SIST EN 300 356-17 V3.1.3:2003

• Abstract:

  Additional generic procedures to those in basic call for use in this supplementary service.

• 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 300 356-17 V3.1.3 (1998-08) - Integrated Services Digital Network (ISDN); Signalling System No.7; ISDN User Part (ISUP) version 3 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 V3.1.3:2003 is the Slovenian adoption of ETSI EN 300 356-17 V3.1.3, issued by SIST. It specifies the stage 3 signalling procedures and switching functions for the Call Waiting (CW) supplementary service in the Integrated Services Digital Network (ISDN) using Signalling System No.7 (SS7) and the ISDN User Part (ISUP) for the international interface.

What does SIST EN 300 356-17 V3.1.3:2003 specify?

SIST EN 300 356-17 V3.1.3:2003 specifies the stage 3 description of Call Waiting (CW) for pan-European ISDN interconnection. In practice, that means the document focuses on protocol behavior and switching functions between networks, not on the user-facing service description itself.

The scope is limited to the international interface. It keeps the actions at originating and destination local exchanges, but it sets aside extra protocol requirements for a national signalling interface and for delivery of the service over a non-ISDN network.

The document is organized around the modified text of ITU-T Recommendation Q.733, clause 1, with inserted scope and normative references text at the start of clause 1. It also includes one informative annex.

Annex	What it covers
ZA (informative)	Coding of the compatibility information for the generic notification parameter and instruction indicators

What are the key requirements of SIST EN 300 356-17 V3.1.3:2003?

SIST EN 300 356-17 V3.1.3:2003 defines how CW behaves when an incoming call arrives and no interface information channel is available. The subscriber is notified of the waiting call and can accept, reject or ignore it, using the same basic call procedures that the service relies on.

Service scope and interworking

The document applies the CW service to the telephony teleservice and to the speech and 3,1 kHz audio bearer services. That tells implementers where the service is meant to make sense and where signaling support should be provided.

Interworking with networks that do not provide CW is handled simply: the notification is lost. For a network that does not support CW at the national side, the outgoing international gateway exchange discards the corresponding Generic notification indicator parameter and completes the call by the basic call procedure.

Signalling and exchange behavior

The text keeps the functions, formats, codes and procedures for originating and destination local exchanges in the international-interface description, even when some items are marked for national use. That matters because gateway and exchange equipment still needs consistent signaling behavior at the borders between networks.

Several subclauses are aligned by replacing wording such as “succeeding” with “preceding,” and two subclauses are stated as having no impact on ISUP. In practice, this signals that the CW handling is tightly scoped and does not change the wider ISUP framework beyond the defined procedures.

Compatibility information

Annex ZA gives the recommended coding for compatibility information linked to the generic notification parameter. This is useful for implementers who need to map the service into actual protocol fields and ensure the correct treatment of notification-related indicators.

What terms does SIST EN 300 356-17 V3.1.3:2003 define?

• Integrated Services Digital Network (ISDN) - The network environment for which this CW signalling specification is written.
• Signalling System No.7 (SS7) - The signalling system used to carry ISUP messages between networks.
• ISDN User Part (ISUP) - The SS7 user part that carries ISDN call-control signaling on the international interface.
• Call Waiting (CW) - The supplementary service that alerts a subscriber to an incoming call while another call is active or pending handling.
• Generic notification indicator parameter - The parameter used in the compatibility information to carry notification-related handling for CW.
• International gateway exchange - The exchange that bridges national and international networks and applies the interworking behavior defined here.

Who uses SIST EN 300 356-17 V3.1.3:2003?

SIST EN 300 356-17 V3.1.3:2003 is used by telecommunications operators, signalling engineers, and switch vendors working on ISDN interconnection. It is also relevant to network integration teams that have to make CW work across international gateways.

Test and conformance teams use it to check that implementations follow the defined stage 3 behavior for CW, especially when a call crosses between networks with different support for the service. Quality and interoperability teams use it to confirm that exchange behavior matches the international-interface rules.

What changed in SIST EN 300 356-17 V3.1.3:2003 from the previous edition?

The history shows an earlier publication as ETS 300 356-17 V3.1.1, followed by a vote and publication as V3.1.3. This edition presents ITU-T Recommendation Q.733, clause 1 (1992), as an EN with agreed modifications.

The listed changes add the Scope and Normative references clauses, update reference mappings throughout clause 1, replace several subclause wordings, and add informative Annex ZA for compatibility information coding.

Which standards are used with SIST EN 300 356-17 V3.1.3:2003?

• CCITT Recommendation I.130 - The method used to characterize telecommunications services and the three-stage model referenced by this CW specification.
• ETS 300 056 - Gives the stage 1 service description for CW.
• ETS 300 057 - Gives the stage 2 functional capabilities and information flows for CW.
• ETS 300 058-1 - Gives the DSS1 protocol specification for CW.
• ETS 300 121 - Provides the ISUP version 1 reference used in the replacement mapping.
• EN 300 356-1 - Provides the basic services part of ISUP version 3 for the international interface.
• EN 300 356-2 - Provides the ISDN supplementary services part of ISUP version 3.
• EN 300 403-1 - Provides the DSS1 protocol reference for circuit-mode basic call control.

What does the SIST EN 300 356-17 V3.1.3:2003 document contain?

This document contains the modified text of clause 1 from ITU-T Recommendation Q.733, plus inserted scope and normative reference text and the reference-replacement mapping used to align the CW procedures with the EN 300 356 family. It also includes Annex ZA, which gives the recommended coding for compatibility information related to the Generic notification indicator parameter.

For implementers, the practical value is in the signaling behavior, the interworking rules, and the compatibility coding guidance. For readers checking applicability, the document shows that CW is specified for international ISDN interconnection and is tied to the stage 3 protocol and switching functions rather than the service definition itself.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.VSUHPHQMHQR@Integrated Services Digital Network (ISDN); Signalling System No.7; ISDN User Part (ISUP) version 3 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 3.1.3SIST EN 300 356-17 V3.1.3:2003en01-december-2003SIST EN 300 356-17 V3.1.3:2003SLOVENSKI
STANDARD
EN 300 356-17 V3.1.3 (1998-08)European Standard (Telecommunications series)Integrated Services Digital Network (ISDN);Signalling System No.7;ISDN User Part (ISUP) version 3 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 V3.1.3:2003

ETSIEN 300 356-17 V3.1.3 (1998-08)2ReferenceREN/SPS-01039-17 (3as91ie0.PDF)KeywordsISDN, ISUP, SS7, supplementary service, CWETSIPostal 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.frhttp://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 300 356-17 V3.1.3:2003

ETSIEN 300 356-17 V3.1.3 (1998-08)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.fr/ipr or 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 17 of a multi-part EN covering the ISDN User Part (ISUP) version 3 for the internationalinterface, as identified below:Part 1:"Basic services";Part 2:"ISDN supplementary services";Part 3:"Calling Line Identification Presentation (CLIP) supplementary service";Part 4:"Calling Line Identification Restriction (CLIR) supplementary service";Part 5:"Connected Line Identification Presentation (COLP) supplementary service";Part 6:"Connected Line Identification Restriction (COLR) supplementary service";Part 7:"Terminal Portability (TP) supplementary service";Part 8:"User-to-User Signalling (UUS) supplementary service";Part 9:"Closed User Group (CUG) supplementary service";Part 10:"Subaddressing (SUB) supplementary service";Part 11:"Malicious Call Identification (MCID) supplementary service";Part 12:"Conference Call, add-on (CONF) supplementary service";Part 14:"Explicit Call Transfer (ECT) supplementary service";Part 15:"Diversion supplementary services";Part 16:"Call Hold (HOLD) supplementary service";Part 17:"Call Waiting (CW) supplementary service";Part 18:"Completion of Calls to Busy Subscriber (CCBS) supplementary service";Part 19:"Three party (3PTY) supplementary service".Part 20:"Completion of Calls on No Reply (CCNR) supplementary service";Part 31:"Protocol Implementation Conformance Statement (PICS) proforma specification for basic services"Part 32:"Test Suite Structure and Test Purposes (TSS&TP) specification for basic services"Part 33:"Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT)proforma specification for basic services"Part 34:"Protocol Implementation Conformance Statement (PICS) proforma specification for supplementaryservices"Part 35:"Test Suite Structure and Test Purposes (TSS&TP) specification for supplementary services"Part 36:"Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT)proforma specification for supplementary services"NOTE:Part 13 has not been issued.SIST EN 300 356-17 V3.1.3:2003

ETSIEN 300 356-17 V3.1.3 (1998-08)4In accordance with CCITT Recommendation I.130, the following three level structure is used to describe thesupplementary telecommunication services as provided by European public telecommunications operators under thepan-European Integrated Services Digital Network (ISDN):-Stage 1: is an overall service description, from the user's stand-point;-Stage 2: identifies the functional capabilities and information flows needed to support the service described instage 1; and-Stage 3: defines the signalling system protocols and switching functions needed to implement the servicedescribed in stage 1.The present document details the stage three aspects (signalling system protocols and switching functions) needed tosupport the Call Waiting (CW) supplementary service. The stage 1 and stage 2 aspects are detailed in ETS 300 056 andETS 300 057, respectively.National transposition datesDate of adoption of this EN:7 August 1998Date of latest announcement of this EN (doa):30 November 1998Date of latest publication of new National Standardor endorsement of this EN (dop/e):31 May 1999Date of withdrawal of any conflicting National Standard (dow):31 May 1999Endorsement noticeThe text of ITU-T Recommendation Q.733, clause 1 (1992), was approved by ETSI as an EN with agreed modificationsas given below.SIST EN 300 356-17 V3.1.3:2003

ETSIEN 300 356-17 V3.1.3 (1998-08)5Global modifications to ITU-T Recommendation Q.733,clause 1Insert the following two clauses (Scope and Normative references) at the start of clause 1:ScopeThis seventeenth part of EN 300 356 specifies the stage three of the Call Waiting (CW) supplementary service for thepan-European Integrated Services Digital Network (ISDN) as provided by the European public telecommunicationsoperators by means of the Signalling System No.7 protocol for the ISDN User Part (ISUP). Stage three identifies theprotocol procedures and switching functions
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