SIST EN 301 850-1 V1.1.1:2005

• Abstract:

  To describe the extensions required for the support of the generic addressing and transport protocol (GAT) mechnism over the public network nodal interface (NNI); The application makes use of the Enhanced Application Transport Mechansim described in Recommendation 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 Rec Q.gft. (endorsement deliverable ITU-T recommendation Q.765.GAT)

• Status: Published
• Publication Date: 31-Dec-2004
• ICS: 33.080 - Integrated Services Digital Network (ISDN)
• Technical Committee: SPN - Services and Protocols for Networks
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jan-2005
• Due Date: 01-Jan-2005
• Completion Date: 01-Jan-2005
• Ref Project: ETSI EN 301 850-1 V1.1.1 (2001-02) - Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP); Application transport mechanism; Support of the generic addressing and transport protocol; Part 1: Protocol specification [ITU-T Recommendation Q.765.4, modified)

SIST EN 301 850-1 V1.1.1:2005 is the Slovenian adoption of an ETSI European Standard for Integrated Services Digital Network (ISDN) signalling over Signalling System No. 7 (SS7). It specifies the protocol extensions for the Generic Addressing and Transport protocol (GAT) on the public Network Nodal Interface (NNI), using the Application Transport Mechanism (APM) for bearer-related signalling and Transaction Capability (TC) for signalling that does not involve a bearer.

What does SIST EN 301 850-1 V1.1.1:2005 specify?

SIST EN 301 850-1 V1.1.1:2005 specifies how GAT is supported over the public NNI in ISUP-based signalling. It is part 1 of a multi-part deliverable and presents the protocol specification.

The endorsed text is built around two main clauses:

• Clause 1, Scope - states the purpose of the document and the signalling context it applies to.
• Clause 2, References - lists the documents that form the technical basis for the protocol text.

The standard is an endorsement of ITU-T Recommendation Q.765.4 with global modifications applied, so the ETSI document is the operating reference for implementation in this form.

What are the key requirements of SIST EN 301 850-1 V1.1.1:2005?

SIST EN 301 850-1 V1.1.1:2005 defines the protocol extensions needed to carry GAT signalling over the public NNI. In practice, this tells implementers where the GAT mechanism fits in the ISDN/SS7 signalling path.

• Use APM for bearer-related signalling - the document says the Application Transport Mechanism (APM) is used when the signalling relates to a bearer. This matters when designing messages that accompany a call or other bearer service.
• Use TC when no bearer is involved - the Transaction Capability (TC) is used for signalling without a bearer. This matters for application exchanges that are not tied to call transport.
• Identify the relevant users - the document names the respective users as APM-user and TC-user. This matters because an implementation must know which signalling application uses which transport mechanism.
• Support signalling applications using GAT - the protocol is intended for signalling applications that use the Generic Addressing and Transport protocol as defined in the companion GAT specification. This matters for interoperability between network elements.
• Apply the ETSI-endorsed reference set - the body of the ITU-T text is adapted by replacing several references with ETSI or ETSI/ITU-T documents. This matters because implementers need the correct companion specifications for ISUP, SCCP, TCAP, ASN.1 and cause/location usage.
• Follow the endorsed scope and references clauses - the modification specifically replaces the original scope and reference clauses. This matters because those clauses define how the rest of the protocol text is to be read.

What terms does SIST EN 301 850-1 V1.1.1:2005 define?

SIST EN 301 850-1 V1.1.1:2005 uses a small set of core signalling terms that describe the transport arrangement.

• Generic Addressing and Transport protocol (GAT) - the signalling protocol mechanism supported by this document.
• Network Nodal Interface (NNI) - the public network interface over which the GAT mechanism is supported.
• Application Transport Mechanism (APM) - the bearer-related transport mechanism used by this standard.
• Transaction Capability (TC) - the mechanism used when signalling does not involve a bearer.
• APM-user - the signalling application that uses APM.
• TC-user - the signalling application that uses TC.
• ISDN User Part (ISUP) - the SS7 signalling part addressed by the document.

Who uses SIST EN 301 850-1 V1.1.1:2005?

SIST EN 301 850-1 V1.1.1:2005 is used by telecom engineers, network equipment suppliers, and operators working with ISDN and SS7 signalling. It is relevant when implementing or assessing signalling applications that use GAT over the NNI and need to choose between APM and TC depending on whether a bearer is involved.

What changed in SIST EN 301 850-1 V1.1.1:2005 from the previous edition?

SIST EN 301 850-1 V1.1.1:2005 is an endorsement of ITU-T Recommendation Q.765.4, with modifications applied for ETSI use. The stated changes replace the Scope and References clauses and update the in-text references to ETSI and related companion standards.

Which standards are used with SIST EN 301 850-1 V1.1.1:2005?

The standard relies on the following companion documents:

• ETSI EN 301 069-1 - the Application Transport Mechanism reference used for bearer-related signalling.
• ETSI EN 301 813-1 - the GAT protocol reference used for the signalling applications supported here.
• ETSI EN 300 356-1 - the ISUP basic services reference used for the international interface.
• ITU-T Recommendation Q.1400 - provides the architecture framework for signalling and OA&M protocols using OSI concepts.
• ETSI EN 300 009 - provides SCCP support for international interconnection.
• ETS 300 134 - provides TCAP.
• ITU-T Recommendation X.680 / ISO/IEC 8824-1 - provides ASN.1 basic notation.
• ETSI EN 300 485 - provides cause and location usage in DSS1 and ISUP.

What does the SIST EN 301 850-1 V1.1.1:2005 document contain?

SIST EN 301 850-1 V1.1.1:2005 contains the front matter, the endorsement notice, the scope and reference clauses, and the mapped references used throughout the text. It also records publication and history information, along with the standard copyright and IPR notices.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.SRUDFLILNDFLMDIntegrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP); Application transport mechanism; Support of the generic addressing and transport protocol; Part 1: Protocol specification [ITU-T Recommendation Q.765.4, modified)33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:EN 301 850-1 Version 1.1.1SIST EN 301 850-1 V1.1.1:2005en01-januar-2005SIST EN 301 850-1 V1.1.1:2005SLOVENSKI
STANDARD
ETSIEN301850-1V1.1.1(2001-02)EuropeanStandard(Telecommunicationsseries)IntegratedServicesDigitalNetwork(ISDN);SignallingSystemNo.7(SS7);ISDNUserPart(ISUP);Applicationtransportmechanism;Supportofthegenericaddressingandtransportprotocol;Part1:Protocolspecification[ITU-TRecommendationQ.765.4,modified]SIST EN 301 850-1 V1.1.1:2005

ETSIETSIEN301850-1V1.1.1(2001-02)2ReferenceDEN/SPAN-01094Keywordsendorsement,ISDN,ISUP,NNI,SS7,protocolETSI650RoutedesLuciolesF-06921SophiaAntipolisCedex-FRANCETel.:[phone]Fax:[phone]SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/88ImportantnoticeIndividualcopiesofthepresentdocumentcanbedownloadedfrom:http://www.etsi.orgThepresentdocumentmaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.Usersofthepresentdocumentshouldbeawarethatthedocumentmaybesubjecttorevisionorchangeofstatus.InformationonthecurrentstatusofthisandotherETSIdocumentsisavailableathttp://www.etsi.org/tb/status/Ifyoufinderrorsinthepresentdocument,sendyourcommentto:[e-mail]opartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2001.Allrightsreserved.SIST EN 301 850-1 V1.1.1:2005

ETSIETSIEN301850-1V1.1.1(2001-02)3IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.TheinformationpertainingtotheseessentialIPRs,ifany,ispubliclyavailableforETSImembersandnon-members,andcanbefoundinETSISR000314:"IntellectualPropertyRights(IPRs);Essential,orpotentiallyEssential,IPRsnotifiedtoETSIinrespectofETSIstandards",whichisavailablefromtheETSISecretariat.LatestupdatesareavailableontheETSIWebserver(http://www.etsi.org/ipr).PursuanttotheETSIIPRPolicy,noinvestigation,includingIPRsearches,hasbeencarriedoutbyETSI.NoguaranteecanbegivenastotheexistenceofotherIPRsnotreferencedinETSISR000314(ortheupdatesontheETSIWebserver)whichare,ormaybe,ormaybecome,essentialtothepresentdocument.ForewordThisEuropeanStandard(Telecommunicationsseries)hasbeenproducedbyETSITechnicalCommitteeServicesandProtocolsforAdvancedNetworks(SPAN).Thepresentdocumentispart1ofamulti-partdeliverablecoveringtheIntegratedServicesDigitalNetwork(ISDN);SignallingSystemNo.7;ISDNUserPart(ISUP);Applicationtransportmechanism;Supportofthegenericaddressingandtransportprotocol,asidentifiedbelow:Part1:"Protocolspecification[ITU-TRecommendationQ.765.4,modified]".Furtherpartsmaybeproducedinthefuture.NationaltranspositiondatesDateofadoptionofthisEN:9February2001DateoflatestannouncementofthisEN(doa):31
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