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ITU-T Q.765.4 (06/2000)

Signalling system No. 7 – Application transport mechanism: Support of the generic addressing and transport protocol

This Recommendation describes the extensions required for the support of the Generic Addressing and Transport protocol (GAT) mechanism over the public Network Nodal Interface (NNI). This application makes use of the Application Transport Mechanism (APM) described in ITU-T Q.765 (2000) for bearer related signalling, and the Transaction Capability (TC) for signalling involving no bearer. This Recommendation specifies the respective users (i.e. APM-user, TC-user) to support signalling applications using the Generic Addressing and Transport protocol as defined in ITU-T Q.860.

Citation:	https://handle.itu.int/11.1002/1000/5120
Series title:	Q series: Switching and signalling, and associated measurements and tests Q.700-Q.799: Specifications of Signalling System No. 7 Q.760-Q.769: ISDN user part
Approval date:	2000-06-15
Approval process:	TAP
Status:	In force
Maintenance responsibility:	ITU-T Study Group 11
Further details:	Patent statement(s)

Ed.	ITU-T Recommendation	Status	Summary	Table of Contents	Download
1	Q.765.4 (06/2000)	In force	here	here	here


ITU-T Supplement	Title	Status	Summary	Table of contents	Download
Q Suppl. 1 (10/1995)	Signalling System No.7 testing and planning tools	In force	-	here	here
Q Suppl. 2 (09/1997)	Intelligent network user's guide: Supplement for IN CS-1	In force	here	here	here
Q Suppl. 3 (05/1998)	Number portability – Scope and capability set 1 architecture	In force	here	here	here
Q Suppl. 4 (05/1998)	Number portability – Capability set 1 requirements for service provider portability (All call query and Onward routing)	In force	here	here	here
Q Suppl. 5 (03/1999)	Number portability – Capability set 2 requirements for service provider portabilty (Query on release and Dropback)	In force	here	here	here
Q Suppl. 7 (03/1999)	Technical Report TRQ.2001: General aspects for the development of unified signalling requirements	In force	here	here	here
Q Suppl. 8 (03/1999)	Technical Report TRQ.2400: Transport control signalling requirements – Signalling requirements for AAL Type 2 link control capability set 1	In force	here	here	here
Q Suppl. 9 (03/2004)	Technical Report TRQ.2000: Roadmap for the TRQ.2xxx-series Technical Reports	In force	here	here	here
Q Suppl. 10 (12/1999)	Technical Report TRQ.2002: Information flow elements	In force	here	here	here
Q Suppl. 11 (12/1999)	Technical Report TRQ.2010: B-ISDN signalling interworking requirements	In force	here	here	here
Q Suppl. 12 (12/1999)	Technical Report TRQ.2100: Coordinated call control and bearer control signalling requirements – Root-party coordinated call and bearer control	In force	here	here	here
Q Suppl. 13 (12/1999)	Technical Report TRQ.2110: Coordinated call control and bearer control signalling requirements – Leaf-party coordinated call and bearer control	In force	here	here	here
Q Suppl. 14 (12/1999)	Technical Report TRQ.2120: Coordinated call control and bearer control signalling requirements – Third-party coordinated call and bearer control	In force	here	here	here
Q Suppl. 15 (12/1999)	Technical Report TRQ.2130: Coordinated call control and bearer control signalling requirements for leaf initiated join service	In force	here	here	here
Q Suppl. 16 (12/1999)	Technical Report TRQ.2140: Signalling requirements for the support of narrowband services via broadband transport technologies	In force	here	here	here
Q Suppl. 17 (12/1999)	Technical Report TRQ.2200: Call control signalling requirements – Party call control	In force	here	here	here
Q Suppl. 18 (12/1999)	Technical Report TRQ.2230: Call control signalling requirements – Join call service	In force	here	here	here
Q Suppl. 19 (12/1999)	Technical Report TRQ.2300: Bearer control signalling requirements – Root-party bearer control	In force	here	here	here
Q Suppl. 20 (12/1999)	Technical Report TRQ.2310: Bearer control signalling requirements – Leaf-party bearer control	In force	here	here	here
Q Suppl. 21 (12/1999)	Technical Report TRQ.2320: Bearer control signalling requirements – Third-party bearer control	In force	here	here	here
Q Suppl. 22 (12/1999)	Technical Report TRQ.3000: Operation of the bearer independant call control (BICC) protocol with digital subscriber signalling system No. 2 (DSS2)	In force	here	here	here
Q Suppl. 24 (12/1999)	Technical Report TRQ.3020: Operation of the bearer independant call control (BICC) protocol with broadband integrated services digital network user part (B-ISUP) for AAL Type 1 adaptation	In force	here	here	here
Q Suppl. 26 (12/1999)	Broadband integrated services digital network (B-ISDN) – Digital subscriber signalling system No. 2 (DSS2) and signalling system No. 7 (B-ISUP) – Support of services over IP-based networks	In force	here	here	here
Q Suppl. 27 (12/1999)	Technical Report – Overview of Signalling and Protocol Framework for an Emerging Environment (SPFEE)	In force	here	here	here
Q Suppl. 28 (12/1999)	Technical Report: Signalling and protocol framework for an emerging environment (SPFEE) – Specifications for service access	In force	here	here	here
Q Suppl. 29 (12/1999)	Service Modelling: Evolution to the use of object oriented techniques	In force	here	here	here
Q Suppl. 31 (12/2000)	Technical Report TRQ.2141.0: Signalling requirements for the support of narrow-band services over broadband transport technologies – Capability set 2 (CS-2)	In force	here	here	here
Q Suppl. 32 (11/2002)	Technical Report TRQ.2141.1: Signalling requirements for the support of narrowband services via broadband transport technologies – CS-2 signalling flows	In force	here	here	here
Q Suppl. 33 (12/2000)	Technical Report TRQ.2401: Transport control signalling requirements – Signalling requirements for AAL type 2 link control capability set 2	In force	here	here	here
Q Suppl. 34 (12/2000)	Technical Report TRQ.2410: Signalling Requirements Capability Set 1 for the support of IP Bearer Control in BICC networks	In force	here	here	here
Q Suppl. 35 (12/2000)	Technical Report TRQ.2500: Signalling Requirements for the support of the call bearer control interface (CS-1)	In force	here	here	here
Q Suppl. 36 (12/2000)	Technical Report TRQ.3030: Operation of the bearer independent call control (BICC) protocol (CS-2) with IP bearer control protocol (IPBCP)	In force	here	here	here
Q Suppl. 37 (07/2006)	DSS1 and DSS2 messages and information element identifiers	In force	here	here	here
Q Suppl. 38 (05/2001)	Technical Report TRQ.2600: BICC signalling transport requirements – Capability set 1	In force	here	here	here
Q Suppl. 39 (03/2002)	Technical Report TRQ.2700: Requirements for signalling in access networks that support BICC	In force	here	here	here
Q Suppl. 40 (11/2002)	Technical Report: Reference document on API/object interface between network control and application layer	In force	here	here	here
Q Suppl. 41 (11/2002)	Technical Report TRQ.2003: Roadmap to the BICC protocol Recommendations, BICC interworking Recommendations, and BICC requirement Supplements	In force	here	here	here
Q Suppl. 42 (09/2003)	Technical Report TRQ.2402: Transport control signalling requirements – Signalling requirements for AAL type 2 link control Capability Set 3	In force	here	here	here
Q Suppl. 43 (09/2003)	Technical Report TRQ.2415: Transport control signalling requirements – Signalling requirements for IP connection control in radio access networks Capability Set 1	In force	here	here	here
Q Suppl. 44 (09/2003)	Technical Report TRQ.2800: Transport control signalling requirements – Signalling requirements for AAL type 2 to IP interworking Capability Set 1	In force	here	here	here
Q Suppl. 45 (09/2003)	Technical Report TRQ.2815: Requirements for interworking BICC/ISUP network with originating/destination networks based on Session Initiation Protocol and Session Description Protocol	In force	here	here	here
Q Suppl. 46 (09/2003)	Technical Report TRQ.2830: ATM-MPLS network interworking signalling requirements	In force	here	here	here
Q Suppl. 47 (11/2003)	Emergency services for IMT-2000 networks – Requirements for harmonization and convergence	In force	here	here	here
Q Suppl. 48 (03/2004)	Guideline document for specifying API/object interface between network control and application layer	In force	here	here	here
Q Suppl. 49 (02/2014)	Signalling requirements to support IP telephony	In force	here	here	here
Q Suppl. 50 (03/2004)	Technical Report TRQ.2145: Requirements for a Narrow-band Signalling Syntax (NSS)	In force	here	here	here
Q Suppl. 51 (12/2004)	Signalling requirements for IP-QoS	In force	here	here	here
Q Suppl. 52 (12/2004)	NNI mobility management requirements for systems beyond IMT-2000	In force	here	here	here
Q Suppl. 53 (09/2005)	Signalling requirements to support the International Emergency Preference Scheme (IEPS)	In force	here	here	here
Q Suppl. 54 (04/2007)	Signalling requirements at the interface between SUP-FE and I/S-CSC-FE	In force	here	here	here
Q Suppl. 55 (04/2007)	Signalling requirements at the interface between AS-FE and S-CSC-FE	In force	here	here	here
Q Suppl. 56 (04/2007)	Organization of NGN service user data	In force	here	here	here
Q Suppl. 57 (01/2008)	Signalling requirements to support the emergency telecommunications service (ETS) in IP networks	In force	here	here	here
Q Suppl. 58 (01/2008)	Organization of NGN transport user data	In force	here	here	here
Q Suppl. 59 (01/2008)	Signalling flows and parameter mapping for resource control	In force	here	here	here
Q Suppl. 61 (04/2010)	Evaluation of signalling protocols to support ITU-T Y.2171 admission control priority levels	In force	here	here	here
Q Suppl. 62 (02/2014)	Overview of the work of standards development organizations and other organizations on the emergency telecommunications service	In force	here	here	here
Q Suppl. 63 (06/2013)	Signalling protocol mappings in support of the Emergency Telecommunications Service in IP networks	In force	here	here	here
Q Suppl. 64 (02/2014)	Physical realization of next generation networks	In force	here	here	here
Q Suppl. 67 (04/2015)	Framework of signalling for software-defined networking	In force	here	here	here
Q Suppl. 68 (12/2015)	Technical Report on emergency telecommunication service (ETS) interoperability limitations	In force	here	here	here
Q Suppl. 69 (11/2025)	Framework for interconnection between VoLTE-based networks and other networks supporting emergency call	In force	here	here	here
Q Suppl. 70 (06/2019)	Signalling requirements for IMS and GSM/UMTS network supporting multi-device emergency telecommunications service	In force	here	here	here
Q Suppl. 72 (11/2025)	Signalling requirements for IP multimedia subsystem (IMS) emergency call in support of multiple access	In force	here	here	here
Q Suppl. 73 (03/2021)	Guidelines for permissive versus restrictive system implementations to address counterfeit, stolen and illegal mobile devices	In force	here	here	here
Q Suppl. 74 (03/2021)	Roadmap for the ITU-T Q.5050-series - Combat of counterfeit ICT and stolen mobile devices	In force	here	here	here
Q Suppl. 75 (12/2021)	Use cases on the combat of counterfeit ICT and stolen mobile devices	In force	here	here	here
Q Suppl. 78 (02/2025)	Signalling requirements of service function chaining (SFC) with non-uniformly encoded service index in service forwarding path (SFP) changing scenarios	In force	here	here	here
Q Suppl. 79 (11/2025)	Implementation of software-defined wide area networking (SD-WAN) service based on segment routing IPv6 (SRv6)	In force	here	here	here
Q Suppl. 81 (03/2026)	Signalling requirements for inter-domain software-defined wide area networking service	In force	-	-	here
Q Suppl. 82 (03/2026)	Adaptive Network Coding Relay Protocol	In force	-	-	here

Q.765.4 (2000-06)

Index of all ASN.1 assignments defined in this Recommendation.

Non official changes applied to these modules so that they compile

Click here to download all the modules of this Recommendation (zipped archive)

Click here to download all the modules needed to compile this Recommendation (zipped archive)

Language	Title	OID	Obs.	Last update
ASN.1	COGAT-Protocol	0.0.17.765.4.2.1.1

Title	Approved on	Download
SS7 vulnerabilities and mitigation measures for digital financial services transactions	2019	here
ISDN field trial guidelines	1991	here
Guidelines for Implementing a Signalling System No. 7 Network	1991	here

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ITU-T Q.765.4 (06/2000)