recommendation Q.723, S 1.2 SIO2) ETAP IFA Status indication "out of alignment" Recommendation Q.703, SS 7.2, 7.3 and 10.1.3, Figures 2/Q.703, 4/Q.703, 7-9/Q.703, 13-16/Q.703 SIOS ETHS IFS Status indication "out of service" Recommendation Q.703, SS 7.2, 7.3 and 10.1.3, Figures 2/Q.703, 4/Q.703, 7-9/Q.703, 13-16/Q.703 SIPO ETIP IIP Status indication "processor outage" 2) In English, another abbreviation will have to be found for status indication "out of alignment", since the abbreviation SIO is already used for service information octet. Fascicle VI.9 - Abbreviations PAGE1 Recommendation Q.703, S 10.1.3, Figures 2/Q.703, 7/Q.703, 8/Q.703, 13-16/Q.703 SLC COC CES Signalling link code Recommendation Q.704, S 15, Figure 14/Q.704 SLM GCS GES Signalling link management Recommendation Q.704, SS 12.1 and 12.6, Figures 23/Q.704, 25/Q.704, 26/Q.704, 27/Q.704, 29/Q.703 SLS SCS SES Signalling link selection code Recommendation Q.704, S 2.2.4, Figures 3/Q.704, 4/Q.704, 26/Q.704, A-3.1/Q.705 SLTA ESCA AMPS Signalling link test message acknowledgement SLTM ESCO MPES PAGE38 Fascicle VI.7 - Abbreviations Signalling link test message Figure 2/Q.707 Fascicle VI.9 - Abbreviations PAGE1 English French Spanish Meaning SMH OMS TMS Signalling message handling Recommendation Q.704, S 2, Figures 23/Q.704, 43/Q.704 SP PS PS Signalling point Figures 8/Q.704, 23/Q.704, 24/Q.704, 26/Q.704, 27/Q.704, 30/Q.704, 31/Q.704, 42-44/Q.704 SPRC CPS CPS Signalling procedure control Recommendation Q.724, S 10.1, Figures 1-7/Q.724 SRM GRS GRS Signalling route management PAGE38 Fascicle VI.7 - Abbreviations Recommendation Q.704, S 13, Figures 23/Q.704, 25-27/Q.704, 43/Q.704 SSB OCC ABO Subscriber-busy signal (electrical) Table 3/Q.723, Figure 3/Q.724 SSF DSS CSS Sub-service field Recommendation Q.704, S 13.1.1, Recommendation Q.723, S 1.2 SST TSI TIE Send-special-information-tone signal Figures 1-7/Q.724 ST ST SFN End-of-pulsing signal Fascicle VI.9 - Abbreviations PAGE1 Recommendation Q.724, S 1.3 STLC ESC CPES Signalling link test control Figures 25/Q.704, 26/Q.704, 2/Q.707 STM GTS GTS Signalling traffic management Recommendation Q.704, S 4, Figures 23/Q.704, 25-27/Q.704, 30/Q.704, 35/Q.704, 39/Q.704, 43/Q.704 STP PTS PTS Signalling transfer point Figure 4/Q.701, Recommendation Q.705, S 3, Figures A-1/Q.705, A-2/Q.705, Recommendation Q.706, S 4.3.3, Table 3/Q.706 SU TS US Signal unit PAGE38 Fascicle VI.7 - Abbreviations Figures 2/Q.703, 7/Q.703 SUA DSA ADGSL Software generated group unblocking-acknowledgement messages Table 3/Q.723 SUERM STTS MUS Signal unit error rate monitor Figures 7/Q.703, 8/Q.703, 11/Q.703, 18/Q.703 SUM SEE ESNC Sample unsuccessful backward setup information message Recommendation Q.723, S 3.7.1 TB TEM MT Transmission buffer Fascicle VI.9 - Abbreviations PAGE1 Figures 7/Q.703, 13/Q.703, 15/Q.703 TC GT CT Transaction Capabilities Recommendations Q.700 and Q.771-Q.775 TCAP SSGT PACT Transaction Capabilities Application Part Recommendations Q.700 and Q.771-Q.775. TCBC GTCN TCRS Changeback control Recommendation Q.704, S 6, Figures 27-29/Q.704, 31/Q.704 PAGE38 Fascicle VI.7 - Abbreviations English French Spanish Meaning TCOC GTCS TCER Changeover control Recommendation Q.704, S 5, Figures 27-30/Q.704, 37/Q.704 TCRC GTRN TCRC Controlled rerouting control Recommendation Q.704, S 8, Figures 27/Q.704, 29/Q.704, 33/Q.704, 45/Q.704 TFA TAO TRA Transfer-allowed signal Table 1/Q.704 TFM TF MTR Transfer-prohibited and transfer-allowed Fascicle VI.9 - Abbreviations PAGE1 messages Table 1/Q.704 TFP TIO PTR Transfer-prohibited signal Table 1/Q.704 TFRC GTRS TCRF Forced rerouting control Recommendation Q.704, S 7, Figures 27/Q.704, 29/Q.704, 32/Q.704 TLAC GTSD TCDE Link availability control Recommendation Q.704, Figures 27-31/Q.704, 37/Q.704 TSFC GTFX CFTS Signalling traffic flow control PAGE38 Fascicle VI.7 - Abbreviations Figures 27/Q.704, 29/Q.704, 34/Q.704 TSRC GTAC CEN Signalling routing control Recommendation Q.704, Figures 27-34/Q.704, 36/Q.704, 37/Q.704, 44-46/Q.704 TUP SSUT PUT Telephone user part Recommendation Q.701, S 2.1, Figure 2/Q.701, Recommendation Q.721, S 1 TXC EMI CT Transmission control Figures 8/Q.703, 9/Q.703, 12-16/Q.703 UBA DBA ARD Unblocking-acknowledgement signal Fascicle VI.9 - Abbreviations PAGE1 Table 3/Q.723 UBL DBO DBL Unblocking signal Table 3/Q.723 UBM EE MEI Unsuccessful-backward-set-up-information message Table 3/Q.723 UNN NNU NNA Unallocated-national-number signal Table 3/Q.723, Figure 3/Q.724 UP SSU PU User part PAGE38 Fascicle VI.7 - Abbreviations Figure 2/Q.704 Fascicle VI.9 - Abbreviations PAGE1