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ITU-T Q-Series Recommendations

(last updated: 30-Oct-2000 13:01)

Q Series: Switching and Signalling

Signalling in the International Manual Service

Q.1 (11/88)
Signal receivers for manual working.
Q.2 (11/88)
Signal receivers for automatic and semi-automatic working, used for manual working.

Basic Recommendations

Q.4 (11/88)
Automatic switching functions for use in national networks.
Q.5 (11/88)
Advantages of semi-automatic service in the international telephone service.
Q.6 (11/88)
Advantages of international automatic working.
Q.7 (11/80)
Signalling systems to be used for international automatic and semi-automatic telephone working.
Q.8 (11/88)
Signalling systems to be used for international manual and automatic working on analogue leased circuits.
Q.9 (11/88)
Vocabulary of switching and signalling terms.

Numbering Plan and Dialling Procedures in the International Service

Q.11 (1988)
Numbering plan for the international telephone service.
Q.11 ter (11/88) (same as E.165)
Timetable for coordinated implementation of the full capability of the numbering plan for the ISDN era (Recommendation E.164).

Routing Plan for International Service

Q.12 (11/88)
Overflow - alternative routing - rerouting - automatic repeat attempt.
Q.14 (11/88)
Means to control the number of satellite links in an international telephone connection.

General Recommendations Relative to Signalling and Switching Systems

Q.20 (11/88)
Comparative advantages of "in-band" and "out-band" systems.
Q.21 (11/88)
Systems recommended for out-band signalling.
Q.22 (11/88)
Frequencies to be used for in-band signalling.
Q.23 (11/88)
Technical features of push-button telephone sets.
Q.24 (11/88)
Multifrequency push-button signal reception.
Q.25 (11/88)
Splitting arrangements and signal recognition times in "in-band" signalling systems.
Q.26 (11/88)
Direct access to the international network from the national network.
Q.27 (11/88)
Transmission of the answer signal.
Q.28 (11/88)
Determination of the moment of the called subscriber's answer in the automatic service.
Q.29 (11/88)
Causes of noise and ways of reducing noise in telephone exchanges.
Q.30 (11/88)
Improving the reliability of contacts in speech circuits.
Q.31 (11/88)
Noise in a national 4-wire automatic exchange.
Q.32 (11/88)
Reduction of the risk of instability by switching means.
Q.33 (11/88)
Protection against the effects of faulty transmission on groups of circuits.

Tones for Use in National Signalling Systems

Q.35 (03/98) (same as E.180)
Technical characteristics of tones for the telephone service.

General Characteristics for International Telephone Connections and Circuits

Q.44 (11/88)
Attenuation distortion.
Q.45 (10/84)
Transmission characteristics of an analogue international exchange.
Q.45 bis (11/88)
Transmission characteristics of an analogue international exchange.

Signalling for Satellite Systems

Q.48 (11/88)
Demand assignment signalling systems.

Signalling for Circuit Multiplication Equipment

Q.50 (06/97)
Signalling between circuit multiplication equipments (CME) and international switching centres (ISC).

Functions and Information Flows for Services in the ISDN - Methodology

Q.65 (06/00)
Stage 2 of the method for the characterization of services supported by an ISDN.

Basic Services

Q.68 (03/93)
Overview of methodology for developing management services.
Q.71 (03/93)
ISDN circuit mode switched bearer services.
Q.72 (03/93)
Stage 2 description for packet mode services.
Q.76 (02/95)
Service procedures for Universal Personal Telecommunication - Functional modelling and information flows.

Supplementary Services

Q.80 (11/88)
Introduction to stage 2 service descriptions for supplementary services.
Q.81
Stage 2 description for number identification supplementary services.
Q.81.1 (11/88)
Direct dialling-in.
Q.81.2 (02/92)
Multiple subscriber number.
Q.81.3 (09/91)
Calling line identification presentation (CLIP) and calling line identification restriction (CLIR).
Q.81.5 (09/91)
Connected line identification, presentation and restriction (COLP) and (COLR).
Q81.7 (06/97)
Malicious call identification.
Q.81.8 (02/92)
Sub-addressing (SUB).
Q.82
Stage 2 description for call offering supplementary services.
Q.82.1 (11/88)
Call transfer.
Q.82.2 (03/93)
Call forwarding.
Q.82.3 (03/93)
Call deflection.
Q.82.4 (11/88)
Line hunting.
Q.82.7 (07/96)
Explicit call transfer.
Q.83
Stage 2 description for call completion supplementary services.
Q.83.1 (09/91)
Call waiting (CW).
Q.83.2 (02/92)
Call hold.
Q.83.3 (11/88)
Completion of call to busy subscriber.
Q.83.4 (09/91)
Terminal portability.
Q.84
Stage 2 description for multiparty supplementary services.
Q.84.1 (03/93)
Conference calling (CONF).
Q.84.2 (10/95)
Three-party service.
Q.85
Stage 2 description for community of interest supplementary services.
Q.85.1 (02/92)
Closed user group.
Q.85.3 (02/92)
Multi-level precedence and preemption (MLPP).
Q.85.6 (02/95) + Annex A (07/96)
Global Virtual Network Service (GVNS).
Q.86
Stage 2 description for charging supplementary services.
Q.86.1 (11/88)
Credit card call.
Q.86.2 (10/95)
Advice of charge (AOC).
Q.86.3 (03/93)
Reverse Charging (REV).
Q.86.4 (06/97)
International Freephone Service (IFS).
Q.86.7 (10/95)
International Telecommunication Charge Card (ITCC).
Q.87
Stage 2 description for additional information transfer supplementary services.
Q.87.1 (03/93)
User-to-user signalling (UUS).
Q.87.2 (11/88)
User signalling bearer services.

Clauses Applicable to ITU-T Standard Systems - General Clauses

Q.101 (11/88)
Facilities provided in international semi-automatic working.
Q.102 (11/88)
Facilities provided in international automatic working.
Q.103 (11/88)
Numbering used.
Q.104 (11/88)
Language digit or discriminating digit.
Q.105 (11/88)
National (significant) number.
Q.106 (11/88)
The sending-finished signal.
Q.107 (11/88)
Standard sending sequence of forward address information.
Q.107 bis (03/93)
Analysis of forward address information for routing.
Q.108 (11/88)
One-way or both-way operation of international circuits.
Q.109 (11/88)
Transmission of the answer signal in international exchanges.

Transmission Clauses for Signalling

Q.110 (11/88)
General aspects of the utilization of standardized CCITT signalling systems on PCM links.
Q.112 (11/88)
Signal levels and signal receiver sensitivity.
Q.113 (11/88)
Connection of signal receivers in the circuit.
Q.114 (11/88)
Typical transmission requirements for signal senders and receivers.

Control of Echo Suppressors

Q.115 (03/93)
Control of echo suppressors - Control of echo suppressors and echo cancellers.

Abnormal Conditions

Q.116 (11/88)
Indication given to the outgoing operator or calling subscriber in case of an abnormal condition.
Q.117 (11/88)
Alarms for technical staff and arrangements in case of faults.
Q.118 (09/97)
Special release arrangements.
Q.118 bis (11/88)
Indication of congestion conditions at transit exchanges.

Specifications of Signalling System No. 4

Q.120 (11/88)
Definition and function of signals.
Q.121 (11/88)
Signal code.
Q.122 (11/88)
Signal sender and signal receiver.
Q.123 (11/88)
Signal receiver.
Q.124 (11/88)
Splitting arrangements.
Q.125 (11/88)
Speed of switching in international exchanges.
Q.126 (11/88)
Analysis and transfer of digital information.
Q.127 (11/88)
Release of registers.
Q.128 (11/88)
Switching to speech position.
Q.129 (11/88)
Maximum duration of a blocking signal.
Q.130 (11/88)
Special arrangements in case of failures in the sequence of signals.
Q.131 (11/88)
Abnormal release conditions of the outgoing register causing release of the international circuit.
Q.133 (11/88)
Numbering for access to automatic measuring and testing devices.
Q.134 (11/88)
Routine testing of equipment (local maintenance).
Q.135 (11/88)
Principles of rapid transmission testing equipment.
Q.136 (11/88)
Loop transmission measurements.
Q.137 (11/88)
Automatic testing equipment.
Q.138 (11/88)
Instruments for checking equipment and measuring signals.
Q.139 (11/88)
Manual testing.

Specifications of Signalling System No. 5

Q.140 (11/88)
Definition and function of signals.
Q.141 (03/93)
Signal code for line signalling.
Q.142 (11/88)
Double seizing with both-way operation.
Q.143 (11/88)
Line signal sender.
Q.144 (03/93)
Line signal receiver.
Q.145 (11/88)
Splitting arrangements.
Q.146 (11/88)
Speed of switching in international exchanges.
Q.151 (11/88)
Signal code for register signalling.
Q.152 (11/88)
End-of-Pulsing conditions - Register arrangements concerning ST (end-of-pulsing) signal.
Q.153 (11/88)
Multifrequency signal sender.
Q.154 (11/88)
Multifrequency signal receiver.
Q.155 (11/88)
Analysis of digital information for routing.
Q.156 (11/88)
Release of international registers.
Q.157 (11/88)
Switching to the speech position.
Q.161 (11/88)
General arrangements for manual testing.
Q.162 (11/88)
Routine testing of equipment (local maintenance).
Q.163 (11/88)
Manual testing.
Q.164 (11/88)
Testing equipment for checking equipment and signals.

Interworking of Signalling Systems No. 4 and No. 5

Q.180 (11/88)
Interworking of signalling systems No. 4 and No. 5.

Signalling System No. 6: Functional Description of the Signalling System

Q.251 (11/88)
General.
Q.252 (11/88)
Signal transfer time definitions.
Q.253 (11/88)
Association between signalling and speech networks.

Signalling System No. 6: Definition and Function of Signals

Q.254 (11/88)
Telephone signals.
Q.255 (11/88)
Signalling-system-control signals.
Q.256 (11/88)
Management signal.

Signalling System No. 6: Signal Unit Formats and Codes

Q.257 (11/88)
General.
Q.258 (11/88)
Telephone signals.
Q.259 (11/88)
Signalling-system-control signals.
Q.260 (11/88)
Management signals.

Signalling System No. 6: Signalling Procedures

Q.261 (11/88)
Normal call set-up.
Q.262 (11/88)
Analysis of digital information for routing.
Q.263 (11/88)
Double seizing with both-way operation.
Q.264 (11/88)
Potential for automatic repeat attempt and re-routing.
Q.265 (11/88)
Speed of switching and signal transfer in international exchanges.
Q.266 (11/88)
Blocking and unblocking sequences and control of quasi-associated signalling.
Q.267 (11/88)
Unreasonable and superfluous messages.
Q.268 (11/88)
Release of international connections and associated equipment.

Signalling System No. 6: Continuity Check of the Speech Path

Q.271 (11/88)
General.

Signalling System No. 6: Signalling Link

Q.272 (11/88)
Requirements for the signalling data link.
Q.273 (11/88)
Data transmission rate.
Q.274 (11/88)
Transmission methods. Modem and interface requirements.
Q.275 (11/88)
Data channel failure detection.
Q.276 (11/88)
Service dependability.
Q.277 (11/88)
Error control.
Q.278 (11/88)
Synchronization.
Q.279 (11/88)
Drift compensation.

Signalling System No. 6: Signal Traffic Characteristics

Q.285 (11/88)
Signal priority categories.
Q.286 (11/88)
Signalling channel loading and queueing delays.
Q.287 (11/88)
Signal transfer time requirements.

Signalling System No. 6: Security Arrangements

Q.291 (11/88)
General.
Q.292 (11/88)
Reserve facilities provided.
Q.293 (11/88)
Intervals at which security measures are to be invoked.

Signalling System No. 6: Testing and Maintenance

Q.295 (11/88)
Overall tests of Signalling System No. 6.
Q.296 (11/88)
Monitoring and maintenance of the common signalling channel.

Signalling System No. 6: Network Management

Q.297 (11/88)
Network management.

Interworking Between ITU-T Signalling System No. 6 and National Common

Q.300 (11/88)
Interworking between CCITT Signalling System No. 6 and national common channel signalling systems.

Definition and Function of Signals

Q.310 (11/88)
Definition and function of signals.

Line Signalling

Q.311 (11/88)
2600 Hz line signalling.
Q.312 (11/88)
2600 Hz line signal sender (transmitter).
Q.313 (11/88)
2600 Hz line signal receiving equipment.
Q.314 (11/88)
PCM line signalling.
Q.315 (11/88)
PCM line signal sender (transmitter).
Q.316 (11/88)
PCM line signal receiver.
Q.317 (11/88)
Further specification clauses relative to line signalling.
Q.318 (11/88)
Double seizing with both-way operation.
Q.319 (11/88)
Speed of switching in international exchanges.

Register Signalling

Q.320 (11/88)
Signal code for register signalling.
Q.321 (11/88)
End-of-pulsing conditions - Register arrangements concerning ST signal.
Q.322 (11/88)
Multifrequency signal sender.
Q.323 (11/88)
Multifrequency signal receiving equipment.
Q.324 (11/88)
Analysis of address information for routing.
Q.325 (11/88)
Release of registers.
Q.326 (11/88)
Switching to the speech position.

Testing Arrangements

Q.327 (11/88)
General arrangements.
Q.328 (11/88)
Routine testing of equipment (local maintenance).
Q.329 (11/88)
Manual testing.
Q.330 (11/88)
Automatic transmission and signalling testing.
Q.331 (11/88)
Test equipment for checking equipment and signals.

Interworking of Signalling System R1 with Other Standardized Systems

Q.332 (11/88)
Interworking.

Definition and Function of Signals

Q.400 (11/88)
Forward line signals.

Line Signalling, Analogue Version

Q.411 (11/88)
Line signalling code.
Q.412 (11/88)
Clauses for exchange line signalling equipment.
Q.414 (11/88)
Signal sender.
Q.415 (11/88)
Signal receiver.
Q.416 (11/88)
Interruption control.

Line Signalling, Digital Version

Q.421 (11/88)
Digital line signalling code.
Q.422 (11/88)
Clauses for exchange line signalling equipment.
Q.424 (11/88)
Protection against the effects of faulty transmission.
Q.430 (11/88)
Conversion between analogue and digital versions of System R2 line signalling.

Interregister Signalling

Q.440 (11/88)
General.
Q.441 (11/88)
Signalling code.
Q.442 (11/88)
Pulse transmission of backward signals A-3, A-4, A-6 or A-15. Multifrequency signalling equipment.
Q.450 (11/88)
General.
Q.451 (11/88)
Definitions.
Q.452 (11/88)
Requirements relating to transmission conditions.
Q.454 (11/88)
The sending part of the multifrequency signalling equipment.
Q.455 (11/88)
The receiving part of the multifrequency equipment. Range, speed and reliability of interregister signalling.
Q.457 (11/88)
Range of interregister signalling.
Q.458 (11/88)
Reliability of interregister signalling.

Signalling Procedures

Q.460 (11/88)
Normal call set-up procedures for international working.
Q.462 (11/88)
Signalling between the outgoing international R2 register and an incoming R2 register in an international exchange.
Q.463 (11/88)
Signalling between the outgoing international R2 register and an incoming R2 register in a national exchange in the destination country.
Q.464 (11/88)
Signalling between the outgoing international R2 register and the last incoming R2 register.
Q.465 (11/88)
Particular cases.
Q.466 (11/88)
Supervision and release of the call.
Q.468 (11/88)
Routing and numbering for international working. Termination of interregister signalling.
Q.470 (11/88)
At an incoming R2 register situated in a transit exchange.
Q.471 (11/88)
At the last incoming R2 register situated in the exchange to which the called subscriber is connected.
Q.472 (11/88)
At the last incoming R2 register situated in a transit exchange.
Q.473 (11/88)
Use of end-of-pulsing signal I-15 in international working.
Q.474 (11/88)
Use of group B signals.
Q.475 (11/88)
Normal release of outgoing and incoming R2 registers.
Q.476 (11/88)
Abnormal release of outgoing and incoming R2 registers.
Q.478 (11/88)
Relay and regeneration of R2 interregister signals by an outgoing R2 register in a transit exchange.
Q.479 (11/88)
Echo-suppressor control - Signalling requirements.
Q.480 (11/88)
Miscellaneous procedures.

Testing and Maintenance

Q.490 (11/88)
Testing and maintenance.

Introduction and Field of Application

Q.500 (11/88)
Digital local, combined, transit and international exchanges, introduction and field of application.

Exchange Interfaces, Functions and Connections

Q.511 (11/88)
Exchange interfaces towards other exchanges.
Q.512 (02/95)
Digital exchange interfaces for subscriber access.
Q.513 (03/93)
Digital exchange interfaces for operations, administration and maintenance.
Q.521 (03/93)
Digital exchange functions.
Q.522 (11/88)
Digital exchange connections, signalling and ancillary functions.

Design Objectives and Measurement

Q.541 (03/93)
Digital exchange design objectives - General.
Q.542 (03/93)
Digital exchange design objectives - Operations and maintenance.
Q.543 (03/93)
Digital exchange performance design objectives.
Q.544 (11/88)
Digital exchange measurements.

Transmission Characteristics

Q.551 (11/96)
Transmission characteristics of digital exchanges.
Q.552 (11/96)
Transmission characteristics at 2-wire analogue interfaces of digital exchanges.
Q.553 (11/96)
Transmission characteristics at 4-wire analogue interfaces of digital exchanges.
Q.554 (11/96)
Transmission characteristics at digital interfaces of digital exchanges.

Interworking of Signalling Systems - General Considerations

Q.601 (03/93)
Interworking of signalling systems - General.
Q.601 Annex A (03/93)
Interworking of signalling systems - Lists and meanings of FITEs, BITEs and SPITEs - Representation of information contents of signals of the signalling systems.
Q.601 Annex B (03/93)
Interworking of signalling systems - Narrative presentation of interworking.
Q.602 (03/93)
Interworking of signalling systems - Introduction.
Q.603 (11/88)
Events.
Q.604 (03/93)
Interworking of signalling systems - Information analysis tables.
Q.605 (11/88)
Drawing conventions.
Q.606 (11/88)
Logic procedures.
Q.607 (11/88)
Interworking requirements for new signalling systems.
Q.608 (11/88)
Miscellaneous interworking aspects.

Logic Procedures

Q.611 (11/88)
Logic procedures for incoming signalling system No. 4.
Q.612 (11/88)
Logic procedures for incoming signalling system No. 5.
Q.613 (11/88)
Logic procedures for incoming signalling system No. 6.
Q.614 (03/93)
Interworking of signalling systems - Logic procedures for incoming Signalling System No. 7 (TUP).
Q.615 (11/88)
Logic procedures for incoming signalling system R1.
Q.616 (11/88)
Logic procedures for incoming signalling system R2.
Q.617 (03/93)
Logic procedures for incoming signalling system No. 7 (ISUP).
Q.621 (11/88)
Logic procedures for outgoing signalling system No. 4.
Q.622 (11/88)
Logic procedures for outgoing signalling system No. 5.
Q.623 (11/88)
Logic procedures for outgoing signalling system No. 6.
Q.624 (03/93)
Interworking of signalling systems - Logic procedures for outgoing Signalling System No. 7 (TUP).
Q.625 (11/88)
Logic procedures for outgoing signalling system R1.
Q.626 (11/88)
Logic procedures for outgoing signalling system R2.
Q.627 (03/93)
Interworking of signalling systems - Logic procedures for outgoing Signalling System No. 7 (ISUP).
Q.634 (11/88)
Logic procedures for interworking of signalling system No. 4 to R2.
Q.642 (11/88)
Logic procedures for interworking of signalling system No. 5 to No. 6.
Q.643 (11/88)
Logic procedures for interworking of signalling system No. 5 to No. 7. (TUP)
Q.644 (11/88)
Logic procedures for interworking of signalling system No. 5 to R1.
Q.645 (11/88)
Logic procedures for interworking of signalling system No. 5 to R2.
Q.646 (03/93)
Interworking of signalling systems - Logic procedures for interworking of Signalling System No. 5 to Signalling System No. 7 (ISUP).
Q.652 (11/88)
Logic procedures for interworking of signalling system No. 6 to No. 5.
Q.653 (11/88)
Logic procedures for interworking of signalling system No. 6 to No. 7 (TUP).
Q.654 (11/88)
Logic procedures for interworking of signalling system No. 6 to R1.
Q.655 (11/88)
Logic procedures for interworking of signalling system No. 6 to R2.
Q.656 (03/93)
Interworking of signalling systems - Logic procedures for interworking of Signalling System No. 6 to Signalling System No. 7 (ISUP).
Q.662 (11/88)
Logic procedures for interworking of signalling system No. 7 (TUP) to No. 5.
Q.663 (11/88)
Logic procedures for interworking of signalling system No. 7 (TUP) to No. 6.
Q.664 (11/88)
Logic procedures for interworking of signalling system No. 7 (TUP) to No. 7 (TUP).
Q.665 (11/88)
Logic procedures for interworking of signalling system No. 7 (TUP) to R1.
Q.666 (11/88)
Logic procedures for interworking of signalling system No. 7 (TUP) to R2.
Q.667 (03/93)
Interworking of signalling systems - Logic procedures for interworking of Signalling System No. 7 (TUP) to Signalling System No. 7 (ISUP).
Q.671 (11/88)
Logic procedures for interworking of signalling system R1 to No. 5.
Q.672 (11/88)
Logic procedures for interworking of signalling system R1 to No. 6.
Q.673 (11/88)
Logic procedures for interworking of signalling system R1 to No. 7 (TUP).
Q.674 (11/88)
Logic procedures for interworking of signalling system R1 to R2.
Q.675 (03/93)
Interworking signalling systems - Logic procedures for interworking of Signalling System R1 to Signalling System No. 7 (ISUP).
Q.681 (11/88)
Logic procedures for interworking of signalling system R2 to No. 4.
Q.682 (11/88)
Logic procedures for interworking of signalling system R2 to No. 5.
Q.683 (11/88)
Logic procedures for interworking of signalling system R2 to No. 6.
Q.684 (11/88)
Logic procedures for interworking of signalling system R2 to No. 7 (TUP).
Q.685 (11/88)
Logic procedures for interworking of signalling system R2 to R1.
Q.686 (03/93)
Interworking of signalling systems - Logic procedures for interworking of Signalling System R2 to Signalling System No. 7 (ISUP).
Q.690 (03/93)
Interworking of signalling systems - Logic procedures for interworking of Signalling System No. 7 (ISUP) to No. 5.
Q.691 (03/93)
Interworking of signalling systems - Logic procedures for interworking of Signalling System No. 7 (ISUP) to No. 6.
Q.692 (03/93)
Interworking of signalling systems - Logic procedures for interworking of Signalling System No. 7 (ISUP) to No. 7 (TUP).
Q.694 (03/93)
Interworking of signalling systems - Logic procedures for interworking of signalling system No. 7 (ISUP) to R1.
Q.695 (03/93)
Interworking of signalling systems - Logic procedures for interworking of Signalling System No. 7 (ISUP) to R2.
Q.696 (06/97)
Interworking Between the Signalling System No. 7 ISDN User Part (ISUP) and Signalling Systems No. 5, R2 and Signalling System No. 7 TUP.

Interworking of Signalling Systems No. 7 and No. 6

Q.698 (03/93)
Interworking of Signalling System No. 7 ISUP, TUP and Signalling System No. 6 using arrow diagrams.

Interworking Between Digital Subscriber Signalling System No. 1 and

Q.699 (09/97)
Interworking between ISDN Access and Non-ISDN Access over ISDN User Part of Signalling System No. 7.
Q.699.1 (05/98)
Support of VPN Applications with PSS1 Information Flows.

Specifications of Signalling System No. 7 - General

Q.700 (03/93)
Introduction to CCITT Signalling System No. 7.

Message Transfer Part (MTP)

Q.701 (03/93)
Functional description of the message transfer part (MTP) of Signalling System No. 7.
Q.702 (11/88)
Signalling data link.
Q.703 (07/96)
Signalling link.
Q.704 (07/96)
Signalling network functions and messages.
Q.705 (03/93)
Signalling network structure.
Q.706 (03/93)
Message transfer part signalling performance.
Q.707 (11/88)
Testing and maintenance.
Q.708 (03/99)
Assignment Procedures for International Signalling Point Codes.
Q.709 (03/93)
Hypothetical signalling reference connection.

Simplified Message Transfer Part

Q.710 (11/88)
Simplified MTP version for small systems.

Signalling Connection Control Part (SCCP)

Q.711 (07/96)
Functional description of the Signalling Connection Control Part.
Q.712 (07/96)
Definition and function of SCCP messages.
Q.713 (07/96)
SCCP formats and codes.
Q.714 (07/96)
Signalling connection control part procedures.
Q.715 (07/96)
Signalling connection control part user guide.
Q.716 (03/93)
Signalling connection control part (SCCP) performance.

Telephone User Part (TUP)

Q.721 (11/88)
Functional description of the Signalling System No. 7 Telephone User Part (TUP).
Q.722 (11/88)
General function of telephone messages and signals.
Q.723 (11/88)
Formats and codes.
Q.724 (11/88)
Signalling procedures.
Q.725 (03/93)
Signalling performance in the telephone application.

ISDN Supplementary Services

Q.730 (12/99)
Signalling System No. 7 - ISDN supplementary services.
Q.731
Stage 3 description for number identification supplementary services using Signalling System No. 7.
Q.731.1 (07/96)
Direct-dialling-in (DDI).
Q.731.3 (03/93)
Calling line identification presentation (CLIP).
Q.731.4 (03/93)
Calling line identification restriction (CLIR).
Q.731.5 (03/93)
Connected line identification presentation (COLP).
Q.731.6 (03/93)
Connected line identification restriction (COLR).
Q.731.7 (06/97)
Malicious Call Identification (MCID).
Q.731.8 (02/92)
Sub-addressing (SUB).
Q.732
Stage 3 description for call offering supplementary services using Signalling System No. 7.
Q.732.2 (12/99)
Call diversion services: Call forwarding busy, Call forwarding no reply, Call forwarding unconditional, Call deflection.
Q.732.5 (12/99)
Stage 3 Description for Call Offering Supplementary Services Using Signalling System No. 7: Call Diversion Services.
Q.732.7 (07/96)
Stage 3 description for call offering supplementary services using Signalling System No. 7: Explicit Call Transfer.
Q.733
Stage 3 description for call completion supplementary services using Signalling System No. 7.
Q.733.1 (02/92)
Call waiting (CW).
Q.733.2 (03/93)
Call hold (HOLD).
Q.733.3 (06/97)
Completion of Calls to Busy Subscriber (CCBS).
Q.733.4 (03/93)
Terminal portability (TP).
Q.734 (03/93)
Stage 3 description for multiparty supplementary services using Signalling System No. 7.
Q.734.1 (03/93)
Conference calling.
Q.734.2 (07/96)
Three-party service.
Q.735
Stage 3 description for community of interest supplementary services using Signalling System No. 7.
Q.735.1 (03/93)
Closed user group (CUG).
Q.735.3 (03/93)
Multi-level precedence and preemption.
Q.735.6 (07/96)
Stage 3 description for community of interest supplementary services using Signalling System No. 7: Global Virtual Network Service (GVNS).
Q.736
Stage 3 description for charging supplementary services using Signalling System No. 7.
Q.736.1 (10/95)
International Telecommunication Charge Card (ITCC).
Q.736.3 (10/95)
Reverse charging (REV).
Q.737
Stage 3 description for additional information transfer supplementary services using Signalling System No. 7.
Q.737.1 (06/97)
User-to-user signalling (UUS).

Data User Part (DUP)

Q.741 (11/88) (same as X.61)
Signalling System No. 7 - Data user part.

Signalling System No. 7 Management

Q.750 (06/97)
Overview of Signalling System No. 7 management.
Q.751.1 (10/95)
Network element management model for the Message Transfer Part (MTP).
Q.751.2 (06/97)
Network Element Management Information Model for the Signalling Connection Control Part.
Q.751.3 (09/97)
Network Element Information Model for MTP Accounting.
Q.751.4 (05/98)
Network Element Information Model for SCCP Accounting and Accounting Verification.
Q.752 (06/97)
Monitoring and measurements for Signalling System No. 7 networks.
Q.753 (06/97)
Signalling System No. 7 management functions MRVT, SRVT and CVT and definition of the OMASE-user.
Q.754 (06/97)
Signalling System No. 7 management application service element (ASE) definitions.
Q.755 (03/93)
Signalling System No. 7 protocol tests.
Q.755.1 (05/98)
MTP Protocol Tester.
Q.755.2 (09/97)
Transaction Capabilities Test Responder.
Q.756 (06/97)
Guidebook to Operations, Maintenance and Administration Part (OMAP).

ISDN User Part (ISUP)

Q.761 (12/99)
ISDN User Part Functional Description.
Q.762 (03/93)
General function of messages and signals of the ISDN User Part of Signalling System No. 7.
Q.763 (09/97)
ISDN User Part Formats and Codes.
Q.764 (03/93) + Annex H (02/95)
ISDN user part signalling procedures.
Q.765 (06/00)
Application transport mechanism.
Q.765.1 (05/98)
Application transport mechanism - Support of VPN applications with PSS1 information flows.
Q.766 (03/93)
Performance objectives in the integrated services digital network application.
Q.767 (02/91)
Application of the ISDN user part of CCITT signalling system No. 7 for international ISDN interconnections.
Q.768 (10/95)
Signalling interface between an international switching centre (ISC) and an ISDN satellite subnetwork.
Q.769.1 (12/99)
Signalling System No. 7 - ISDN User Part Enhancements for the Support of Number Portability.

Transaction Capabilities Application Part (TCAP)

Q.771 (06/97)
Functional description of transaction capabilities.
Q.772 (06/97)
Transaction capabilities information element definitions.
Q.773 (06/97)
Transaction capabilities formats and encoding.
Q.774 (06/97)
Transaction capabilities procedures.
Q.775 (06/97)
Guidelines for using transaction capabilities.

Test Specification

Q.780 (10/95)
Signalling System No. 7 test specification general description.
Q.780-series Supplement 1 (10/95)
Signalling System No. 7 Testing and Planning Tools.
Q.781 (07/96)
MTP level 2 test specification.
Q.782 (07/96)
MTP level 3 test specification.
Q.783 (11/88)
TUP test specification.
Q.784 (02/91)
ISUP basic call test specification.
Q.784 Annex A (03/93)
TTCN version of Recommendation Q.784.
Q.784.1 (07/96)
ISUP basic call test specification: Validation and compatibility for ISUP'92 and Q.767 protocols.
Q.784.2 (06/97)
ISUP Basic Call Test Specification: Abstract Test Suite for ISUP'92 Basic Call Control Procedures.
Q.785 (09/91)
ISUP protocol test specification for supplementary services.
Q.785.2 (03/99)
ISUP'97 Supplementary Services - Test Suite Structure and Test Purposes (TSS & TP).
Q.786 (03/93)
SCCP test specification.
Q.787 (09/97)
Transaction Capabilities (Tc) test specification.
Q.788 (06/97)
User-network-interface to user-network-interface compatibility test specifications for ISDN, non-ISDN and undetermined accesses interworking over international ISUP.

Q3 Interface

Q.811 (06/97)
Lower layer protocol profiles for the Q3 interface.
Q.812 (03/93)
Upper layer protocol profiles for the Q3 interface.
Q.812 Ammendment 1 (03/99)
Additional X Interface Protocols for the Service Management Layer (SML).
Q.812 Appendix I (03/99)
Guidance on Using Allomorphic Management.
Q.813 (06/98)
Security Transformations Application Service Element for Remote Operations Service Element (STASE-ROSE).
Q.821 (02/00)
Stage 2 and stage 3 description for the Q3 interface - Alarm surveillance.
Q.822 (04/94)
Stage 1, stage 2 and stage 3 description for the Q3 interface - Performance management.
Q.823 (07/96)
Stage 2 and Stage 3 functional specifications for traffic management.
Q.823.1 (10/97)
Management Conformance Statement Proformas.
Q.824
Stages 2 and 3 description for the Q3 interface - Customer administration.
Q.824.0 (10/95)
Common information.
Q.824.1 (10/95)
Integrated Services Digital Network (ISDN) basic and primary rate access.
Q.824.2 (10/95)
Integrated Services Digital Network (ISDN) supplementary services.
Q.824.3 (10/95)
Integrated Services Digital Network (ISDN) optional user facilities.
Q.824.4 (10/95)
Integrated Services Digital Network (ISDN) teleservices.
Q.824.5 (10/97)
Configuration Management of V5 Interface Environments and Associated Customer Profiles.
Q.824.6 (06/98)
Broadband Switch Management.
Q.825 (06/98)
Specification of TMN Applications at the Q3 Interface: Call Detail Recording.
Q.831 (10/97)
Fault and Performance Management of V5 Interface Environments and Associated Customer Profiles.
Q.832.1 (06/98)
VB5.1 Management.
Q.832.2 (03/99)
VB5.2 Management.
Q.835 (03/99)
Line and Circuit Test Management of ISDN and Analogue Customer Accesses.

Digital Subscriber Signalling System No. 1 - General

Q.850 (05/98)
Usage of cause and location in the digital subscriber Signalling System No. 1 and the Signalling System No. 7 ISDN user part.

Data Link Layer

Q.920 (03/93) (same as I.440)
ISDN user-network interface data link layer - General aspects.
Q.921 (09/97) (same as I.441)
ISDN user-network interface - Data link layer specification.
Q.921 bis (03/93)
Abstract test suite for LAPD conformance testing.
Q.922 (02/92)
ISDN data link layer specification for frame mode bearer services.
Q.923 (02/95)
Specification of a synchronization and coordination function for the provision of the OSI connection-mode network service in an ISDN environment.

Network Layer

Q.930 (03/93) (same as I.450)
ISDN user-network interface layer 3 - General aspects.
Q.931 (05/98) (same as I.451)
ISDN user-network interface layer 3 specification for basic call control.
Q.931 bis (02/95)
PICS and abstract test suite for ISDN DSS 1 layer 3 - Circuit mode, basic call control conformance testing.
Q.932 (05/98) (same as I.452)
Generic procedures for the control of ISDN supplementary services.
Q.933 (10/95)
Signalling specification for frame mode switched and permanent virtual connection control and status monitoring.
Q.933 bis (10/95)
Abstract test suite - Signalling specification for frame mode basic call control conformance testing for permanent virtual connections (PVCs).
Q.939 (03/93)
Typical DSS 1 service indicator codings for ISDN telecommunications services.

User-Network Management

Q.940 (11/88)
ISDN user-network interface protocol for management - General aspects.
Q.941 (03/93)
ISDN user-network interface protocol profile for management.

Stage 3 Description for Supplementary Services Using DSS 1

Q.950 (06/00)
Supplementary services protocols, structure and general principles.
Q.951
Stage 3 description for number identification supplementary services using DSS 1.
Q.951.1 (02/92)
Direct-dialling-in (DDI).
Q.951.2 (02/92)
Multiple subscriber number (MSN).
Q.951.3 (03/93)
Calling line identification presentation.
Q.951.4 (03/93)
Calling line identification restriction.
Q.951.5 (03/93)
Connected line identification presentation.
Q.951.6 (03/93)
Connected line identification restriction.
Q.951.7 (06/97)
Malicious Call Identification (MCID).
Q.951.8 (02/92)
Sub-addressing (SUB).
Q.952 (03/93)
Stage 3 service description for call offering supplementary services using DSS 1 - Diversion supplementary services.
Q.952.7 (06/97)
Explicit Call Transfer (ECT).
Q.953
ISDN stage 3 description for call completion supplementary services using DSS 1.
Q.953.1 (02/92)
Call waiting.
Q.953.2 (03/93)
Call hold.
Q.953.3 (06/97)
Completion of Calls to Busy Subscribers (CCBS).
Q.953.4 (10/95)
Terminal Portability (TP).
Q.953.5 (12/99)
Call Completion on No Reply (CCNR).
Q.954
Stage 3 description for multiparty supplementary services using DSS 1.
Q.954.1 (03/93)
Conference calling.
Q.954.2 (10/95)
Three-party (3PTY).
Q.955
Stage 3 description for community of interest supplementary services using DSS 1.
Q.955.1 (02/92)
Closed user group.
Q.955.3 (03/93)
Multi-level precedence and preemption (MLPP).
Q.956 (10/95)
Stage 3 description for charging supplementary services using DSS 1.
Q.956.2 (10/95)
Advice of charge.
Q.956.3 (10/95)
Reverse charging.
Q.957
Stage 3 description for additional information transfer supplementary services using DSS 1.
Q.957.1 (07/96)
User-to-user signalling (UUS).

Public Land Mobile Network - General

Q.1000 (11/88)
Structure of the Q.1000-Series Recommendations for public land mobile networks.
Q.1001 (11/88)
General aspects of public land mobile networks.
Q.1002 (11/88)
Network functions.
Q.1003 (11/88)
Location registration procedures.
Q.1004 (11/88)
Location register restoration procedures.
Q.1005 (11/88)
Handover procedures.

Interworking with ISDN and PSTN

Q.1031 (11/88)
General signalling requirements on interworking between the ISDN or PSTN and the PLMN.
Q.1032 (11/88)
Signalling requirements relating to routing of calls to mobile subscribers.

Mobile Application Part

Q.1051 (1988)
Mobile Application Part.

Digital PLMN User-Network Interfaces

Q.1061 (11/88)
General aspects and principles relating to digital PLMN access signalling reference points.
Q.1062 (11/88)
Digital PLMN access signalling reference configurations.
Q.1063 (11/88)
Digital PLMN channel structures and access capabilities at the radio interface (Um reference point).

Interworking with Standard-A INMARSAT System

Q.1100 (03/93)
Structure of the Recommendations on the INMARSAT mobile satellite systems.
Q.1101 (11/88)
General requirements for the interworking of the terrestrial telephone network and INMARSAT Standard A system.
Q.1102 (11/88)
Interworking between Signalling System R2 and INMARSAT Standard A system.
Q.1103 (11/88)
Interworking between Signalling System No. 5 and INMARSAT Standard A system.

Interworking with Standard-B INMARSAT System

Q.1111 (03/93)
Interfaces between the INMARSAT Standard B system and the international public switched telephone network/ISDN.
Q.1112 (03/93)
Procedures for interworking between INMARSAT Standard-B system and the international public switched telephone network/ISDN.

Interworking with the INMARSAT Aeronautical Mobile-Satellite System

Q.1151 (03/93)
Interfaces for interworking between the INMARSAT aeronautical mobile-satellite system and the international public switched telephone network/ISDN.
Q.1152 (03/93)
Procedures for interworking between INMARSAT aeronautical mobile satellite system and the international public switched telephone network/ISDN.

Intelligent Network

Q.1200 (09/97)
Q-series intelligent network Recommendation structure.
Q.1201 (10/92) (same as I.312)
Principles of intelligent network architecture.
Q.1202 (09/97) (same as I.328)
Intelligent network - Service plane architecture.
Q.1203 (09/97) (same as I.329)
Intelligent network - Global functional plane architecture.
Q.1204 (03/93)
Intelligent network distributed functional plane architecture.
Q.1205 (03/93)
Intelligent network physical plane architecture.
Q.1208 (09/97)
General aspects of the intelligent network application protocol.
Q.1210 (10/95)
Q.121x-series Intelligent network Recommendation structure.
Q.1211 (03/93)
Introduction to intelligent network capability set 1.
Q.1213 (10/95)
Global functional plane for intelligent network CS-1.
Q.1214 (10/95)
Distributed functional plane for intelligent network CS-1.
Q.1215 (10/95)
Physical plane for intelligent network CS-1.
Q.1218 (10/95)
Interface Recommendation for intelligent network CS-1.
Q.1218 Addendum 1 (09/97)
Definition for Two New Contexts in the SDF Data Model.
Q.1219 (04/94)
Intelligent network user's guide for capability set 1.
Q.1219 Supplement 1 (09/97)
Supplement 1.
Q.1220 (09/97)
Q.1220-Series Intelligent Network Capability Set 2 Recommendation Structure.
Q.1221 (09/97)
Introduction to Intelligent Network Capability Set 2.
Q.1222 (09/97)
Service Plane for Intelligent Network Capability Set 2.
Q.1223 (09/97)
Global Functional Plane for Intelligent Network Capability Set 2.
Q.1224 (09/97)
Distributed Functional Plane for Intelligent Network Capability Set 2: Parts 1, 2, 3.
Q.1225 (09/97)
Physical Plane for Intelligent Network Capability Set 2.
Q.1228 (09/97)
Interface Recommendation for Intelligent Network Capability Set 2.
Q.1238.2 (06/00)
Q.1290 (05/98)
Glossary of terms used in the definition of intelligent networks.
Q.1300 (10/95)
Telecommunication applications for switches and computers (TASC) - General Overview.
Q.1301 (10/95)
Telecommunication applications for switches and computers (TASC) - TASC Architecture.
Q.1302 (10/95)
Telecommunication applications for switches and computers (TASC) - TASC functional services.
Q.1303 (10/95)
Telecommunication applications for switches and computers (TASC) - TASC Management: Architecture, methodology and requirements.
Q.1400 (03/93) + Addendum 1 (02/95)
Architecture framework for the development of signalling and OA&M protocols using OSI concepts
Q.1541 (05/98)
UPT Stage 2 for Service Set 1 on IN CS-1 - Procedures for Universal Personal Telecommunication: Functional Modelling and Information Flows.
Q.1551 (06/97)
Application of Intelligent Network Application Protocols (INAP) CS-1 for UPT Service Set 1.
Q.1600 (09/97)
Signalling System No. 7 - Interaction Between ISUP and INAP.
Q.1701 (03/99)
Framework for IMT-2000 Networks.
Q.1711 (03/99)
Network Functional Model for IMT-2000.

Broadband ISDN General Aspects

Q.2010 (02/95)
Broadband integrated services digital network overview - Signalling capability set 1, release 1.

Signalling ATM Adaptation Layer (SAAL)

Q.2100 (07/94)
B-ISDN signalling ATM adaptation layer (SAAL) overview description.
Q.2110 (07/94)
B-ISDN ATM Adaptation Layer - Service Specific Connection Oriented Protocol (SSCOP).
Q.2119 (07/96)
B-ISDN ATM adaptation layer - Convergence function for SSCOP above the frame relay core service.
Q.2120 (02/95)
B-ISDN meta-signalling protocol.
Q.2130 (07/94)
B-ISDN signalling ATM adaptation layer - Service specific coordination function for support of signalling at the user-network Interface (SSCF at UNI).
Q.2140 (02/95)
B-ISDN ATM adaptation layer - Service specific coordination function for signaling at the network node interface (SSCF at NNI).
Q.2144 (10/95)
B-ISDN signalling ATM adaptation layer (SAAL) - Layer management for the SAAL at the network node interface (NNI).
Q.2150.1 (12/99)
AAL Type 2 Signalling Transport Converter on Broadband MTP.
Q.2150.2 (12/99)
AAL Type 2 Signalling Transport Converter on SSCOP.

Signalling Network Protocols

Q.2210 (07/96)
Message transfer part level 3 functions and messages using the services of ITU-T Recommendation Q.2140.

Common Aspects of B-ISDN Application Protocols for Access Signalling and

Q.2610 (12/99)
Usage of cause and location in B-ISDN user part and DSS 2.
Q.2650 (02/95)
Interworking between Signalling System No. 7 broadband ISDN User Part (B-ISUP) and digital subscriber Signalling System No. 2 (DSS 2).
Q.2660 (12/99)
Interworking between Signalling System No. 7 Broadband ISDN User Part (B-ISUP) and Narrow-band ISDN User Part (N-ISUP).

B-ISDN Application Protocols of the Network

Q.2721.1 (07/96)
B-ISDN user part - Overview of the B-ISDN Network Node Interface Signalling Capability Set 2, Step 1.
Q.2722.1 (07/96)
B-ISDN User Part - Network Node Interface specification for point-to-multipoint call/connection control.
Q.2723.1 (07/96)
B-ISDN User Part - Support of additional traffic parameters for Sustainable Cell Rate and Quality of Service.
Q.2724.1 (07/96)
B-ISDN User Part - Look-ahead without state change for the Network Node Interface (NNI).
Q.2725.1 (07/96)
B-ISDN User part - Support of negotiation during connection setup.
Q.2725.2 (07/96)
B ISDN User Part - Modification procedures.
Q.2726.1 (07/96)
B-ISDN user part - ATM end system address.
Q.2726.2 (07/96)
B-ISDN user part - Call Priority.
Q.2726.3 (07/96)
B-ISDN user part - Network generated session identifier.
Q.2726.4 (06/00)
Q.2727 (07/96)
B-ISDN user part - Support of frame relay.
Q.2730 (12/99)
Signalling System No. 7 B-ISDN User Part (B-ISUP) - Supplementary services.
Q.2735.1 (06/97)
Stage 3 Description for Community of Interest Supplementary Services for B-ISDN Using SS No. 7: Closed User Group (CUG).
Q.2751.1 (09/97)
Extension of Q.751.1 for SAAL Signaling Links.
Q.2761 (02/95)
Functional description of the B-ISDN user part (B-ISUP) of signalling system No. 7.
Q.2762 (02/95)
General Functions of messages and signals of the B-ISDN user part (B-ISUP) of Signalling System No. 7.
Q.2763 (02/95)
Signalling System No. 7 B-ISDN User Part (B-ISUP) - Formats and codes.
Q.2764 (02/95)
Signalling System No. 7 B-ISDN User Part (B-ISUP) - Basic call procedures.
Q.2766.1 (05/98) + Ammend 1 (06/00)
Switched Virtual Path Capability.
Q.2767.1 (06/00)
Q.2769.1 (06/00)

B-ISDN Application Protocols for Access Signalling

Q.2931 (02/95) + Ammend 1 (06/97) + Ammend 2 (03/99) + Ammend 3 (03/99)
Digital Subscriber Signalling System No. 2 (DSS 2) - User-Network Interface (UNI) layer 3 specification for basic call/connection control.
Q.2932.1 (07/96)
Digital subscriber signalling system No. 2 - Generic functional protocol: Core functions.
Q.2933 (07/96)
Digital subscriber Signalling System No. 2 (DSS 2) - Signalling specification for Frame Relay service.
Q.2934 (05/98)
Digital Subscriber Signalling System No. 2 - Switched Virtual Path Capability.
Q.2939.1 (09/97)
Digital Subscriber Signalling System No. 2 - Application of DSS 2 Service-Related Information Elements by Equipment Supporting B-ISDN Services.
Q.2941.1 (09/97)
Digital Subscriber Signalling System No. 2 - Generic Identifier Transport.
Q.2941.3 (06/00)
Q.2951 (02/95)
Stage 3 description for number identification supplementary services using B-ISDN digital subscriber Signalling System No. 2 (DSS 2) - Basic Call.
Q.2951.1 (02/95)
Direct-Dialling-In (DDI).
Q.2951.2 (02/95)
Multiple Subscriber Number (MSN).
Q.2951.3 (02/95)
Calling Line Identification Presentation (CLIP).
Q.2951.4 (02/95)
Calling Line Identification Restriction (CLIR).
Q.2951.5 (02/95)
Connected Line Identification Presentation (COLP).
Q.2951.6 (02/95)
Connected Line Identification Restriction (COLR).
Q.2951.8 (02/95)
Sub-addressing (SUB).
Q.2953.4 Draft
Terminal portability (TP).
Q.2955.1 (06/97)
Stage 3 Description for Community of Interest Supplementary Services using B-ISDN Digital Subscriber Signalling System No. 2 (DSS 2): Closed User Group (CUG).
Q.2957 (02/95)
Stage 3 description for additional information transfer supplementary services using B-ISDN digital subscriber Signalling System No. 2 (DSS 2) - Basic call.
Q.2957.1 (02/95)
User-to-user signalling (UUS).
Q.2959 (07/96)
Digital subscriber signalling system No. 2 - Call priority.
Q.2961 (10/95)
Broadband integrated services digital network (B-ISDN) - Digital subscriber signalling system No. 2 (DSS 2) - Additional traffic parameters.
Q.2961.1 (10/95)
Additional Traffic Parameters.
Q.2961.2 (06/97) + Corr 1 (03/99)
Support of ATM Transfer Capability in the Broadband Bearer Capability Information Element.
Q.2961.3 (09/97)
Signalling Capabilities to Support Traffic Parameters for the Available Bit Rate (ABR) ATM Transfer Capability.
Q.2961.4 (09/97)
Signalling Capabilities to Support Traffic Parameters for the ATM Block Transfer (ABT) ATM Transfer Capability.
Q.2961.5 (03/99)
Additional Traffic Parameters for Cell Delav Variation Tolerance Indication.
Q.2961.6 (05/98)
Additional Signalling Procedures for the Support of the SBR2 and SBR3 ATM Transfer Capabilities.
Q.2962 (05/98)
Digital subscriber signalling system No. 2 - Connection characteristics negotiation during call/connection establishment phase.
Q.2963.1 (07/96)
Digital Subscriber Signalling System No. 2 - Connection modification: Peak cell rate modification by the connection owner.
Q.2963.2 (09/97)
Digital Subscriber Signalling System No. 2 - Connection Modification: Modification Procedures for Sustainable Cell Rate Parameters.
Q.2963.3 (05/98)
Digital Subscriber Signalling System No. 2 - Connection Modification: ATM Traffic Descriptor Modification with Negotiation by the Connection Owner.
Q.2964.1 (07/96)
Digital Subscriber Signalling System No. 2: Basic Look-Ahead.
Q.2965.1 (03/99) + Ammend 1 (06/00)
Digital Subscriber Signalling System No. 2 - Support of Quality of Service Classes.
Q.2971 (10/95) + Corr 1 (12/99)
Broadband integrated services digital network (B-ISDN) - Digital subscriber signalling system No. 2 (DSS 2) - User-network interface layer 3 specification for point-to-multipoint call/connection control.
Q.2982 (12/99)
B-ISDN Digital Subscriber Signalling No. 2 (DSS 2) Q.2931-Based Separated Call Control Protocol.
Q.2983 (12/99)
B-ISDN Digital Subscriber Signalling No. 2 (DSS 2): Bearer Control Protocol.
Supplement 3 to Series Q (05/98)
Number Portability - Scope and Capability Set 1 Architecture.
Supplement 4 to Series Q (05/98)
Number Portability - Capability Set 1 Requirements for Service Provider Portability (All Call Query and Onward Routing).
Supplement 5 to Series Q (03/99)
Number Portability - Capability Set 2 Requirements for Service Provider Portability (Query on Release and Dropback).
Supplement 6 to Series Q (03/99)
Technical Report TRQ.2000: Roadmap for the TRQ.2xxx-Series Technical Reports.
Supplement 7 to Series Q (03/99)
Technical Report TRQ.2001: General Aspects for the Development of Unified Signalling Requirements.
Supplement 8 to Series Q (03/99)
Technical Report TRQ.2400: Transport Control Signalling Requirements - Signalling Requirements for AAL Type 2 Link Control Capability Set 1.