SIST EN 300 356-9 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 300 356-9 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 9: Closed User Group (CUG) supplementary service [ITU-T Recommendation Q.735, clause 1 (1993) modified]

SIST EN 300 356-9 V4.1.2:2004 is the Slovenian adoption of ETSI EN 300 356-9 V4.1.2, a European telecommunications standard for the ISDN User Part (ISUP) version 4 on the international Signalling System No.7 (SS7) interface. It specifies the stage 3 signalling procedures and switching functions for the Closed User Group (CUG) supplementary service. In practice, it tells implementers how CUG support is carried over international ISDN interconnection.

What does SIST EN 300 356-9 V4.1.2:2004 specify?

SIST EN 300 356-9 V4.1.2:2004 specifies the stage 3 description of the CUG supplementary service for pan-European Integrated Services Digital Network (ISDN) using SS7 ISUP. Stage 3 is the protocol-and-switching level, so the document is about how the service is signalled and handled in the network.

The document is limited to the international interface. It keeps message formats, codes, procedures, and exchange actions that matter for that interface, while national-use items are retained only for informative purposes.

The structure is centered on clause 1 of ITU-T Recommendation Q.735, clause 1 (1993), with a scope section, a references section, and a set of global modifications.

What are the key requirements of SIST EN 300 356-9 V4.1.2:2004?

The standard ties CUG support to the three-level ISDN service model from ITU-T Recommendation I.130: stage 1 describes the service, stage 2 the functional capabilities and information flows, and stage 3 the signalling and switching functions. For implementers, this means the document is the protocol realization of the service, not the user-service description.

The CUG supplementary service forms groups with restricted access. A user may belong to one or more CUGs, and members of a given group can communicate among themselves but not, in general, with users outside the group.

The service is stated to apply to all telecommunication services. In practice, CUG is not tied to one call type; it is a service overlay that can be added where the ISDN/ISUP signalling supports it.

The scope keeps the international interconnection focus, but it retains the functions, formats, codes, and actions used at originating and destination local exchanges. If a national signalling system behaves differently, the international gateway exchange is expected to support both the national and international network sides.

Clause 1 modifies the reference set used by ITU-T Recommendation Q.735. For readers, this means CUG on ISUP version 4 must be read together with the named base documents for ISDN service description, functional capabilities, ISUP basic services, and DSS1 signalling.

The endorsement also removes specific items from Q.735 clause 1, including selected sub-items in subclauses 1.5.2.1.1 and 1.5.2.5.1, figures 1-2/Q.735 to 1-4/Q.735, and appendix I. Practically, those removed elements are not part of the endorsed European version.

The references section distinguishes specific and non-specific references. That matters for maintenance and conformance work because specific references lock to a given edition, while non-specific references follow the latest version.

What terms does SIST EN 300 356-9 V4.1.2:2004 define?

• Closed User Group (CUG) - A service that restricts access so that only members of the group can communicate within it.
• Integrated Services Digital Network (ISDN) - The network environment for which the service and signalling are specified.
• Signalling System No.7 (SS7) - The signalling system used to carry ISUP messages.
• ISDN User Part (ISUP) - The SS7 user part used for ISDN call and supplementary-service signalling.
• Stage 1 - The overall service description from the user’s point of view.
• Stage 2 - The functional capabilities and information flows needed to support the service.
• Stage 3 - The signalling system protocols and switching functions needed to implement the service.

Who uses SIST EN 300 356-9 V4.1.2:2004?

SIST EN 300 356-9 V4.1.2:2004 is used by European public telecommunications operators and by the engineers who implement ISDN and SS7 interconnection. It is also relevant to switch vendors, signalling specialists, and test teams that need to support CUG behavior on the international interface.

What changed in SIST EN 300 356-9 V4.1.2:2004 from the previous edition?

This version is the ETSI endorsement of ITU-T Recommendation Q.735, clause 1 (1993), with European modifications applied. The endorsement notice states these changes:

• Scope and References are inserted at the start of clause 1.
• Several references in Q.735 clause 1 are replaced by ETSI and ETSI-modified standards.
• Specific sub-items in subclauses 1.5.2.1.1 and 1.5.2.5.1 are deleted.
• Figures 1-2/Q.735 to 1-4/Q.735 are deleted.
• Appendix I is deleted.

Which standards are used with SIST EN 300 356-9 V4.1.2:2004?

Reference	What it contributes
ITU-T Recommendation I.130	Three-level service characterization used to separate stage 1, stage 2, and stage 3
ETSI ETS 300 121	ISUP for international ISDN interconnections, version 1 basis
ETSI ETS 300 136	CUG service description
ETSI ETS 300 137	CUG functional capabilities and information flows
ETSI EN 300 138-1	DSS1 protocol for the CUG supplementary service
ETSI EN 300 356-1	ISUP version 4 basic services
ETSI EN 300 356-2	ISDN supplementary service in ISUP version 4
ETSI EN 300 403-1	DSS1 signalling network layer for circuit-mode basic call control

The same multi-part deliverable also includes parts for basic services, individual supplementary services such as CLIP, CLIR, COLP, COLR, TP, UUS, SUB, MCID, CONF, ECT, Diversion, HOLD, CW, CCBS, 3PTY, CCNR, ACR, and conformance and test specifications for basic and supplementary services.

What does the SIST EN 300 356-9 V4.1.2:2004 document contain?

The document contains the endorsement notice, the inserted Scope and References sections, and the list of global modifications to ITU-T Recommendation Q.735 clause 1. It also contains the reference replacement table that maps Q.735 references to ETSI standards and ETSI-modified ITU-T recommendations.

It is a protocol-oriented document, so the useful material for implementation is the wording that aligns CUG support with the ISDN/ISUP reference set and the deletions that define what is not carried into this European version. For design and testing, the important point is the network behavior at the international interface, not a user-service brochure.

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Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User
Part (ISUP) version 4 for the international interface; Part 9: Closed User Group (CUG)
supplementary service [ITU-T Recommendation Q.735, clause 1 (1993) modified]
Ta slovenski standard je istoveten z: EN 300 356-9 Version 4.1.2
ICS:
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

European Standard (Telecommunications series)
Integrated Services Digital Network (ISDN);
Signalling System No.7 (SS7);
ISDN User Part (ISUP) version 4 for the international interface;
Part 9: Closed User Group (CUG) supplementary service
[ITU-T Recommendation Q.735, clause 1 (1993) modified]

2 ETSI EN 300 356-9 V4.1.2 (2001-07)
Reference
REN/SPAN-01082-09
Keywords
ISDN, ISUP, SS7, supplementary service, CUG,
endorsement
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ETSI
3 ETSI EN 300 356-9 V4.1.2 (2001-07)
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Foreword
This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Services and
Protocols for Advanced Networks (SPAN).
The present document is part 9 of a multi-part deliverable covering the ISDN User Part (ISUP) version 4 for the
international interface, as identified below:
Part 1: "Basic services [ITU-T Recommendations Q.761 to Q.764 (1999) modified]";
Part 2: "ISDN supplementary service [ITU-T Recommendation Q.730 (1999) modified]";
Part 3: "Calling Line Identification Presentation (CLIP) supplementary service [ITU-T Recommendation Q.731,
clause 3 (1993) modified]";
Part 4: "Calling Line Identification Restriction (CLIR) supplementary service [ITU-T Recommendation Q.731,
clause 4 (1993) modified]";
Part 5: "Connected Line Identification Presentation (COLP) supplementary service [ITU-T Recommendation
Q.731, clause 5 (1993) modified]";
Part 6: "Connected Line Identification Restriction (COLR) supplementary service [ITU-T Recommendation
Q.731, clause 6 (1993) modified]";
Part 7: "Terminal Portability (TP) supplementary service [ITU-T Recommendation Q.733, clause 4 (1993)
modified]";
Part 8: "User-to-User Signalling (UUS) supplementary service [ITU-T Recommendation Q.737, clause 1 (1997)
modified]";
Part 9: "Closed User Group (CUG) supplementary service [ITU-T Recommendation Q.735, clause 1 (1993)
modified]";
Part 10: "Subaddressing (SUB) supplementary service [ITU-T Recommendation Q.731, clause 8 (1992)
modified]";
Part 11: "Malicious Call Identification (MCID) supplementary service [ITU-T Recommendation Q.731,
clause 7 (1997) modified]";
Part 12: "Conference Call, add-on (CONF) supplementary service [ITU-T Recommendation Q.734,
clause 1 (1993) and implementors guide (1998) modified]";
Part 14: "Explicit Call Transfer (ECT) supplementary service [ITU-T Recommendation Q.732, clause 7 (1996)
and implementors guide (1998) modified]";
Part 15: "Diversion supplementary service [ITU-T Recommendation Q.732, clauses 2 to 5 (1999) modified]";
Part 16: "Call Hold (HOLD) supplementary service [ITU-T Recommendation Q.733, clause 2 (1993) modified]";
Part 17: "Call Waiting (CW) supplementary service [ITU-T Recommendation Q.733, clause 1 (1992) modified]";
ETSI
4 ETSI EN 300 356-9 V4.1.2 (2001-07)
Part 18: "Completion of Calls to Busy Subscriber (CCBS) supplementary service [ITU-T Recommendation
Q.733, clause 3 (1997) modified]";
Part 19: "Three-Party (3PTY) supplementary service [ITU-T Recommendation Q.734, clause 2 (1996) and
implementors guide (1998) modified]";
Part 20: "Completion of Calls on No Reply (CCNR) supplementary service [ITU-T Recommendation Q.733,
clause 5 (1999) modified]";
Part 21: "Anonymous Call Rejection (ACR) supplementary service [ITU-T Recommendation Q.731,
clause 4 (1993)]";
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 supplementary
services";
Part 35: "Test Suite Structure and Test Purposes (TSS&TP) specification for supplementary services";
Part 36: "Abstract Test Suite (ATS) and
...