SIST EN 301 907 V1.1.1:2005

SIST EN 301 907 V1.1.1:2005 is the Slovenian adoption of ETSI EN 301 907 V1.1.1, and it endorses ISO/IEC 21410 (2001) with ETSI modifications. It specifies signalling interworking for the call transfer supplementary service between QSIG and H.323. The standard is aimed at engineers, integrators, and testers working on Private Integrated Services Networks (PISN) and IP-based private telephony systems.

What does SIST EN 301 907 V1.1.1:2005 specify?

SIST EN 301 907 V1.1.1:2005 specifies how call transfer supplementary service signalling works between a PISN side using QSIG and a packet-based private telecommunications network side based on H.323. In practice, it is the reference for making the two signalling environments work together in a consistent way.

The document is organized as an endorsement of ISO/IEC 21410. Its main text is the endorsement notice, a replacement of clause 3, a set of modified normative references, and a short document history.

What are the key requirements of SIST EN 301 907 V1.1.1:2005?

SIST EN 301 907 V1.1.1:2005 applies the elements of ISO/IEC 21410 (2001) but changes them where ETSI states. For implementers, that means the ETSI version is the one to follow, especially for references and terminology.

Clause 3 and references

Clause 3 replaces the opening paragraph on references with ETSI wording that explains how specific and non-specific references are treated. For a specific reference, later revisions do not apply; for a non-specific reference, the latest version applies. This matters when selecting companion standards for design or conformance work.

The same clause adds six normative references at the end of the reference list:

• ETSI EN 300 172
• ETSI ETS 300 475-1
• ETSI EN 300 239
• ETSI EN 300 261
• ETSI EN 301 919
• ETSI TS 101 905

In practice, these documents supply the PISN basic services, reference configuration, supplementary service framework, call transfer rules, single step call transfer rules, and the generic functional protocol support needed for the interworking work.

Reference substitution across the document

SIST EN 301 907 V1.1.1:2005 replaces several ISO/IEC references in ISO/IEC 21410 with ETSI equivalents. This keeps the signalling model aligned with the ETSI PISN and CN document set. For users, the practical effect is that the standard points to the ETSI documents that define the surrounding protocol architecture.

Terminology update

SIST EN 301 907 V1.1.1:2005 replaces the phrase "this International Standard" with "the present document". That is a small wording change, but it makes the text consistent with ETSI standard language.

Scope of the technical model

SIST EN 301 907 V1.1.1:2005 assumes the PISN side uses QSIG and the IP-based side uses ITU-T Recommendation H.323. This matters because implementers need to map signalling behavior between those two protocol environments, not design a standalone transfer service.

What terms does SIST EN 301 907 V1.1.1:2005 define?

• PISN - Private Integrated Services Network, the network family covered by the standard series.
• QSIG - the Q reference point signalling used on the PISN side.
• H.323 - the ITU-T protocol family used here for the packet-based private telecommunications network side.
• ISDN - Integrated Services Digital Network, whose concepts underpin the series.
• OSI - Open Systems Interconnection, the framework mentioned for the standards structure.
• Call transfer supplementary service - the service covered by the standard, used to transfer an ongoing call.
• PTNXs - Private Telecommunication Network eXchanges, named in the referenced configuration standard.

Who uses SIST EN 301 907 V1.1.1:2005?

SIST EN 301 907 V1.1.1:2005 is used by telecom equipment vendors, PBX and IP telephony system designers, and network integrators who need QSIG-to-H.323 interworking. It is also relevant for interoperability test labs, quality teams, and buyers writing technical procurement requirements for corporate telecommunication networks. The standard helps these groups describe, implement, and verify call transfer behavior across mixed network environments.

What changed in SIST EN 301 907 V1.1.1:2005 from the previous edition?

SIST EN 301 907 V1.1.1:2005 endorses ISO/IEC 21410 (2001) and applies ETSI modifications. The endorsement notice states these changes:

• clause 3 is replaced with ETSI reference-language wording,
• six ETSI normative references are added,
• several ISO/IEC references are replaced by ETSI documents,
• the phrase "this International Standard" is replaced by "the present document".

Which standards are used with SIST EN 301 907 V1.1.1:2005?

These references form the support standards that the endorsement points users to when they implement or test the service.

What does the SIST EN 301 907 V1.1.1:2005 document contain?

The document contains the endorsement of ISO/IEC 21410, the modifications to clause 3, the added normative references, and the reference-mapping table that swaps ISO/IEC citations for ETSI ones. It also includes the foreword, IPR notice, transposition dates, copyright notice, and document history. In practical use, the most important part is the modified reference structure, because that tells users which ETSI documents govern the interworking model.