SIST EN 301 918 V1.1.1:2005

SIST EN 301 918 V1.1.1:2005 is the Slovenian adoption of ETSI EN 301 918 V1.1.1 for Private Integrated Services Network (PISN). Published by SIST, it specifies the Single Step Call Transfer supplementary service, which lets user A turn an existing call between user A and user B into a new call between user B and user C. The document is for people designing, implementing, testing, or buying PISN signalling and service support.

What does SIST EN 301 918 V1.1.1:2005 specify?

SIST EN 301 918 V1.1.1:2005 specifies the Single Step Call Transfer supplementary service for PISN. In practical terms, it defines a transfer where user A is no longer connected to the final call, and user C was not already on a call with user A before the transfer.

The document places that service in the wider PISN standards family. The foreword says the series uses Integrated Services Digital Network (ISDN) concepts and follows the Open Systems Interconnection (OSI) framework, so the service is written to fit a larger telecommunications architecture.

The document is organized as an ETSI European Standard that endorses ISO/IEC 19459 (2001) with modifications. Clause 3 is the key modification area in the provided text, where reference handling is defined and extra normative references are added.

What are the key requirements of SIST EN 301 918 V1.1.1:2005?

SIST EN 301 918 V1.1.1:2005 is mainly a service specification and an endorsement notice with targeted modifications. The most important points are the service definition, the reference rules, and the added dependencies on related PISN standards.

• The service definition states that Single Step Call Transfer converts an existing A-B call into a B-C call. For an implementer, this is the core behavior the network must support.
• The foreword states that the document belongs to a series defining services and signalling protocols for PISN. This matters because interoperability depends on matching the surrounding PISN framework, not only the transfer feature itself.
• The foreword also says the series uses ISDN concepts and conforms to the OSI framework. In practice, this tells designers which broader telecommunication model the service fits into.
• The endorsement notice says ISO/IEC 19459 (2001) applies with modifications. Users should therefore follow the ETSI-adapted version named here, not the ISO/IEC text alone.
• Clause 3 introduces specific and non-specific reference handling. Specific references are fixed to the cited edition, while non-specific references point to the latest version, which affects version control in compliance work.
• Clause 3 adds normative references [12] to [18]. These cover addressing, circuit-mode 64 kbit/s bearer services, reference configuration for PTNXs, name identification supplementary services, call transfer supplementary service, inter-exchange signalling protocol for call transfer, and identification supplementary services. These related documents supply the surrounding signaling and service definitions needed for implementation.
• Clause 3 replaces several ISO/IEC references with ETSI references throughout the text. That keeps the document aligned with ETSI PISN standards and their modified counterparts.

What terms does SIST EN 301 918 V1.1.1:2005 define?

• PISN - Private Integrated Services Network, the network family covered by the standard.
• Single Step Call Transfer - a supplementary service that moves an active call from A-B to B-C in one step.
• supplementary service - an added service that works alongside the basic call service.
• ISDN - Integrated Services Digital Network, the concept basis used for the PISN series.
• OSI - Open Systems Interconnection, the framework the series conforms to.
• IPRs - Intellectual Property Rights; ETSI notes that essential or potentially essential IPRs may have been declared.
• specific reference - a reference tied to a stated publication, edition, or version.
• non-specific reference - a reference that resolves to the latest version.

Who uses SIST EN 301 918 V1.1.1:2005?

SIST EN 301 918 V1.1.1:2005 is used by telecom engineers, signalling protocol developers, equipment vendors, and interoperability test teams working with PISN. It is also useful for quality managers and buyers who need to confirm that a product supports the Single Step Call Transfer supplementary service.

The keywords in the document, including PINX, PISN, QSIG, stage 1, and stage 2, point to use in private telecommunications environments where service behavior and signalling compatibility matter. That makes the document relevant for specification, implementation, and conformance discussions.

What changed in SIST EN 301 918 V1.1.1:2005 from ISO/IEC 19459 (2001)?

SIST EN 301 918 V1.1.1:2005 endorses ISO/IEC 19459 (2001) with ETSI modifications. The changes stated in the document are the added normative references in clause 3, the replacement of several ISO/IEC references with ETSI references, and the wording change from “this International Standard” to “the present document”.

Which standards are used with SIST EN 301 918 V1.1.1:2005?

• ETSI EN 300 189 - provides PISN addressing.
• ETSI EN 300 171 - covers circuit-mode 64 kbit/s bearer services.
• ETSI ETS 300 475-1 - gives the reference configuration for PTNXs.
• ETSI EN 300 237 - covers name identification supplementary services.
• ETSI ETS 300 260 - covers the call transfer supplementary service.
• ETSI ETS 300 261 - covers the inter-exchange signalling protocol for call transfer.
• ETSI ETS 300 173 - covers identification supplementary services.

What does the SIST EN 301 918 V1.1.1:2005 document contain?

The document contains the front matter, the ETSI IPR notice, the foreword, the endorsement notice, clause 3 modifications, and a document history section. The foreword explains the standard’s place in the PISN series, while the endorsement notice shows how ISO/IEC 19459 is adapted for ETSI use.

Clause 3 contains the key technical editorial changes, including a table of reference substitutions and the added normative references. The history section records the approval and publication path of the standard.