SIST EN 300 356-18 V4.1.2:2004

• Abstract:

  To create ETSI endorsement documents to ITU ISUP 2000.

• Status: Published
• Publication Date: 31-Mar-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-Apr-2004
• Due Date: 01-Apr-2004
• Completion Date: 01-Apr-2004
• Ref Project: ETSI EN 300 356-18 V4.1.2 (2001-07) - Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 18: Completion of Calls to Busy Subscriber (CCBS) supplementary service [ITU-T Recommendation Q.733, clause 3 (1997) modified]

SIST EN 300 356-18 V4.1.2:2004 is the SIST adoption of ETSI EN 300 356-18 V4.1.2 for Integrated Services Digital Network (ISDN) signaling over Signalling System No.7 (SS7). It specifies the stage 3 protocol procedures and switching functions for the Completion of Calls to Busy Subscriber (CCBS) supplementary service, mainly for operators and implementers of international ISDN interconnection.

What does SIST EN 300 356-18 V4.1.2:2004 specify?

SIST EN 300 356-18 V4.1.2:2004 defines how CCBS is supported in the ISDN User Part (ISUP) version 4 at the international interface. The document is written as an ETSI endorsement of ITU-T Recommendation Q.733, clause 3 (1997), with ETSI modifications.

The scope focuses on stage 3 behavior, meaning the signaling procedures and switching functions that make the service work in the network. It covers the case where the service is offered via an intermediate ISDN and keeps the international interconnection view used by public telecommunications operators.

Annex	What it covers
Annex ZA	Informative coding of compatibility information for the CCSS parameter

The front matter also identifies the document as part 18 of a multi-part ISUP version 4 deliverable, with other parts covering basic services, supplementary services, and test-related deliverables.

What are the key requirements of SIST EN 300 356-18 V4.1.2:2004?

SIST EN 300 356-18 V4.1.2:2004 says CCBS is a stage 3 service description for pan-European ISDN over ISUP. In practice, that means implementers need to support the signaling behavior, not just the user-service description or the functional model.

Stage 3 behavior and service scope

The document states that CCBS lets user A, after reaching a busy destination B, complete the call later without dialing again when B becomes free. It applies to all circuit-switched basic services, so the service must fit into ordinary switched voice or data call handling.

Intermediate-ISDN and network handling

The standard gives additional requirements when the service reaches the user through an intermediate ISDN. It also keeps the functions, formats, codes and actions at originating and destination local exchanges for the international interface, including items marked for national use when they are supported in a network.

Handling of national and international signaling

When a national signaling system behaves differently, the international gateway exchange supports both the national network and the international network. For operators, this is the practical rule that keeps interworking consistent at borders and gateway nodes.

Interaction with call diversion

The modified text in subclause 3.6.10.2.2 sets the CCBS response when call forwarding or call diversion is already active. It distinguishes CFU, CFB and CFNR behavior, so switch logic has to accept or reject a CCBS request based on the forwarding condition at destination B.

Release and diagnostic information

The added text says that when call diversion is invoked at destination B and a release message arrives with cause value #17 or #34, the diagnostic field is updated to show whether CCBS is possible. This matters because the network must signal the service state clearly instead of leaving the requester to infer it.

Compatibility information

Annex ZA gives the coding of compatibility information for the CCSS parameter. For implementers, this is the part to check when they need to encode the parameter and the associated instruction indicators consistently.

What terms does SIST EN 300 356-18 V4.1.2:2004 define?

• Completion of Calls to Busy Subscriber (CCBS) - A supplementary service that lets a caller ask for a busy destination to be called again automatically when it becomes free.
• Integrated Services Digital Network (ISDN) - The digital network environment in which this CCBS specification is applied.
• Signalling System No.7 (SS7) - The signaling system used to carry the network control information for the service.
• ISDN User Part (ISUP) - The SS7 user part that carries the call-control signaling used by this document.
• European Telecommunications Standards Institute (ETSI) - The organization that produced the European Standard and its endorsement text.

Who uses SIST EN 300 356-18 V4.1.2:2004?

SIST EN 300 356-18 V4.1.2:2004 is used by public telecommunications operators, network engineers, switch vendors and test specialists working on ISDN interconnection. It is also relevant to teams that configure international gateway exchanges, because the document addresses how CCBS behaves across national and international signaling boundaries.

What changed in SIST EN 300 356-18 V4.1.2:2004 from the previous edition?

The document history shows the progression from earlier publications of the same part, including V3.1.3 and V4.1.1, to V4.1.2. The stated update history records the public enquiry, vote and publication dates for V4.1.2.

Which standards are used with SIST EN 300 356-18 V4.1.2:2004?

The document cites these references and companion parts:

• ITU-T Recommendation I.130 - the three-level method for describing telecommunication services.
• ETSI ETS 300 121 - earlier ISUP version 1 use for international ISDN interconnections.
• ETSI EN 300 356-1 - basic services for ISUP version 4.
• ETSI EN 300 356-2 - ISDN supplementary service framework for ISUP version 4.
• ETSI ETS 300 357 - stage 1 service description for CCBS.
• ETSI ETS 300 358 - stage 2 functional capabilities and information flows for CCBS.
• ETSI EN 300 403-1 - DSS1 protocol reference used for Q.931-based signaling comparison.

What does the SIST EN 300 356-18 V4.1.2:2004 document contain?

The body replaces the Scope and References clauses of ITU-T Recommendation Q.733, clause 3, with ETSI-specific text. It also includes a table of modified references and targeted text changes in subclause 3.6.10.2.2 and at the end of the clause.

Annex ZA provides informative coding guidance for compatibility information, including the CCSS parameter and its instruction indicators. The document also carries the standard ETSI front matter, endorsement notice, national transposition dates, and publication history.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.%6Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 18: Completion of Calls to Busy Subscriber (CCBS) supplementary service [ITU-T Recommendation Q.733, clause 3 (1997) modified]33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:EN 300 356-18 Version 4.1.2SIST EN 300 356-18 V4.1.2:2004en01-april-2004SIST EN 300 356-18 V4.1.2:2004SLOVENSKI
STANDARD
ETSIEN300356-18V4.1.2(2001-07)EuropeanStandard(Telecommunicationsseries)IntegratedServicesDigitalNetwork(ISDN);SignallingSystemNo.7(SS7);ISDNUserPart(ISUP)version4fortheinternationalinterface;Part18:CompletionofCallstoBusySubscriber(CCBS)supplementaryservice[ITU-TRecommendationQ.733,clause3(1997)modified]SIST EN 300 356-18 V4.1.2:2004

ETSIETSIEN300356-18V4.1.2(2001-07)2ReferenceREN/SPAN-01082-18KeywordsISDN,ISUP,SS7,supplementaryservice,CCBS,endorsementETSI650RoutedesLuciolesF-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 300 356-18 V4.1.2:2004

ETSIETSIEN300356-18V4.1.2(2001-07)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).Thepresentdocumentispart18ofamulti-partdeliverablecoveringtheISDNUserPart(ISUP)version4fortheinternationalinterface,asidentifiedbelow:Part1:"Basicservices[ITU-TRecommendationsQ.761toQ.764(1999)modified]";Part2:"ISDNsupplementaryservice[ITU-TRecommendationQ.730(1999)modified]";Part3:"CallingLineIdentificationPresentation(CLIP)supplementaryservice[ITU-TRecommendationQ.731,clause3(1993)modified]";Part4:"CallingLineIdentificationRestriction(CLIR)supplementaryservice[ITU-TRecommendationQ.731,clause4(1993)modified]";Part5:"ConnectedLineIdentificationPresentation(COLP)supplementaryservice[ITU-TRecommendationQ.731,clause5(1993)modified]";Part6:"ConnectedLineIdentificationRestriction(COLR)supplementaryservice[ITU-TRecommendationQ.731,clause6(1993)modified]";Part7:"TerminalPortability(TP)supplementaryservice[ITU-TRecommendationQ.733,clause4(1993)modified]";Part8:"User-to-UserSignalling(UUS)supplementaryservice[ITU-TRecommendationQ.737,clause1(1997)modified]";Part9:"ClosedUserGroup(CUG)supplementaryservice[ITU-TRecommendationQ.735,clause1(1993)modified]";Part10:"Subaddressing(SUB)supplementaryservice[ITU-TRecommendationQ.731,clause8(1992)modified]";Part11:"MaliciousCallIdentification(MCID)supplementaryservice[ITU-TRecommendationQ.731,clause7(1997)modified]";Part12:"ConferenceCall,add-on(CONF)supplementaryservice[ITU-TRecommendationQ.734,clause1(1993)andimplementorsguide(1998)modified]";Part14:"ExplicitCallTransfer(ECT)supplementaryservice[ITU-TRecommendationQ.732,clause7(1996)andimplementorsguide(1998)modified]";Part15:"Diversionsupplementaryservice[ITU-TRecommendationQ.732,clauses2to5(1999)modified]";Part16:"CallHold(HOLD)supplementaryservice[ITU-TRecommendationQ.733,clause2(1993)modified]";Part17:"CallWaiting(CW)supplementaryservice[ITU-TRecommendationQ.733,clause1(1992)modified]";SIST EN 300 356-18 V4.1.2:2004

ETSIETSIEN300356-18V4.1.2(2001-07)4Part18:"CompletionofCallstoBusySubscriber(CCBS)supplementaryservice[ITU-TRecommendationQ.733,clause3(1997)modified]";Part19:"Three-Party(3PTY)supplementaryservice[ITU-TRecommendationQ.734,clause2(1996)andimplementorsguide(1998)modified]";Part20:"CompletionofCallsonNoReply(CCNR)supplementaryservice[ITU-TRecommendationQ.733,clause5(1999)modified]";Part21:"AnonymousCallRejection(ACR)supplementaryservice[ITU-TRecommendationQ.731,clause4(1993)]";Part31:"ProtocolImplementationConformanceStatement(PICS)proformaspecificationforbasicservices";Part32:"TestSuiteStructureandTestPurposes(TSS&TP)specificationforbasicservices";Part33:"AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationforbasicservices";Part34:"ProtocolImplementationConformanceStatement(PICS)proformaspecificationforsupplementaryservices";Part35:"TestSuiteStructureandTestPurposes(TSS&TP)specificationforsupplementaryservices";Part36:"AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationforsupplementaryservices".InaccordancewithITU-TRecommendationI.130[1],thefollowingthreelevelstructureisusedtodescribethesupplementarytelecommunicationservicesasprovidedbyEuropeanpublictelecommunicationsoperatorsunderthepan-EuropeanIntegratedServicesDigitalNetwork(ISDN):-Stage1:isanoverallservicedescription,fromtheuser'sstand-point;-Stage2:identifiesthefunctionalcapabilitiesandinformationflowsneededtosupporttheservicedescribedinstage1;and-Stage3:definesthesignallingsystemprotocolsandswitchingfunctionsneededtoimplementtheservicedescribedinstage1.Thepresentdocumentdetailsthestagethreeaspects(signallingsystemprotocolsandswitchingfunctions)neededtosupporttheCompletionofCallstoBusySubscriber(CCBS)supplementaryservice.Thestage1andstage2aspectsaredetailedinETS300357[5]andETS300358[6],respectively.NationaltranspositiondatesDateofadoptionofthisEN:13July2001Dateofl
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