SIST EN 301 257 V1.1.1:2005

SIST EN 301 257 V1.1.1:2005 is the ETSI European Standard for the Recall supplementary service in Private Integrated Services Network (PISN). It specifies the stage 1 and stage 2 description of that service, including its functional model and information flows, for people who design, implement, or assess PISN services and signalling.

What does SIST EN 301 257 V1.1.1:2005 specify?

SIST EN 301 257 V1.1.1:2005 specifies the Recall supplementary service for PISN. In practice, that means it sets out how the service is described at the service level and at the functional-model and information-flow level, so implementers can work from the same service definition.

The standard is one of a series for services and signalling protocols in PISN. The foreword says the series uses Integrated Services Digital Network (ISDN) concepts and follows the Open Systems Interconnection (OSI) framework.

The document is organized around the adopted ISO/IEC 15051 text, with ETSI modifications. Clause 3 updates the normative references, and clause 6.3 adds two service interactions for cordless terminal cases.

What are the key requirements of SIST EN 301 257 V1.1.1:2005?

The main requirement of SIST EN 301 257 V1.1.1:2005 is the specification of the Recall supplementary service in stage 1 and stage 2 form. For users, that means the standard is the technical basis for describing the service consistently before equipment or network-specific implementation details are added.

Service description and model

The standard covers the Recall supplementary service as both a service description and a functional model with information flows. That matters because service designers need both the user-visible behavior and the exchange of information that supports it.

Stage-based treatment

The scope says the document contains stage 1 and stage 2 description, and refers to ENV 41 005 for the definition of stages. In practice, this tells readers that the standard is written for the early specification layers used in telecommunications service definition.

Cordless terminal cases

Clause 6.3.20 covers Cordless terminal location registration (SS-CTLR) and clause 6.3.21 covers Cordless terminal mobility incoming call (ANF-CTMI). Both are marked No interaction, which means these cordless terminal functions are treated as not affecting the Recall supplementary service interaction rules in the specified cases.

Reference alignment

Clause 3 replaces several older references with ETSI standards: EN 300 171, ETS 300 260, ETS 300 387, and ETS 300 475-1. This keeps the Recall supplementary service aligned with the rest of the PISN/PTN specification set used by implementers.

Editorial and terminology changes

Throughout the text, the document replaces references such as ISO/IEC 11574, ISO/IEC 11579-1, ISO/IEC 13865, and ITU-T Recommendation I.130 with the ETSI equivalents named in clause 3. It also replaces the term “International Standard” by “EN,” which reflects the European Standard status of the document.

What terms does SIST EN 301 257 V1.1.1:2005 define?

PISN - Private Integrated Services Network, the network context for the service specified by this standard.

Recall supplementary service - the PISN supplementary service covered by the document, described through stage 1 and stage 2 models.

ISDN - Integrated Services Digital Network, the concept set the series uses as its basis for service and protocol specification.

OSI - Open Systems Interconnection, the framework the foreword says the series conforms to.

SS-CTLR - Cordless terminal location registration, identified in clause 6.3.20 as a cordless terminal-related case with no interaction.

ANF-CTMI - Cordless terminal mobility incoming call, identified in clause 6.3.21 as another cordless terminal-related case with no interaction.

Who uses SIST EN 301 257 V1.1.1:2005?

SIST EN 301 257 V1.1.1:2005 is used by telecommunications engineers, service architects, and equipment manufacturers working on PISN. It is also relevant to standards specialists who need to align implementations with ETSI service definitions and signalling behavior.

Quality and interoperability teams can use it when checking whether a product’s service behavior matches the specified Recall supplementary service model. Buyers and technical specifiers can use it to confirm that a proposed solution is based on the same service framework as other PISN standards.

What changed in SIST EN 301 257 V1.1.1:2005 from the previous edition?

SIST EN 301 257 V1.1.1:2005 adopts ISO/IEC 15051 (1997) with agreed modifications. The stated changes are the added normative references in clause 3, the replacement of several references throughout the text, the replacement of “International Standard” by “EN,” and the insertion of clauses 6.3.20 and 6.3.21 for SS-CTLR and ANF-CTMI.

Which standards are used with SIST EN 301 257 V1.1.1:2005?

• ISO/IEC 15051 (1997) - the base international text adopted by this EN with modifications.
• ECMA DTR/ECMA-00002 (ECMA-TR/SVC) - gives a description of the supplementary service.
• ENV 41 005 - defines the stages used for the service description.
• EN 300 171 - provides control aspects of circuit-mode basic services.
• ETS 300 260 - covers the Call Transfer Supplementary Service.
• ETS 300 387 - gives the method for specifying basic and supplementary services.
• ETS 300 475-1 - provides the PTN reference configuration for PTNX.

What does the SIST EN 301 257 V1.1.1:2005 document contain?

The document contains the approved EN version of the Recall supplementary service specification, including the service text, functional model, and information flows. It also contains the ETSI modification markers used to show inserted, underlined, and struck-out text against the ISO/IEC base document.

Clause 3 presents the normative references used to anchor the specification to related PISN and PTN standards. Clause 6.3 adds the cordless terminal location registration and cordless terminal mobility incoming call subclauses, both marked as having no interaction.