SIST EN 301 265 V1.2.1:2005

SIST EN 301 265 V1.2.1:2005 is the Slovenian adoption of ETSI EN 301 265 V1.2.1, which endorses ISO/IEC 15054 (2003) for the Call Interception Additional Network Feature (ANF) in a Private Integrated Services Network (PISN). It specifies the inter-exchange signalling protocol used at the Q reference point, so it is relevant to people who design, implement, or verify PISN signalling and QSIG-based interoperability.

What does SIST EN 301 265 V1.2.1:2005 specify?

SIST EN 301 265 V1.2.1:2005 specifies the signalling protocol for Call Interception ANF in a PISN. The document is an endorsement of ISO/IEC 15054 (2003) with ETSI modifications, so the practical use of the standard is to apply the ISO base specification together with the ETSI reference updates.

The front matter shows that the document belongs to the ETSI series for PISN signalling and that the protocol forms part of PSS1, informally known as QSIG. For readers, that means this standard is not a general telecom overview - it is the protocol reference for one specific network feature in a defined signalling environment.

What are the key requirements of SIST EN 301 265 V1.2.1:2005?

The main technical content is the endorsement notice, especially the changes applied to clause 3 of ISO/IEC 15054. In practice, implementers need to follow these modifications when using the protocol, because they control which companion standards are referenced and how the document is read.

• Clause 3 replaces the generic reference text with ETSI wording on how references are treated. Specific references stay fixed to the cited edition, while non-specific references use the latest version. This matters when you build or test against related standards.
• Clause 3 adds the ETSI normative references [15] to [24]. These cover circuit-mode basic services, circuit-mode 64 kbit/s bearer services, PTN reference configuration, and a set of supplementary-service protocols. This means the Call Interception ANF is not read in isolation.
• The document replaces ISO/IEC references throughout ISO/IEC 15054 with ETSI equivalents. For example, the circuit-mode, bearer-service, supplementary-service, and related PTN references are redirected to ETSI EN or ETS documents. This gives implementers the correct companion standards to use in an ETSI setting.
• The wording "this International Standard" is replaced by "the present document". That keeps the text aligned with the European Standard format and avoids ambiguity about which document is being cited.
• The foreword states that the protocol is used at the Q reference point in support of Call Interception ANF. For deployment, that tells network designers where the protocol sits in the system architecture and what feature it supports.

What terms does SIST EN 301 265 V1.2.1:2005 define?

• Private Integrated Services Network (PISN) - the network type for which the signalling protocol is intended.
• Additional Network Feature (ANF) - an added network function beyond basic call handling; here it is Call Interception.
• Q reference point - the interface where the inter-exchange signalling protocol is applied.
• PSS1 - the protocol family that includes the present document.
• QSIG - the informal name used for PSS1 in PISN signalling.
• Integrated Services Digital Network (ISDN) - the concepts used as the basis for the PISN standards series.
• Open Systems Interconnection (OSI) - the framework that the series follows for standardization structure.
• Intellectual Property Rights (IPRs) - patent-related declarations noted by ETSI for this document.

Who uses SIST EN 301 265 V1.2.1:2005?

This standard is used by vendors, integrators, and test teams working on PISN equipment and signalling. It is also relevant to telecommunications engineers and quality teams who need to verify that Call Interception ANF behavior matches the QSIG/PSS1 signalling model.

Because the document points to related bearer-service and supplementary-service standards, it is especially useful when several PISN features must interwork on the same exchange or network.

What changed in SIST EN 301 265 V1.2.1:2005 from the previous edition?

SIST EN 301 265 V1.2.1:2005 endorses ISO/IEC 15054 (2003) with ETSI modifications. The changes stated in the document are the replacement of selected ISO/IEC references with ETSI EN and ETS documents, the addition of ETSI normative references in clause 3, and the wording change from "this International Standard" to "the present document".

Which standards are used with SIST EN 301 265 V1.2.1:2005?

What does the SIST EN 301 265 V1.2.1:2005 document contain?

The document contains the foreword, the endorsement notice, the clause 3 reference amendments, and the document history. Clause 3 includes a table that maps ISO/IEC references to ETSI replacements, which is the main practical guide for using the standard alongside its related PISN documents.

The front matter also carries transposition dates, an IPR notice, and publication history. For a reader, that means the document is mainly an endorsed protocol reference with administrative and cross-reference information rather than a long standalone specification.