SIST EN 300 443-1 V1.3.5:2003

• Abstract:

  Inclusion of changes which appear on the ITU-T living list of modifications to Q.2931 after the spring 1997 SG11 meeting and possible impact on the PICS (if any).

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.080 - Integrated Services Digital Network (ISDN)
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Ref Project: ETSI EN 300 443-1 V1.3.5 (1998-10) - Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; B-ISDN user-network interface layer 3 specification for basic call/bearer control; Part 1: Protocol specification [ITU-T Recommendation Q.2931 (1995), modified]

SIST EN 300 443-1 V1.3.5:2003 is the Slovenian adoption of ETSI EN 300 443-1 V1.3.5 for Broadband Integrated Services Digital Network (B-ISDN) signalling. It specifies the Digital Subscriber Signalling System No. two (DSS2) layer 3 protocol for basic call and bearer control at the B-ISDN user-network interface, as a modified version of ITU-T Recommendation Q.2931 (1995). It is intended for equipment that supports connection-oriented basic B-ISDN telecommunication services at the TB reference point or a coincident SB and TB reference point.

What does SIST EN 300 443-1 V1.3.5:2003 specify?

SIST EN 300 443-1 V1.3.5:2003 specifies stage three procedures and switching functions for on-demand connection-oriented basic telecommunication services in pan-European B-ISDN. In practice, that means the document defines how the signalling protocol behaves so that equipment can set up, control, and release basic bearer services over the user-network interface.

The document also covers the protocol requirements when service is provided through a private B-ISDN, and it includes features for 64 kbit/s based circuit-mode ISDN services in B-ISDN plus access interworking between B-ISDN and N-ISDN. The foreword shows that it is part 1 of a multi-part standard. Parts 2 to 6 cover conformance statements, test purposes, abstract test suites, and PIXIT proformas for both user and network sides.

The standard is organized around the protocol specification itself, supporting references, protocol procedures, information elements, timers, and annexes. The annex set includes normative annexes A, B, C, D, E, F, I, J and K, plus informative Annex L and informative Appendices I and II.

What are the key requirements of SIST EN 300 443-1 V1.3.5:2003?

The core requirement is that implementations follow the modified ITU-T Q.2931 protocol text, including the ETSI changes listed in the endorsement notice. That matters because conformance is judged against the ETSI-modified version, not the unmodified ITU-T text.

A central control rule concerns the Broadband sending complete information element. In en bloc sending, the user shall include it in SETUP, and on receipt the network shall apply the en bloc sending procedure. If the network includes it, the user shall apply the en bloc receiving procedure. This affects call establishment behavior and interworking between terminal and network implementations.

The document also tightens information element encoding rules. Several notes add maximum lengths of 25 octets or 26 octets, and the Broadband low layer information element must send octets 5, 6 and 7 in the stated order if present. For implementers, these details determine how to build and validate protocol messages on the wire.

Some address and numbering details are clarified. The type of number "unknown" is defined for cases where neither side knows the numbering type, and the addressing/numbering plan codepoint "0 0 1 0" is changed to reserved. The figures also remove unsupported NSAP address octets. This matters for address parsing and for message validation.

The standard adds a practical note for end-to-end OAM F5 flows. When a user needs those flows, the OAM traffic descriptor should declare that explicitly so the network can identify the actual user plane information rates and apply policing and shaping correctly. That is important where the network separates user plane and OAM handling.

User-side timer T301 is made optional. Implementers therefore need to decide whether their equipment uses that timer and, if it does, include the related behavior in conformance testing and declarations.

What terms does SIST EN 300 443-1 V1.3.5:2003 define?

• Broadband Integrated Services Digital Network (B-ISDN) - The broadband ISDN environment covered by the standard.
• Digital Subscriber Signalling System No. two (DSS2) - The signalling protocol used for the B-ISDN user-network interface.
• User-network interface (UNI) - The interface at the TB reference point where user equipment connects to the network.
• Protocol Implementation Conformance Statement (PICS) - The proforma used to state what protocol features an implementation supports.
• Operations, administration and maintenance (OAM) - The management functions carried over the bearer, including the F5 flow referenced in the standard.
• OAM F5 flow - An end-to-end OAM flow whose declaration is relevant for user plane rate handling.
• Bearer - ETSI’s term used in this document in place of "connection" for connection-oriented bearer service.

Who uses SIST EN 300 443-1 V1.3.5:2003?

SIST EN 300 443-1 V1.3.5:2003 is used by equipment manufacturers, protocol engineers, network operators, and conformance test teams working on B-ISDN access equipment. It is also relevant to quality managers and buyers who need to check whether a product supports the required DSS2 bearer-control behavior.

In practice, users apply it when designing signalling software, checking interoperability at the TB reference point, preparing PICS declarations, and building or running test suites for user and network implementations.

What changed in SIST EN 300 443-1 V1.3.5:2003 from the previous edition?

SIST EN 300 443-1 V1.3.5:2003 incorporates the 1997 amendment to ITU-T Recommendation Q.2931 into the ETSI endorsement. The change set is aimed at bringing the protocol text in line with the updated Broadband bearer capability definition.

The main technical change is that the Broadband bearer capability clause is replaced by a reference to ITU-T Recommendation Q.2961.2. That recommendation restructures octet 5a to support ATM transfer capabilities while keeping backward compatibility with earlier Q.2931 meanings.

The edition also adds clarifications on sending complete handling, OAM F5 declaration, low layer information ordering, information element length limits, numbering plan coding, and the optional status of timer T301. The scope notes that these changes may affect PICS material.

Which standards are used with SIST EN 300 443-1 V1.3.5:2003?

• CCITT Recommendation I.130 - Characterizes the telecommunication services supported by ISDN and network capabilities.
• ETS 300 402-2 - Provides the DSS1 data link layer protocol used as a reference for related signalling behavior.
• EN 300 403-1 - Provides the DSS1 signalling network layer for circuit-mode basic call control.
• ETS 300 436-1 - Provides the SAAL SSCOP protocol used to support signalling at the UNI.
• ETS 300 437-1 - Provides the SAAL SSCF for support of signalling at the UNI.
• ETS 300 486-1 - Provides the B-ISDN meta-signalling protocol.
• EN 301 068-1 - Provides connection characteristics and ATM transfer capability and traffic parameter indication.
• Parts 2 to 6 of EN 300 443 - Provide PICS, TSS&TP, ATS, and PIXIT material for user and network conformance work.

What does the SIST EN 300 443-1 V1.3.5:2003 document contain?

The document contains the protocol specification text, detailed notes on information element coding, message handling rules, and timer behavior. It also includes tables that define protocol details such as information element lengths, codepoints, and timer applicability.

It contains figures and tables used to describe protocol encodings and message structures, plus normative annexes that support implementation and conformance work. The supporting material is arranged so that implementers can turn the protocol text into interoperable signalling behavior and testable declarations.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.MHQR@Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; B-ISDN user-network interface layer 3 specification for basic call/bearer control; Part 1: Protocol specification [ITU-T Recommendation Q.2931 (1995), modified]33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:EN 300 443-1 Version 1.3.5SIST EN 300 443-1 V1.3.5:2003en01-december-2003SIST EN 300 443-1 V1.3.5:2003SLOVENSKI
STANDARD
EN 300 443-1 V1.3.5 (1998-10)European Standard (Telecommunications series)Broadband Integrated Services Digital Network (B-ISDN);Digital Subscriber Signalling System No. two (DSS2) protocol;B-ISDN user-network interface layer 3 specificationfor basic call/bearer control;Part 1: Protocol specification[ITU-T Recommendation Q.2931 (1995), modified]SIST EN 300 443-1 V1.3.5:2003

ETSIEN 300 443-1 V1.3.5 (1998-10)2ReferenceREN/SPS-05136-1 (43o90j3c.PDF)KeywordsB-ISDN, DSS2, UNI, layer 3, basicETSIPostal addressF-06921 Sophia Antipolis Cedex - FRANCEOffice address650 Route des Lucioles - Sophia AntipolisValbonne - FRANCETel.: [phone]
Fax: [phone]Siret N° 348 623 562 00017 - NAF 742 CAssociation à but non lucratif enregistrée à laSous-Préfecture de Grasse (06) N° 7803/[e-mail]://www.etsi.orgCopyright NotificationNo part may be reproduced except as authorized by written permission.The copyright and the foregoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1998.All rights reserved.SIST EN 300 443-1 V1.3.5:2003

ETSIEN 300 443-1 V1.3.5 (1998-10)3Intellectual Property RightsIPRs essential or potentially essential to the present document may have been declared to ETSI. The informationpertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be foundin SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respectof ETSI standards", which is available free of charge from the ETSI Secretariat. Latest updates are available on theETSI Web server (http://www.etsi.org/ipr).Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guaranteecan be given as to the existence of other IPRs not referenced in SR 000 314 (or the updates on the ETSI Web server)which are, or may be, or may become, essential to the present document.ForewordThis European Standard (Telecommunications series) has been produced by ETSI Technical Committee SignallingProtocols and Switching (SPS).The present document is part 1 of a multi-part standard covering the specification of the Broadband Integrated ServicesDigital Network (B-ISDN) user-network interface layer 3 protocol for basic call/bearer control of Digital SubscriberSignalling System No. two (DSS2) as described below:Part 1: "Protocol specification [ITU-T Recommendation Q.2931 (1995), modified]";Part 2: "Protocol Implementation Conformance Statement (PICS) proforma specification".Part 3: "Test Suite Structure and Test Purposes (TSS&TP) specification for the user";Part 4: "Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT)proforma specification for the user";Part 5: "TSS&TP specification for the network";Part 6: "ATS and partial PIXIT proforma specification for the network".National transposition datesDate of adoption of this EN: 30 October 1998Date of latest announcement of this EN (doa): 31 January 1999Date of latest publication of new National Standardor endorsement of this EN (dop/e): 31 July 1999Date of withdrawal of any conflicting National Standard (dow): 31 July 1999SIST EN 300 443-1 V1.3.5:2003

ETSIEN 300 443-1 V1.3.5 (1998-10)4Endorsement noticeThe elements of ITU-T Recommendation Q.2931 (1995), apply, with the following modifications:NOTE:New or modified text is indicated using sidebars. In addition, underlining and/or strike-out are used tohighlight detailed modifications where necessary.Page 1, clause 1Replace clause 1 (excluding subclauses 1.1 to 1.3) by:1ScopeThe present document specifies the stage three of on-demand connection-oriented release 1 basic telecommunicationservices for the pan-European Broadband Integrated Services Digital Network (B-ISDN) as provided at the TB referencepoint or coincident SB and TB reference point (as defined in ITU-T Recommendation I.413 [19]) by means of theDigital Subscriber Signalling System No. two (DSS2) protocol. Stage three identifies the protocol procedures andswitching functions needed to support a telecommunications service (see CCITT Recommendation I.130 [59]).In addition, the present document specifies the protocol requirements at the TB reference point where the service isprovided to the user via a private B-ISDN.NOTE 1:Procedures at the TB reference point, to support the access of a private B-ISDN to the public B-ISDN, arenot explicitly identified in the present document, however, some procedures are applicable only at the TBreference point.The present document also specifies the particular features required to provide 64 kbit/s based circuit-mode ISDNservices in B-ISDN and to support access interworking between B-ISDN and N-ISDN.A basic telecommunications service is a fundamental type of service. It forms the basis on which supplementary servicesmay be added.NOTE 2:Specific requirements of individual B-ISDN connection-oriented basic telecommunication services are notcovered by the present document.Further parts of the present document provide the method of testing and detailed application specific requirements todetermine conformance to the present document.The present document is applicable to equipment supporting connection-oriented basic B-ISDN telecommunicationservices, to be attached at either side of a TB reference point or coincident SB and TB reference points when used as anaccess to the public B-ISDN.Page 1, subclause 1.1Replace the text of subclause 1.1 by:1.1.1Definitions and abbreviationsDefinitions and abbreviations are provided in clauses J.1 and J.2, respectively.1.1.2ReferencesThe following documents contain provisions which, through reference in this text, constitute provisions of the presentdocument.· References are either specific (identified by date of publication, edition number, version number, etc.) ornon-specific.· For a specific reference, subsequent revisions do not apply.SIST EN 300 443-1 V1.3.5:2003

ETSIEN 300 443-1 V1.3.5 (1998-10)5· For a non-specific reference, the latest version applies.· A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the samenumber.[59]CCITT Recommendation I.130 (1988): "Method for the characterization of telecommunicationservices supported by an ISDN and network capabilities of an ISDN".[60]ETS 300 402-2: "Integrated Services Digital Network (ISDN); Digital Subscriber SignallingSystem No. one (DSS1) protocol; Data link layer; Part 2: General protocol specification [ITU-TRecommendation Q.921 (1993), modified]".[61]EN 300 403-1: "Integrated Services Digital Network (ISDN); Digital Subscriber Signalling SystemNo. one (DSS1) protocol; Signalling network layer for circuit-mode basic call control; Part 1:Protocol specification [ITU-T Recommendation Q.931 (1993), modified]".[62]ETS 300 436-1: "Broadband Integrated Services Digital Network (B-ISDN); Signalling ATMAdaptation Layer (SAAL); Service Specific Connection Oriented Protocol (SSCOP); Part 1:Protocol specification [ITU-T Recommendation Q.2110 (1995), modified]".[63]ETS 300 437-1: "Broadband Integrated Services Digital Network (B-ISDN); Signalling ATMAdaptation Layer (SAAL); Service Specific Co-ordination Function (SSCF) for support ofsignalling at the User-Network Interface (UNI); Part 1: Specification of SSCF at UNI [ITU-TRecommendation Q.2130 (1995), modified]".[64]ETS 300 486-1: "Broadband Integrated Services Digital Network (B-ISDN); Meta-signallingprotocol; Part 1: Protocol specification [ITU-T Recommendation Q.2120 (1995), modified]".[65]EN 301 068-1: "Broadband Integrated Services Digital Network (B-ISDN); Digital SubscriberSignalling System No. two (DSS2) protocol; Connection characteristics; ATM transfer capabilityand traffic parameter indication; Part 1: Protocol specification [ITU-T Recommendations Q.2961.1(1995), Q.2961.2 to Q.2961.4 (1997), modified]".Throughout the text of ITU-T Recommendation Q.2931Replace references as shown in the following table.Reference in ITU-TRecommendation Q.2931Modified referenceITU-T Recommendation Q.921ITU-T Recommendation Q.921 as modified by ETS 300 402-2 [60]ITU-T Recommendation Q.931ITU-T Recommendation Q.931 as modified by EN 300 403-1 [61]ITU-T Recommendation Q.2110ITU-T Recommendation Q.2110 as modified by ETS 300 436-1 [62]ITU-T Recommendation Q.2120ITU-T Recommendation Q.2120 as modified by E
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