SIST EN 301 254 V1.2.1:2005

SIST EN 301 254 V1.2.1:2005 is the Slovenian adoption of ETSI EN 301 254 V1.2.1, a European telecommunications standard for Private Integrated Services Network (PISN) Advice of Charge supplementary services. It specifies the service model and information flows used for PISN charging advice, so it is aimed at engineers, service specifiers, implementers, and testers working on private telephony networks.

What does SIST EN 301 254 V1.2.1:2005 specify?

SIST EN 301 254 V1.2.1:2005 endorses ISO/IEC 15049 (1997) with ETSI modifications. The document belongs to the PISN standards series, which uses Integrated Services Digital Network (ISDN) concepts and follows the Open Systems Interconnection (OSI) framework.

The endorsement notice shows how the standard is organized at document level:

• the foreword explains the series and the relationship to ISO/IEC 15049
• clause 3 is replaced with updated reference-handling text
• clause 3 also adds five normative references
• the history records the publication path of the ETSI version

In practice, the standard is a controlled adaptation of the ISO/IEC work for ETSI and SIST users who need the PISN Advice of Charge specification in the European telecommunications framework.

What are the key requirements of SIST EN 301 254 V1.2.1:2005?

SIST EN 301 254 V1.2.1:2005 specifies the Advice of Charge supplementary services for PISN. For implementers, that means the document is about how a private network presents charging advice as a service, not about general telephony features.

Clause 3 introduces a rule for references:

• specific references are fixed to the cited edition
• non-specific references always take the latest version

That matters when a product or conformance review depends on exactly which related document applies.

The endorsement notice adds five normative references in clause 3:

• EN 300 171 for circuit-mode 64 kbit/s bearer services
• ETS 300 475-1 for PTN reference configuration
• ETS 300 260 for call transfer supplementary service
• ETS 300 256 for diversion supplementary services
• ETS 300 387 for the method for specifying basic and supplementary services

These references tell the reader which companion documents must be used when implementing or interpreting the PISN service model.

The text also replaces several ISO/IEC references throughout the original document:

• ISO/IEC 11574 becomes EN 300 171
• ISO/IEC 11579-1 becomes ETS 300 475-1
• ISO/IEC 13865 becomes ETS 300 260
• ISO/IEC 13872 becomes ETS 300 256
• ITU-T Recommendation I.130 becomes ETS 300 387

This keeps the service model aligned with the ETSI reference set used by the European version.

Finally, the phrase “this International Standard” is replaced by “the present document”. That is a wording change, but it also signals that the endorsed ETSI text is the governing reference for users of this edition.

What terms does SIST EN 301 254 V1.2.1:2005 define?

PISN means Private Integrated Services Network, the network type covered by the standard series.

Advice of Charge (AOC) is the supplementary service family that provides charging advice to the user or network function.

ISDN means Integrated Services Digital Network, the concept base that the PISN series uses.

OSI means Open Systems Interconnection, the framework the series conforms to.

PTN means Private Telecommunication Network, a related network model used in the normative references.

Bearer service refers to the underlying transport service, here linked to circuit-mode 64 kbit/s bearer services.

Who uses SIST EN 301 254 V1.2.1:2005?

Telecommunications standards engineers use this standard when defining PISN service behavior and information flows.

Equipment manufacturers and system integrators use it when building private network switches, service platforms, or related control functions that need Advice of Charge support.

Test and verification teams use it when checking whether an implementation follows the PISN service model and the required companion references.

Procurement and quality teams use it to identify the exact service description and the related documents that must be considered for a product or project.

What changed in SIST EN 301 254 V1.2.1:2005 from the previous edition?

The Slovenian standard is identical to EN 301 254 Version 1.2.1. Its history shows an earlier V1.1.1 publication in October 1998, followed by the V1.2.1 publication path in 2003.

Which standards are used with SIST EN 301 254 V1.2.1:2005?

Clause 3 names these normative references:

• EN 300 171 - provides the circuit-mode 64 kbit/s bearer service basis
• ETS 300 475-1 - gives the PTN reference configuration for PTNXs
• ETS 300 260 - covers call transfer supplementary service
• ETS 300 256 - covers diversion supplementary services
• ETS 300 387 - gives the method for specifying basic and supplementary services

These documents supply the related service and configuration rules that the PISN Advice of Charge specification relies on.

What does the SIST EN 301 254 V1.2.1:2005 document contain?

The document contains the ETSI foreword, copyright and IPR notices, and the endorsement notice for ISO/IEC 15049. It includes the clause 3 replacement text, the added normative references, and the table that maps ISO/IEC references to ETSI references.

It also records the national transposition dates and the document history. For readers, that means the page is not just a service description - it also shows how the ETSI version was adopted and what reference set it uses.