SIST EN 301 485-1 V1.1.1:2005

• Abstract:

  Endorsement of a new ITU-T Recommendation Q.2951.9

• 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 301 485-1 V1.1.1 (2000-09) - Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; Support of ATM end system addressing format by Number identification supplementary services; Part 1: Protocol specification [ITU-T Recommendation Q.2951.9 (1999) modified]

ETSI EN 301 485-1 V1.1.1 is the European standard that endorses ITU-T Recommendation Q.2951.9 for Broadband Integrated Services Digital Network (B-ISDN) signalling. It specifies the stage three protocol for supporting ATM end system addressing format by Number identification supplementary services, using the Digital Subscriber Signalling System No. two (DSS2) protocol.

What does SIST EN 301 485-1 V1.1.1:2005 specify?

SIST EN 301 485-1 V1.1.1:2005 specifies the protocol specification for the support of ATM end system addressing format by Number identification supplementary services in pan-European B-ISDN. It is the stage-three part, so it focuses on the protocol procedures and switching functions needed to provide the telecommunications service.

The standard applies at the TB reference point, and also at coincident SB and TB reference points when those are used as access to the public B-ISDN. It is also written for equipment supporting connection-oriented basic B-ISDN telecommunication services on either side of a TB reference point.

The document is organized as an endorsement of ITU-T Recommendation Q.2951.9, with a scope clause, a references clause, and a definitions and abbreviations clause. It also includes the ETSI modifications that apply to the ITU-T text.

What are the key requirements of SIST EN 301 485-1 V1.1.1:2005?

SIST EN 301 485-1 V1.1.1:2005 requires implementers to follow the stage-three DSS2 procedures for the service at the TB reference point. In practice, this means the standard is about how the signalling behaves on the network interface, not about service marketing, terminal design, or user features.

Scope and applicability

The scope states that the document covers the protocol procedures and switching functions needed to support the service. It also limits the applicability to equipment attached at the TB reference point, or at coincident SB and TB reference points used to access the public B-ISDN.

For engineers, this means the standard is relevant when designing or checking interworking at the user-network interface. For buyers and quality managers, it tells you whether the product or system is intended to connect in the right B-ISDN access scenario.

Relationship to basic telecommunication services

The scope notes that a basic telecommunications service is the foundation on which supplementary services are added. It also says that specific requirements for individual B-ISDN connection-oriented basic telecommunication services are not covered here.

That matters because the document is not a general B-ISDN service specification. It is the signalling specification for one supplementary-service function, so you normally use it together with the related basic call/bearer control specification.

Conformance and companion parts

The document says that other parts provide the method of testing and the detailed application-specific requirements used to determine conformance. In practice, this tells implementers that protocol design alone is not enough - conformity is checked with separate testing and detailed application rules.

ETSI modifications to the ITU-T text

The endorsement notice replaces specific references in ITU-T Recommendation Q.2951.9 with ETSI-modified versions. It also states that where ITU-T uses the term “connection”, ETSI uses “bearer” in the context of a connection-oriented bearer service.

That is important for reading and implementation because the same functional idea may be described with different wording in ETSI documentation. It also helps avoid confusion when mapping the standard to code, test cases, or technical requirements.

What terms does SIST EN 301 485-1 V1.1.1:2005 define?

• ATM - Asynchronous Transfer Mode, the addressing format supported by the service.
• B-ISDN - Broadband Integrated Services Digital Network, the network environment addressed by the standard.
• DSS2 - Digital Subscriber Signalling System No. two, the signalling protocol used to provide the service.
• TB reference point - The interface point where the service is provided to the user in the B-ISDN setting.
• SB reference point - A reference point that can coincide with TB when used as access to the public B-ISDN.
• bearer - The ETSI term used in this document where ITU-T wording would use “connection” for a connection-oriented bearer service.
• CLIP - Calling Line Identification Presentation, one of the related DSS2 supplementary services cited in the references.
• CLIR - Calling Line Identification Restriction, another related supplementary service cited in the references.

Who uses SIST EN 301 485-1 V1.1.1:2005?

This standard is used by equipment manufacturers, protocol implementers, and network operators working with B-ISDN access and DSS2 signalling. It is also relevant to testers and conformance teams who need to verify behaviour at the TB reference point.

Quality managers and buyers use it to check whether a product is intended for connection-oriented basic B-ISDN telecommunication services and the related supplementary-service signalling. It is most relevant where ATM end system addressing and Number identification supplementary services must interoperate on the public B-ISDN interface.

Which standards are used with SIST EN 301 485-1 V1.1.1:2005?

The document uses ITU-T Recommendation I.130 for the characterization of telecommunication services and network capabilities, and ITU-T Recommendation I.413 for the B-ISDN user-network interface. These references set the service and interface context for the DSS2 procedures.

It also depends on EN 300 443 for basic call/bearer control, and on ETS 300 661, ETS 300 662, ETS 300 663, ETS 300 664, ETS 300 665, and ETS 300 666 for the related supplementary services. The references cover Direct Dialling In (DDI), Multiple Subscriber Number (MSN), Calling Line Identification Presentation (CLIP), Calling Line Identification Restriction (CLIR), Connected Line Identification Presentation (COLP), and Connected Line Identification Restriction (COLR).

What does the SIST EN 301 485-1 V1.1.1:2005 document contain?

The document contains the endorsement notice for ITU-T Recommendation Q.2951.9 and the ETSI-specific modifications applied to it. It also includes the reference list and a table showing which ITU-T references are replaced by ETSI-modified companion standards.

The text gives the scope, the context for the B-ISDN service, and the note that ETSI uses “bearer” where ITU-T uses “connection” in this setting. It is therefore a protocol and conformity reference, not a worked design guide.

Its structure is compact and focused on interoperability. Readers use it to understand what the stage-three DSS2 specification covers, which related standards it depends on, and how the ETSI wording differs from the ITU-T original.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.HQMHQR@Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; Support of ATM end system addressing format by Number identification supplementary services; Part 1: Protocol specification [ITU-T Recommendation Q.2951.9 (1999) modified]33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:EN 301 485-1 Version 1.1.1SIST EN 301 485-1 V1.1.1:2005en01-januar-2005SIST EN 301 485-1 V1.1.1:2005SLOVENSKI
STANDARD
ETSIEN301485-1V1.1.1(2000-09)EuropeanStandard(Telecommunicationsseries)BroadbandIntegratedServicesDigitalNetwork(B-ISDN);DigitalSubscriberSignallingSystemNo.two(DSS2)protocol;SupportofATMendsystemaddressingformatbyNumberidentificationsupplementaryservices;Part1:Protocolspecification[ITU-TRecommendationQ.2951.9(1999),modified]SIST EN 301 485-1 V1.1.1:2005

ETSIETSIEN301485-1V1.1.1(2000-09)2ReferenceDEN/SPAN-05216-1KeywordsATM,B-ISDN,DSS2,supplementaryserviceETSI650RoutedesLuciolesF-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.©EuropeanTelecommunicationsStandardsInstitute2000.Allrightsreserved.SIST EN 301 485-1 V1.1.1:2005

ETSIETSIEN301485-1V1.1.1(2000-09)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).NationaltranspositiondatesDateofadoptionofthisEN:25August2000DateoflatestannouncementofthisEN(doa):30November2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31May2001DateofwithdrawalofanyconflictingNationalStandard(dow):31May2001SIST EN 301 485-1 V1.1.1:2005

ETSIETSIEN301485-1V1.1.1(2000-09)4EndorsementnoticeTheelementsofITU-TRecommendationQ.2951.9(1999),apply,withthefollowingmodifications:Page1,clause9.1Replaceclause9.1by:1ScopeThepresentdocumentspecifiesthestagethreeofSupportofATMendsystemaddressingformatbyNumberidentificationsupplementaryservicesforthepan-EuropeanBroadbandIntegratedServicesDigitalNetwork(B-ISDN)asprovidedattheTBreferencepointorcoincidentSBandTBreferencepoints(asdefinedinITU-TRecommendationI.413[18])bymeansoftheDigitalSubscriberSignallingSystemNo.two(DSS2)protocol.Stagethreeidentifiestheprotocolproceduresandswitchingfunctionsneededtosupportatelecommunicationsservice(seeCCITTRecommendationI.130[10]).Inaddition,thepresentdocumentspecifiestheprotocolrequirementsattheTB
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