SIST EN 301 258 V1.2.1:2005

SIST EN 301 258 V1.2.1:2005 is the Slovenian adoption of ETSI EN 301 258 V1.2.1, endorsed by SIST. It specifies the inter-exchange signalling protocol for the Recall supplementary service in a Private Integrated Services Network (PISN), at the Q reference point, as part of the PSS1 protocol informally known as QSIG. In practice, it is the standard used when PISN equipment needs to support Recall in a way that can interoperate across exchanges.

What does SIST EN 301 258 V1.2.1:2005 specify?

SIST EN 301 258 V1.2.1:2005 is an endorsement of ISO/IEC 15052 (2003) with ETSI modifications. It keeps the original protocol subject matter, but adapts the document to ETSI reference practice and terminology.

The document is organized as an endorsement notice rather than a full re-write of the protocol. Clause 3 sets the rules for referenced documents and lists the ETSI standards that replace or supplement the ISO/IEC references used in the base text. The front matter also identifies the standard as part of the telecommunications series and records the transposition dates and publication history.

What are the key requirements of SIST EN 301 258 V1.2.1:2005?

SIST EN 301 258 V1.2.1:2005 mainly requires readers to apply ISO/IEC 15052 with the ETSI replacements stated in the endorsement notice. The practical effect is that implementers follow the same Recall signalling model, but against ETSI documents and ETSI wording.

• Clause 3 changes the reference policy. It states that specific references are fixed to the cited edition, while non-specific references use the latest version. This matters because it tells implementers whether a later revision changes the applicable baseline.
• Clause 3 adds ETSI normative references [16] to [25]. These include circuit-mode basic services, 64 kbit/s bearer services, PTN reference configuration, a generic supplementary-services protocol, and the signalling or functional-model standards for Call transfer, Name identification, Call diversion, Recall, and Call interception ANF. This anchors Recall in the wider PISN signalling family.
• Clause 3 replaces ISO/IEC references throughout the text. ISO/IEC 11572, 11574, 11579-1, 11582, 13865, 13868, 13869, 13873, 15051, and 15054 are replaced by the corresponding ETSI documents. In practice, this tells the reader exactly which ETSI standards to consult during design and verification.
• Clause 3 replaces “this International Standard” with “the present document”. This is a wording change, but it keeps the ETSI document self-referential and consistent with European Standard drafting.
• The foreword fixes the technical context. The standard applies to signalling at the Q reference point in a PISN and forms part of the PSS1 protocol, informally known as QSIG. That tells system designers where in the network the protocol sits.
• The foreword links the series to ISDN and OSI concepts. This matters for readers because the protocol family follows the service and signalling concepts used in those frameworks.

What terms does SIST EN 301 258 V1.2.1:2005 define?

The document uses several core terms from the PISN signalling family.

• Private Integrated Services Network (PISN) - a private network environment for integrated services and inter-exchange signalling.
• Integrated Services Digital Network (ISDN) - the concept base used by the series for services and signalling.
• Open Systems Interconnection (OSI) - the framework the series says it conforms to.
• Q reference point - the interface point where this signalling protocol applies.
• Recall supplementary service - the service supported by the protocol described in this standard.
• PSS1 - the protocol family that includes this document; the foreword says it is informally known as QSIG.
• QSIG - the informal name used for the PSS1 protocol family.
• Additional Network Feature (ANF) - a related network feature named in the normative references.

Who uses SIST EN 301 258 V1.2.1:2005?

SIST EN 301 258 V1.2.1:2005 is used by telecom equipment manufacturers, PISN and signalling implementers, test laboratories, and network integrators working on inter-exchange signalling. It is also relevant to quality teams and buyers who need Recall support to align with a specific PISN signalling standard.

What changed in SIST EN 301 258 V1.2.1:2005 from the previous edition?

The document history shows V1.2.1 following V1.1.1, with publication in January 2004 after a one-step approval procedure in 2003. The endorsed text also records ETSI-specific changes in clause 3, especially the replacement of ISO/IEC references with ETSI references and the updated wording used throughout the document.

Which standards are used with SIST EN 301 258 V1.2.1:2005?

What does the SIST EN 301 258 V1.2.1:2005 document contain?

The document contains the endorsement notice for ISO/IEC 15052 (2003), the ETSI foreword, and clause 3 changes that redirect references to ETSI standards. It also includes national transposition dates, an IPR notice, and the publication history. The main technical content is the reference-replacement table and the wording changes that align the ISO/IEC text with ETSI practice.