SIST EN 300 356-15 V4.2.1:2004

• 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 300 356-15 V4.2.1 (2001-07) - Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 15: Diversion supplementary service [ITU-T Recommendation Q.732, clauses 2 to 5 (1999) modified]

SIST EN 300 356-15 V4.2.1:2004 is the Slovenian adoption of an ETSI European Standard for the ISDN Diversion supplementary service on Signalling System No.7 (SS7) ISDN User Part (ISUP) version 4. It specifies stage 3 signalling procedures and switching functions for the international interface, mainly for public telecommunications operators, network engineers, and vendors of ISDN exchanges and gateways.

What does SIST EN 300 356-15 V4.2.1:2004 specify?

SIST EN 300 356-15 V4.2.1:2004 specifies the stage 3 aspects of the Diversion supplementary service for pan-European ISDN, using SS7 ISUP for international interconnection. In practice, it tells implementers how the network should signal, forward, and interpret diversion-related information between exchanges.

The document is an ETSI endorsement of ITU-T Recommendation Q.732, clauses 2 to 5 (1999), with ETSI modifications. It is organized around the adapted ITU-T text, with added Scope and References clauses and one informative annex.

Annex	What it covers
ZA	Compatibility information coding for call diversion information, generic notification, and redirection number restriction parameters

What are the key requirements of SIST EN 300 356-15 V4.2.1:2004?

Stage 3 scope and implementation context

The standard focuses on protocol procedures and switching functions for the Diversion supplementary service at stage 3. That matters because stage 3 is the implementation level - it is the part that switch and gateway designers use when building signalling behavior.

The document applies to all circuit-switched telecommunication services in the international interface. It also keeps some national-use formats, codes, and procedures for informative purposes, so operators can align international and national behavior when the same feature is supported in both networks.

Number handling and backward signalling

Clause 2.5.2.1.1 requires the Address Complete Message (ACM) to carry an optional backward call indicator showing that call diversion may occur when the call is not yet in a stable state. This tells the receiving exchange to treat the call as potentially divertible, not as fully settled.

Clauses 2.5.2.3.1 and 2.5.2.4.1 require outgoing and incoming international gateway exchanges to check the original called number and the redirecting number in the Initial Address Message (IAM). The procedures follow the same approach used for the calling party number in the CLIP and CLIR supplementary services, so implementers can reuse consistent number-handling logic.

CPG, ACM, and event information

Clause 2.5.2.4.1 defines how a network that supports Call Progress (CPG) as the first backward message maps between CPG and ACM. If the national network uses CPG with event information for CFB, CFNR, or CFU, the gateway can generate missing call-diversion information from that event data.

In practice, this is an interworking rule: the gateway must preserve the meaning of progress and diversion information even when one side uses CPG and the other side uses ACM. Bilateral agreement is needed before certain call-forwarding codes are passed in event information.

Parameter handling in a diverting exchange

Clause 2.5.2.5.1.2 and the related tables set out how a diverting exchange handles the global call reference and cause-related parameters. The global call reference can be passed unchanged or newly generated for the diverted call, which affects how the diverted leg is correlated in traces and call records.

The same clause also covers the Connected number, Generic number, and additional connected number. Clause 2.6.3 adds that these numbers are diverted by the exchange, so implementers must keep the diverted party identity aligned with the diverted call leg.

CCBS-related release handling

Clause 2.6.19 says that when a REL message received at a diverting exchange contains cause indicator values #17 or #34, the CCBS indicator in the diagnostic field is not transferred transparently. A new CCBS indicator is inserted into the REL message sent onward, which matters for correct handling of Completion of Calls to Busy Subscriber (CCBS) information during diversion.

Compatibility coding

Annex ZA gives the recommended coding for parameter compatibility information for call diversion information, generic notification, and redirection number restriction parameters. This is useful when different networks exchange these parameters and need a consistent way to interpret whether to pass, discard, or modify them.

What terms does SIST EN 300 356-15 V4.2.1:2004 define?

• ISDN (Integrated Services Digital Network) - The digital network environment for which the diversion supplementary service is specified.
• SS7 (Signalling System No.7) - The signalling system used to carry the ISUP procedures between exchanges.
• ISUP (ISDN User Part) - The SS7 protocol part that carries ISDN call-control signalling.
• IAM (Initial Address Message) - The message that carries key called-number and redirecting-number information at call setup.
• ACM (Address Complete Message) - The backward message used here to carry call-diversion-related indication.
• CPG (Call Progress) - A backward message that can be mapped to or from ACM in diversion interworking.
• REL (Release) - The message used when a call is cleared, including cause and diagnostic information such as CCBS indicators.

Who uses SIST EN 300 356-15 V4.2.1:2004?

SIST EN 300 356-15 V4.2.1:2004 is used by public telecommunications operators, switch and gateway manufacturers, and signalling engineers working on ISDN interconnection. It is also relevant to test laboratories and interoperability teams that need to verify diversion behavior across SS7/ISUP networks.

Quality managers and buyers use it when they need to confirm that an exchange or gateway supports diversion signalling in the international ISDN interface. It is especially relevant where number presentation, redirection, and call-progress handling must match between networks.

Which standards are used with SIST EN 300 356-15 V4.2.1:2004?

Reference	What it contributes
ITU-T Recommendation I.130	The three-stage model for describing telecommunication services
ETSI ETS 300 121	ISUP version 1 for international ISDN interconnections
ETSI EN 300 356-1	Basic services and the modified Q.761 to Q.764 material
ETSI EN 300 356-2	The ISDN supplementary service framework and modified Q.730 material
ETSI EN 300 356-3	CLIP supplementary service behavior
ETSI EN 300 356-4	CLIR supplementary service behavior
ETSI EN 300 356-18	CCBS supplementary service behavior
ETSI EN 300 403-1	DSS1 signalling network layer and Q.931 basis

What does the SIST EN 300 356-15 V4.2.1:2004 document contain?

The document contains the adapted text of ITU-T Recommendation Q.732 clauses 2 to 5, with ETSI-specific changes marked in the body. It also contains reference handling rules that link this part to the other ISUP and supplementary-service parts of the EN 300 356 series.

Annex ZA adds recommended compatibility coding for diversion-related parameters, so implementers can align parameter handling across interoperating networks. The body of the document also includes message and parameter handling cases, such as IAM number checks, CPG to ACM mapping, and release-message treatment for CCBS indicators.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.VSUHPHQMHQR@Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 15: Diversion supplementary service [ITU-T Recommendation Q.732, clauses 2 to 5 (1999) modified]33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:EN 300 356-15 Version 4.2.1SIST EN 300 356-15 V4.2.1:2004en01-april-2004SIST EN 300 356-15 V4.2.1:2004SLOVENSKI
STANDARD
ETSIEN300356-15V4.2.1(2001-07)EuropeanStandard(Telecommunicationsseries)IntegratedServicesDigitalNetwork(ISDN);SignallingSystemNo.7(SS7);ISDNUserPart(ISUP)version4fortheinternationalinterface;Part15:Diversionsupplementaryservice[ITU-TRecommendationQ.732,clauses2to5(1999)modified]SIST EN 300 356-15 V4.2.1:2004

ETSIETSIEN300356-15V4.2.1(2001-07)2ReferenceREN/SPAN-01082-15KeywordsISDN,ISUP,SS7,supplementaryservice,CF,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 300 356-15 V4.2.1:2004

ETSIETSIEN300356-15V4.2.1(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).Thepresentdocumentispart15ofamulti-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]";SIST EN 300 356-15 V4.2.1:2004

ETSIETSIEN300356-15V4.2.1(2001-07)4Part17:"CallWaiting(CW)supplementaryservice[ITU-TRecommendationQ.733,clause1(1992)modified]";Part18:"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)neededtosupportthediversionsupplementaryservices.Thestage1andstage2aspectsaredetailedinETS300199[3]toETS300202[4]andETS300203[5]toETS300206[6],respectively.NationaltranspositiondatesDateofadoptionofthisEN:13July2001DateoflatestannouncementofthisEN(doa):31October2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):30April2002DateofwithdrawalofanyconflictingNationalStandard(dow):30April2002EndorsementnoticeTheelementsofITU-TRecommendationQ.732,clauses2to5(1999)apply,withthefollowingmodifications.NOTE:Newormodifiedtextisindicatedusingsidebars.Inaddition,underliningand/orstrike-outareusedtohighlightdetailedmodificationswherenecessary.SIST EN 300 356-15 V4.2.1:2004

ETSIETSIEN300356-15V4.2.1(2001-07)5GlobalmodificationstoITU-TRecommendationQ.732,clauses2to5Insertthefollowingtwoclauses(ScopeandReferences)atthestartofclause2.ScopeThepresentdocumentspecifiesthestagethreeofthediversionsupplementaryservicesforthepan-EuropeanIntegratedServicesDigitalNetwork(ISDN)asprovidedbytheEuropeanpublictelecommunicationsoperatorsbymeansoftheSignallingSystemNo.7protocolfortheISDNUserPart(ISUP).Stagethreeidentifiestheprotocolproceduresandswitchingfunctionsneededtosupportatelecommunicationservice(seeITU-TRecommendationI.130[1]).ThepresentdocumentdoesnotspecifytheadditionalprotocolrequirementswheretheserviceisprovidedtotheuserviaatelecommunicationsnetworkthatisnotanISDN.Thepresentdocumentdoesnotspecifytheadditionalprotocolrequirementsforthenationalsignallinginterface.Althoughthepresentdocumentappliesonlytotheinternationalinterconnection,thespecificationoffunctions,formatsandcodesofmessagesandsignals,andactionsperformedatoriginatinganddestinationlocalexchangesareretained.Formats,codesandproceduresmarkedfornationaluseareincludedforinformativepurposesfortheinternationalinterfacespecification.Iftheseitemssomarkedaresupportedwithinanationalnetworkandoperator'snetwork,thenitisproposedthattheyshallbesupportedinthismanner.NOTE:Inthecasewhereanationalsignallingsystembehavesdifferently,theinternationalgatewayexchangeistosupportboththeconcernednationalandinternationalnetwork.Thediversionsupplementaryservicesareapplicabletoallcircuit-switchedtelecommunicationservices.ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublicationand/oreditionnumberorversionnumber)ornon
...