SIST EN 301 257 V1.2.1:2005

• Abstract:

  Endorsement of the last ISO version.

• Status: Published
• Publication Date: 28-Feb-2005
• ICS: 33.040.35 - Telephone networks
• Technical Committee: SPN - Services and Protocols for Networks
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Mar-2005
• Due Date: 01-Mar-2005
• Completion Date: 01-Mar-2005
• Ref Project: ETSI EN 301 257 V1.2.1 (2004-01) - Private Integrated Services Network (PISN); Specification, functional models and information flows; Recall supplementary service [ISO/IEC 15051 (2003), modified]

SIST EN 301 257 V1.2.1:2005 is the Slovenian adoption of ETSI EN 301 257 V1.2.1, published by SIST. It specifies the Recall supplementary service for Private Integrated Services Network (PISN) and endorses ISO/IEC 15051 (2003) with ETSI modifications, so it is used by people who specify, implement, or test PISN services and signalling.

What does SIST EN 301 257 V1.2.1:2005 specify?

SIST EN 301 257 V1.2.1:2005 is an endorsement of the last ISO version of ISO/IEC 15051 for the Recall supplementary service in PISN. In practice, that means the ETSI text does not restate the whole international standard as a new service definition; it points to the ISO/IEC document and applies the ETSI-specific changes.

The foreword places the document in a series for PISN services and signalling protocols. It also says the series uses Integrated Services Digital Network (ISDN) concepts and conforms to the Open Systems Interconnection (OSI) framework, which matters for interoperability and for understanding the technical style of the service description.

The visible structure of the document is:

• foreword
• endorsement notice
• clause 3 modifications
• document history

What are the key requirements of SIST EN 301 257 V1.2.1:2005?

The standard applies ISO/IEC 15051 with listed ETSI modifications

SIST EN 301 257 V1.2.1:2005 states that the elements of ISO/IEC 15051 (2003) apply, except where ETSI changes them. For implementers, the practical point is simple: the ISO/IEC text remains the base, but the ETSI amendments control how it is used in this EN.

Clause 3 changes how references are handled

SIST EN 301 257 V1.2.1:2005 replaces the opening paragraph of clause 3 with text that distinguishes specific and non-specific references. A specific reference stays fixed to the cited edition, while a non-specific reference uses the latest version. That matters when you are checking which edition to design or test against.

Clause 3 adds three normative references

SIST EN 301 257 V1.2.1:2005 inserts EN 300 171, ETS 300 475-1, and EN 300 260 at the end of clause 3. These references bring in the circuit-mode 64 kbit/s bearer services, the PTN reference configuration for PTNXs, and the Call transfer supplementary service, so readers know which companion ETSI texts form part of the technical basis.

The standard replaces ISO/IEC references throughout the text

SIST EN 301 257 V1.2.1:2005 replaces ISO/IEC 11574 with EN 300 171, ISO/IEC 11579-1 with ETS 300 475-1, and ISO/IEC 13865 with EN 300 260 throughout the text. In practice, any cross-reference in the base ISO/IEC wording must be read against the ETSI document named in the replacement table.

The wording is aligned to the present document

SIST EN 301 257 V1.2.1:2005 replaces the phrase “this International Standard” with “the present document”. This is a small wording change, but it is important in endorsed standards because it shows readers when the ETSI text is speaking about its own modified version.

What terms does SIST EN 301 257 V1.2.1:2005 define?

• Private Integrated Services Network (PISN) - the private network environment for which the service and signalling model is written.
• Recall supplementary service - the supplementary service covered by the standard.
• Integrated Services Digital Network (ISDN) - the concept base used by the PISN standards series.
• Open Systems Interconnection (OSI) - the framework the series says it conforms to.
• Private Telecommunication Network (PTN) - the network type named in a referenced companion standard.
• Private Telecommunication Network eXchanges (PTNXs) - the exchange nodes covered by the PTN reference configuration.
• Intellectual Property Rights (IPRs) - rights that ETSI notes may be relevant to the document.

Who uses SIST EN 301 257 V1.2.1:2005?

SIST EN 301 257 V1.2.1:2005 is used by telecommunications engineers, standards developers, and equipment vendors working on PISN services and signalling. It is also relevant to test labs and quality teams that need to check conformance against the ETSI wording, especially the reference substitutions and the way the standard ties into companion ETSI documents.

What changed in SIST EN 301 257 V1.2.1:2005 from the previous edition?

The endorsement notice states these changes from ISO/IEC 15051 (2003):

• clause 3 is replaced with reference-handling text
• EN 300 171, ETS 300 475-1, and EN 300 260 are added as normative references
• ISO/IEC 11574, ISO/IEC 11579-1, and ISO/IEC 13865 are replaced by the ETSI references throughout the text
• “this International Standard” is replaced by “the present document”

The document history also records earlier publication V1.1.1 and the later V1.2.1 publication milestone.

Which standards are used with SIST EN 301 257 V1.2.1:2005?

Standard	What it contributes
ISO/IEC 15051 (2003)	The international base text that this EN endorses and modifies
EN 300 171	Circuit-mode 64 kbit/s bearer services
ETS 300 475-1	PTN reference configuration for PTNXs
EN 300 260	Call transfer supplementary service

What does the SIST EN 301 257 V1.2.1:2005 document contain?

SIST EN 301 257 V1.2.1:2005 contains the endorsement notice, the clause 3 replacement text, and the reference substitution table that maps ISO/IEC references to ETSI references. It also contains a document history block showing the publication sequence and approval timing.

For a reader, the useful part of the document is not a full restatement of the service model, but the ETSI-specific guidance on how the ISO/IEC text is to be read and cross-referenced.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Zasebno omrežje z integriranimi storitvami (PISN) - Specifikacija, funkcijski modeli in informacijski pretoki - Dopolnilna storitev: priklic [ISO/IEC 15051 (2003), spremenjen]Private Integrated Services Network (PISN); Specification, functional models and information flows; Recall supplementary service [ISO/IEC 15051 (2003), modified]33.040.35Telefonska omrežjaTelephone networksICS:Ta slovenski standard je istoveten z:EN 301 257 Version 1.2.1SIST EN 301 257 V1.2.1:2005en01-marec-2005SIST EN 301 257 V1.2.1:2005SLOVENSKI
STANDARD
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Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http://webapp.etsi.org/IPR
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