SIST EN 300 356-17 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 300 356-17 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 17: Call Waiting (CW) supplementary service [ITU-T Recommendation Q.733, clause 1 (1992) modified]

SIST EN 300 356-17 V4.1.2:2004 is the Slovenian adoption of the ETSI standard for the Call Waiting (CW) supplementary service in the Integrated Services Digital Network (ISDN) over Signalling System No.7 (SS7) using the ISDN User Part (ISUP). It specifies the stage 3 protocol procedures and switching functions for the international interface, for European public telecommunications operators and the systems that interconnect their networks.

What does SIST EN 300 356-17 V4.1.2:2004 specify?

SIST EN 300 356-17 V4.1.2:2004 specifies the CW supplementary service at stage 3, meaning the signalling and switch behavior needed to implement the service in the network. The standard is an ETSI endorsement of ITU-T Recommendation Q.733, clause 1, with modifications for the pan-European ISDN environment.

The document is organized as an endorsement notice plus the modified ITU-T text. Its main content adds a scope statement, a references section, reference replacements, subclause changes, and one informative annex.

Annex	What it covers
Annex ZA	Coding of the compatibility information for the generic notification parameter

What are the key requirements of SIST EN 300 356-17 V4.1.2:2004?

The standard defines how CW is handled on the international ISUP interface. In practice, implementers use it to make sure an exchange can signal a waiting call and support the correct user response.

• The CW service notifies a subscriber of an incoming call when no interface information channel is available. The subscriber can then accept, reject, or ignore the waiting call, so the network must present the call-waiting indication at the right point in call handling.
• The standard applies to the international interconnection side of ISUP. It does not extend the service to a non-ISDN access network or to the national signalling interface, which matters when a network operator must separate international behavior from local or national behavior.
• Functions, message formats, codes, and exchange actions at originating and destination local exchanges are retained. This means gateways and exchanges still need to support the same signalling elements even though the document is only for the international interface.
• Items marked for national use are included for informative purposes in the international specification. If a national network and operator network support them, the document proposes that they be supported in that same way, which affects interoperability planning.
• If the national network does not support CW, the outgoing international gateway exchange discards the corresponding Generic notification indicator parameter and completes the call using the basic call procedure. This is a key interoperability rule for mixed-network operation.
• The text states that no exceptional procedures are identified in one modified subclause, and that two other modified subclauses have no impact on ISUP. For implementers, this narrows the amount of special-case handling needed in the signalling logic.
• When interworking with networks that do not provide CW, the notification is lost. Operators should therefore not assume the CW indication will survive across every interconnection.
• Annex ZA gives the compatibility coding for the Generic notification parameter, including the instruction indicators. This supports consistent implementation of parameter handling in exchanges.

What terms does SIST EN 300 356-17 V4.1.2:2004 define?

Integrated Services Digital Network (ISDN) is the digital network environment in which the supplementary service is carried.

Signalling System No.7 (SS7) is the signalling system used to carry call-control information between network exchanges.

ISDN User Part (ISUP) is the SS7 part that handles ISDN call-related signalling on the international interface.

Call Waiting (CW) is the supplementary service that alerts a subscriber to another incoming call while an existing call is in progress.

Generic notification parameter is the ISUP parameter used for the CW notification handling described in the modified text and Annex ZA.

International gateway exchange is the exchange that must bridge national and international signalling behavior when the national network does not support CW.

Who uses SIST EN 300 356-17 V4.1.2:2004?

SIST EN 300 356-17 V4.1.2:2004 is used by telecommunications operators, especially those running pan-European ISDN and international gateways. It also matters to switch vendors, signalling engineers, and network integrators who implement ISUP behaviour for CW.

Test and quality teams use it to check interworking between networks that do and do not support CW. Procurement and technical evaluation teams use it to compare network equipment against the required ISUP behaviour for the international interface.

Which standards are used with SIST EN 300 356-17 V4.1.2:2004?

The standard cites ITU-T Recommendation I.130 for the three-stage method used to describe telecommunication services. It uses ETS 300 056 for the stage 1 service description of CW and ETS 300 057 for the stage 2 functional capabilities and information flows.

It also refers to EN 300 058-1 for the DSS1 protocol for CW, ETS 300 121 for earlier ISUP-based international ISDN interconnection, EN 300 356-1 for ISUP version 4 basic services, EN 300 356-2 for ISUP version 4 ISDN supplementary service, and EN 300 403-1 for the DSS1 signalling network layer for circuit-mode basic call control.

What does the SIST EN 300 356-17 V4.1.2:2004 document contain?

The document contains the ETSI endorsement text for ITU-T Recommendation Q.733, clause 1, with specific wording changes for CW. It also contains a table of reference substitutions and several subclause-level replacements that control how gateways and exchanges behave.

Annex ZA adds the compatibility coding guidance for the Generic notification parameter. Together, these parts support implementation, interworking, and conformance checking for CW signalling on the international ISUP interface.

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 17: Call Waiting (CW) supplementary service [ITU-T Recommendation Q.733, clause 1 (1992) modified]33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:EN 300 356-17 Version 4.1.2SIST EN 300 356-17 V4.1.2:2004en01-april-2004SIST EN 300 356-17 V4.1.2:2004SLOVENSKI
STANDARD
ETSIEN300356-17V4.1.2(2001-07)EuropeanStandard(Telecommunicationsseries)IntegratedServicesDigitalNetwork(ISDN);SignallingSystemNo.7(SS7);ISDNUserPart(ISUP)version4fortheinternationalinterface;Part17:CallWaiting(CW)supplementaryservice[ITU-TRecommendationQ.733,clause1(1992)modified]SIST EN 300 356-17 V4.1.2:2004

ETSIETSIEN300356-17V4.1.2(2001-07)2ReferenceREN/SPAN-01082-17KeywordsISDN,ISUP,SS7,supplementaryservice,CW,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 300 356-17 V4.1.2:2004

ETSIETSIEN300356-17V4.1.2(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).Thepresentdocumentispart17ofamulti-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 300 356-17 V4.1.2:2004

ETSIETSIEN300356-17V4.1.2(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)neededtosupporttheCallWaiting(CW)supplementaryservice.Thestage1andstage2aspectsaredetailedinETS300056[2]andETS300057[3],respectively.Nationaltranspositionda
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