SIST EN 301 048 V1.1.1:2005

SIST EN 301 048 V1.1.1:2005 is the Slovenian adoption of ETSI EN 301 048 V1.1.1, a European Telecommunications Standard for inter-exchange signalling in Private Integrated Services Network (PISN). It specifies the QSIG signalling protocol at the Q reference point to support the Transit counter additional network feature (ANF-TC) between Private Integrated services Network eXchanges (PINXs), based on ISO/IEC 15056 (1997) with agreed modifications.

What does SIST EN 301 048 V1.1.1:2005 specify?

SIST EN 301 048 V1.1.1:2005 specifies the signalling protocol used when PINXs communicate across the Q reference point in a PISN. Its practical purpose is to support ANF-TC, so implementers can exchange the information needed for the transit counter feature in a consistent way.

The document is an endorsement of ISO/IEC 15056 with ETSI-approved changes. In practice, that means readers need to follow the base international protocol text together with the ETSI reference substitutions and editorial changes listed in the endorsement notice.

What are the key requirements of SIST EN 301 048 V1.1.1:2005?

SIST EN 301 048 V1.1.1:2005 is mainly a protocol endorsement plus a set of reference updates, so the most important obligations are about using the correct companion standards and the correct document family.

Key points that matter in practice

• The foreword places the standard in the PISN series and says it uses ISDN concepts and the OSI framework. For engineers, this tells them the protocol belongs to the PISN/QSIG environment, not a general-purpose telecom protocol.
• The foreword identifies QSIG as the Q interface signalling protocol and says it is known as PSS1 in International Standards. That matters when mapping terminology across different ETSI and international documents.
• Clause 3 adds normative references [13] to [22]. These cover basic services, supplementary services, path replacement, call transfer, call completion, reference configuration, and the Transit counter additional network feature itself, so ANF-TC is implemented alongside the related PISN building blocks.
• The endorsement notice replaces specific international references throughout ISO/IEC 15056 with ETS counterparts. This keeps the approved EN text aligned with the ETSI PISN document set and avoids mixing reference families in implementation or testing.
• The endorsement notice also replaces the phrase “International Standard” with “EN” throughout ISO/IEC 15056. That is an editorial but important cue for readers working from the ETS version of the protocol.
• Modified or new text is marked with sidebars, and underlining and strike-out are used where needed. Reviewers and implementers can use these markings to see exactly what changed in the endorsed version.
• The document history records the approval and publication sequence. That helps quality teams confirm they are working from the right version when auditing documentation or test plans.

What terms does SIST EN 301 048 V1.1.1:2005 define?

• PISN - Private Integrated Services Network, the private network context for the signalling protocol.
• PINX - Private Integrated services Network eXchange, the exchange connected to other PINXs at the Q reference point.
• Q reference point - the interface point between PINXs used for inter-exchange signalling in a PISN.
• QSIG - the Q interface signalling protocol used for signalling between PINXs.
• PSS1 - Private integrated Signalling System No. 1, the international name used for QSIG.
• ANF-TC - Transit counter additional network feature, the feature supported by this standard.
• ISDN - Integrated Services Digital Network, the concept base referenced by the foreword for the PISN series.

Who uses SIST EN 301 048 V1.1.1:2005?

SIST EN 301 048 V1.1.1:2005 is used by telecom engineers, system integrators, and equipment manufacturers who implement PISN signalling between PINXs. It is also relevant to quality managers, test laboratories, and procurement teams that need to verify interoperability for ANF-TC support.

In practice, these readers use it to design QSIG signalling behaviour, check reference mappings to companion PISN standards, and validate that a product follows the approved EN version of the protocol.

Which standards are used with SIST EN 301 048 V1.1.1:2005?

What does the SIST EN 301 048 V1.1.1:2005 document contain?

SIST EN 301 048 V1.1.1:2005 contains the ETSI foreword, the endorsement notice for ISO/IEC 15056, and the clause 3 additions that introduce the related PISN references. It also includes a table mapping selected ISO/IEC and ITU-T references to their ETS equivalents throughout the text.

The document shows modified passages with sidebars, and it uses underlining and strike-out where detailed changes need to be highlighted. A short history block records the approval procedure and publication details.