SIST EN 300 356-15 V3.2.2:2003

• Abstract:

  Additional generic procedures to those in basic call for use in these supplementary services.

• 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 300 356-15 V3.2.2 (1998-08) - Integrated Services Digital Network (ISDN); Signalling System No.7; ISDN User Part (ISUP) version 3 for the international interface; Part 15: Diversion supplementary services [ITU-T Recommendation Q.732, clauses 2 to 5 (1997), modified]

SIST EN 300 356-15 V3.2.2:2003 is the Slovenian adoption of the ETSI standard for ISDN signalling on the international interface. It specifies stage three procedures for the ISDN User Part (ISUP) version 3 diversion supplementary services, so it is aimed at operators, switch vendors, and implementers who need the signalling and switching behavior for call diversion in circuit-switched ISDN networks.

What does SIST EN 300 356-15 V3.2.2:2003 specify?

SIST EN 300 356-15 V3.2.2:2003 specifies the stage three aspects of the diversion supplementary services for the pan-European Integrated Services Digital Network (ISDN) using Signalling System No.7 and ISUP. In practice, that means protocol procedures and switching functions for the international interface.

The standard is applied to all circuit-switched telecommunication services. It does not define extra protocol requirements for delivery through a non-ISDN network, and it does not define the additional protocol requirements for the national signalling interface.

The document follows the modified text of ITU-T Recommendation Q.732, clauses 2 to 5, and includes informative Annex ZA.

Annex	What it covers
ZA	Coding of the compatibility information

What are the key requirements of SIST EN 300 356-15 V3.2.2:2003?

The main requirements describe how diversion information is handled in ISUP messages and how gateway exchanges react when a call is diverted. The practical focus is on the numbers and indicators that must be checked, passed, mapped, or discarded during call setup and progress.

• Outgoing international gateway exchange checks - Clause 2.5.2.3.1 requires checking the original called number and the redirecting number in the Initial Address Message (IAM). This matters because the gateway has to recognize that the call has already been redirected before it leaves the network.

• Incoming international gateway exchange checks - Clause 2.5.2.4.1 requires the same number checks on the incoming side. The standard also states that passing the Redirection number depends on bilateral agreement, so interoperability may need operator agreements before that data is carried.

• Backward message mapping - Clause 2.5.2.4.1 requires mapping between Call Progress Message (CPG) and Address Complete Message (ACM) when CPG is used as the first backward message. This matters for networks that use different backward signalling sequences and need consistent progress reporting.

• Call diversion indication in ACM - Clause 2.5.2.1.1 updates the backward call indicator so that “call diversion may occur” can be shown when the call is not yet stable. That gives the far end a clearer progress indication during diversion handling.

• Event information and missing parameters - Clause 2.5.2.4.1 allows an incoming gateway to create missing generic notification or call diversion information from event information when the national network supports the relevant CPG event coding. In practice, this prevents loss of diversion context when messages cross network boundaries.

• Connected and generic number handling - Clause 2.6.3 states that the diverting exchange shall divert the Connected number and the Generic number, and the additional connected number if present. This is important for preserving the called party identity that downstream systems may use.

• Interaction with CCBS - Clause 2.6.19 points to EN 300 356-18 for interactions. Readers implementing multiple supplementary services need that companion part to avoid conflicting procedures.

What terms does SIST EN 300 356-15 V3.2.2:2003 define?

• Integrated Services Digital Network (ISDN) - A digital network for integrated telecommunication services; here it is the network context for the diversion procedures.
• Signalling System No.7 (SS7) - The signalling system used to carry call-control messages between network exchanges.
• ISDN User Part (ISUP) - The SS7 part that supports call control and related ISDN signalling.
• Initial Address Message (IAM) - The message that starts call setup and carries the numbers checked for diversion handling.
• Address Complete Message (ACM) - A backward message used during call setup and progress reporting.
• Call Progress Message (CPG) - A backward message used to report call progress information, including diversion-related event information.
• Calling Line Identification Presentation (CLIP) and Calling Line Identification Restriction (CLIR) - The supplementary services used as the model for some number-handling procedures in this part.

Who uses SIST EN 300 356-15 V3.2.2:2003?

Telecommunications operators use this standard when they configure international ISDN interconnects and gateway exchanges. Switch and signalling engineers use it to implement the message handling for diversion services, especially the checks and mappings around IAM, ACM, and CPG.

Equipment vendors and interoperability test teams use it to verify that their ISUP implementations carry redirecting and connected-number information in the expected way. Quality and network-assurance teams use it when they need to confirm that diversion behavior stays consistent across interconnected networks and bilateral arrangements.

Which standards are used with SIST EN 300 356-15 V3.2.2:2003?

The standard relies on CCITT Recommendation I.130 for the three-stage model of telecommunication services. It uses ETS 300 199 and ETS 300 202 for the stage 1 service descriptions of Call Forwarding Busy (CFB) and Call Deflection (CD), and ETS 300 203 and ETS 300 206 for their stage 2 functional capabilities and information flows.

It refers to EN 300 356-1 for basic services, EN 300 356-2 for the common ISDN supplementary-services framework, EN 300 356-3 and EN 300 356-4 for CLIP and CLIR procedures, and EN 300 356-18 for Completion of Calls to Busy Subscriber (CCBS) interactions. It also cites EN 300 403-1 for the circuit-mode basic call signalling network layer and ETS 300 121 for the earlier ISUP version 1 international interconnection reference.

What does the SIST EN 300 356-15 V3.2.2:2003 document contain?

The body of the document gives modified procedures for number checking, message mapping, parameter handling, and gateway behavior in diversion cases. It includes the replacement text for selected subclauses, a table that maps ITU-T references to their modified ETSI equivalents, and notes that refine how exchanges treat CPG, ACM, and related indicators.

Annex ZA provides recommended coding for the compatibility information of the call diversion information parameter, the generic notification parameter, and the redirection number restriction parameter. That annex is useful when implementing or checking parameter compatibility coding in signalling equipment.

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 15: Diversion supplementary services [ITU-T Recommendation Q.732, clauses 2 to 5 (1997), 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 3.2.2SIST EN 300 356-15 V3.2.2:2003en01-december-2003SIST EN 300 356-15 V3.2.2:2003SLOVENSKI
STANDARD
EN 300 356-15 V3.2.2 (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 15: Diversion supplementary services[ITU-T Recommendation Q.732, clauses 2 to 5 (1996), modified]SIST EN 300 356-15 V3.2.2:2003

ETSIEN 300 356-15 V3.2.2 (1998-08)2ReferenceREN/SPS-01039-15 (3arr1ipc.PDF)KeywordsISDN, ISUP, SS7, supplementary service,CFETSIPostal 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 300 356-15 V3.2.2:2003

ETSIEN 300 356-15 V3.2.2 (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 15 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 300 356-15 V3.2.2:2003

ETSIEN 300 356-15 V3.2.2 (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.This EN details the stage three aspects (signalling system protocols and switching functions) needed to support thediversion supplementary services. The stage 1 and stage 2 aspects are detailed in ETS 300 199 to ETS 300 202 andETS 300 203 to ETS 300 206, respectively.National transposition datesDate of adoption of this EN:31 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.732, clauses 2 to 5 (1996), was approved by ETSI as an EN with agreedmodifications as given below.NOTE:New or modified text is indicated using sidebars. In addition, underlining and/or strike-out are used tohighlight detailed modifications where necessary.SIST EN 300 356-15 V3.2.2:2003

ETSIEN 300 356-15 V3.2.2 (1998-08)5Global modifications to ITU-T Recommendation Q.732,clauses 2 to 5Insert the following two clauses (Scope and Normative references) at the start of clause 2:ScopeThis fifteenth part of EN 300 356 specifies the stage three of the diversion supplementary services for the pan-EuropeanIntegrated Services Digital Network (ISDN) as provided by the European public telecommunications operators bymeans of the Signalling System No.7 protocol for the ISDN User Part (ISUP). Stage three identifies the protocolprocedures and switching functions needed to support a telecommunication service(see CCITT Recommendation I.130 [1]).The present document does not specify the additional protocol requirements where the service is provided to the user viaa telecommunications network that is not an ISDN.The present document does not specify the additional protocol requirements for the national signalling interface.Although the present document applies only to the international interconnection, the specification of functions, formatsand codes of messages and signals, and actions performed at originating and destination local exchanges are retained.Formats, codes and procedures marked for national use are included for informative purposes for the internationalinterface specification. If these items so marked are supported within a national network and operator's network, then itis proposed that they shall be supported in this manner.NOTE:In the case where a national signalling system behaves differently, the international gateway exchange isto support both the concerned national and international network.The diversion supplementary services are applicable to all circuit-switched telecommunication services.ReferencesThe 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.· For a non-specific reference, subsequent revisions do apply.· A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the samenumber.[1]CCITT Recommendation I.130 (1988): "Method for the characterization of telecommunicationservices supported by an ISDN and network capabilities of an ISDN".[2]ETS 300 121 (1992): "Integrated Services Digital Network (ISDN); Application of the ISDN
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