SIST EN 300 356-12 V4.2.1:2004

• 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 300 356-12 V4.2.1 (2001-07) - Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 12: Conference call, add-on (CONF) supplementary service [ITU-T Recommendation Q.734, clause 1 (1993) and implementors guide (1998) modified]

SIST EN 300 356-12 V4.2.1:2004 is the Slovenian adoption of ETSI EN 300 356-12 V4.2.1 for Integrated Services Digital Network (ISDN) signalling over Signalling System No.7 (SS7). It specifies the stage 3 protocol procedures and switching functions for the Conference call, add-on (CONF) supplementary service on the ISDN User Part (ISUP) international interface. The document is aimed at telecom operators, network and switch engineers, and implementers who need the signalling rules for CONF.

What does SIST EN 300 356-12 V4.2.1:2004 specify?

SIST EN 300 356-12 V4.2.1:2004 specifies the stage 3 aspects of the CONF supplementary service for pan-European ISDN using ISUP. In practice, that means the signalling procedures and switch behaviour needed to support a conference call with more than two parties.

The document is written as an ETSI endorsement of ITU-T Recommendation Q.734, clause 1, as modified by the implementors guide. It applies to the international interface and keeps the message, code, and procedure details needed at originating and destination exchanges.

It is organized around the endorsed clause 1 text, with inserted Scope and References text, targeted subclause edits, reference replacements, and an informative annex.

Annex	What it covers
Annex ZA	Coding of the compatibility information

What are the key requirements of SIST EN 300 356-12 V4.2.1:2004?

The most important requirements are in the Scope and in the clause 1 modifications that ETSI applies to Q.734. They tell implementers what the service is, where it applies, and which parts of the earlier text remain valid.

• Clause 1, Scope - SIST EN 300 356-12 V4.2.1:2004 defines the CONF supplementary service as a multi-connection call with simultaneous communication between more than two parties. For implementers, this means the signalling must establish and manage more than one connection for a single call.
• Clause 1, Scope - The document covers stage 3 only: protocol procedures and switching functions. Stage 1 service description and stage 2 functional capabilities are handled in ETS 300 183 and ETS 300 184, so readers need those companion documents for user-service intent and information flows.
• Clause 1, Scope - The specification is for the pan-European ISDN international interface, and it explicitly keeps message formats, codes, and exchange actions that are relevant to that interface. In practice, this supports interoperability at international gateways.
• Clause 1, Scope - The document excludes extra protocol requirements for service delivery over a non-ISDN telecommunications network and for the national signalling interface. That matters because national access behaviour may need separate handling outside this standard.
• Clause 1, Scope - Formats, codes, and procedures marked for national use are included for informative purposes, and if they are supported in a national network and operator network, they should be supported that way. This helps align national and international behaviour without forcing a single national implementation model.
• Subclause 1.5 - The added note says the global call reference associated with calls on the multi-party legs is for further study. Engineers should treat that point as open for future clarification rather than a settled rule.
• Subclauses 1.5.2.1.1.9 and 1.5.2.1.1.10; Figures 1-9 and 1-10 - These are removed or redirected. That tells implementers not to rely on those specific paths or drawings when following the endorsed version.
• Annex ZA - Annex ZA recommends how to code compatibility information for the generic notification parameter. This is the place to consult when implementing message coding for interoperability checks.

What terms does SIST EN 300 356-12 V4.2.1:2004 define?

• Integrated Services Digital Network (ISDN) - The telecommunications network type used as the service environment for this standard.
• Signalling System No.7 (SS7) - The signalling system family used to carry the call-control information.
• ISDN User Part (ISUP) - The SS7 protocol part that handles ISDN call signalling on the international interface.
• Conference call, add-on (CONF) - The supplementary service that allows a user to create a call with more than two active parties.
• Digital Subscriber Signalling System No. one (DSS1) - The access-side signalling system named in the references and companion documents for related ISDN operation.
• Stage 3 - The level that defines protocol procedures and switching functions, rather than the service description or functional capabilities.

Who uses SIST EN 300 356-12 V4.2.1:2004?

SIST EN 300 356-12 V4.2.1:2004 is used by ISDN and SS7 engineers who implement or maintain conference-call signalling in switches, gateways, and operator networks. It is also relevant to telecom operators managing international ISDN interconnection, because the standard focuses on the international interface.

Test and conformance teams use it together with the related PICS, TSS&TP, ATS, and PIXIT parts of the EN 300 356 series. Standards teams and system integrators use it when they need the stage 3 signalling rules that match the stage 1 and stage 2 service documents.

What changed in SIST EN 300 356-12 V4.2.1:2004 from the previous edition?

Compared with the ITU-T clause it endorses, the ETSI version adds a Scope and a References section at the start of clause 1, replaces a set of cross-references with ETSI-controlled references, adds a note to subclause 1.5, removes subclauses 1.5.2.1.1.9 and 1.5.2.1.1.10, and deletes Figures 1-9/Q.734 and 1-10/Q.734. It also adds Annex ZA on compatibility information coding.

Which standards are used with SIST EN 300 356-12 V4.2.1:2004?

Reference	What it contributes
ITU-T Recommendation I.130	The service characterization model that underpins the stage 1, stage 2, stage 3 structure.
ETS 300 183	Stage 1 service description for CONF.
ETS 300 184	Stage 2 functional capabilities and information flows for CONF.
ETS 300 121	International ISUP application reference used in the modified text.
EN 300 356-1	Basic services part of ISUP version 4, used for modified references.
EN 300 356-2	ISDN supplementary service part of ISUP version 4, used for modified references.
EN 300 185-1	DSS1 protocol for CONF, used in the modified references.
EN 300 403-1	DSS1 network layer for circuit-mode basic call control, used in the modified references.

The foreword also places this part within the wider EN 300 356 series, which includes parts for basic services, other supplementary services, and conformance-testing specifications.

What does the SIST EN 300 356-12 V4.2.1:2004 document contain?

The document contains the endorsed clause 1 text from ITU-T Recommendation Q.734, plus ETSI modifications that adapt it for the European ISDN/SS7 context. It also contains a table of reference replacements so that the clause points to ETSI companion standards instead of the original ITU-T or CCITT references.

Annex ZA provides coding guidance for compatibility information related to the generic notification parameter. The body also records specific deletions and a note on global call reference handling, which are useful for implementation and interoperability work.

The front matter gives the series context, the publication history, and the national transposition dates.

SLOVENSKI STANDARD
01-april-2004
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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 12: Conference call, add-on
(CONF) supplementary service [ITU-T Recommendation Q.734, clause 1 (1993) and
implementors guide (1998) modified]
Ta slovenski standard je istoveten z: EN 300 356-12 Version 4.2.1
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 12: Conference call, add-on (CONF)
supplementary service
[ITU-T Recommendation Q.734, clause 1 (1993) and implementors guide (1998) modified]

2 ETSI EN 300 356-12 V4.2.1 (2001-07)
Reference
REN/SPAN-01082-12
Keywords
ISDN, ISUP, SS7, supplementary service, CONF,
endorsement
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ETSI
3 ETSI EN 300 356-12 V4.2.1 (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 12 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 300 356-12 V4.2.1 (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 partial Protocol Implementation eXtra Information for Testing (PIXIT)
proforma specification for supplementary services".
In accordance with ITU-T Recommendation I.130 [1], the following three level structure is used to describe the
supplementary telecommunication services as provided by European public telecommunications operators under the
pan-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 suppo
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