SIST EN 301 920 V1.1.1:2005

SIST EN 301 920 V1.1.1:2005 is the Slovenian adoption of ETSI EN 301 920 V1.1.1, produced by ECMA on behalf of ETSI. It specifies the Simple Dialog supplementary service for Private Integrated Services Network (PISN), defining how a user can exchange keypad and display information transparently with another user or an application. The standard is intended for people who design, implement, test, or specify PISN supplementary services and their signalling behavior.

What does SIST EN 301 920 V1.1.1:2005 specify?

SIST EN 301 920 V1.1.1:2005 specifies the Simple Dialog supplementary service for PISN. In practice, that means the service definition focuses on interactive exchange of keypad and display information over a private integrated network, rather than on voice transport.

The document is an ETSI endorsement of ISO/IEC 21407 (2001) with modifications. Its published structure is centered on the foreword, the endorsement notice, clause 3 on normative references, and the publication history.

What are the key requirements of SIST EN 301 920 V1.1.1:2005?

SIST EN 301 920 V1.1.1:2005 mainly standardizes how the ETSI version of the Simple Dialog specification is referenced and updated. The service itself is defined as a PISN supplementary service, so implementers use the document to align signalling, service description, and interoperability terminology.

Service scope in the PISN framework

The Simple Dialog supplementary service supports transparent exchange of keypad and display information between a user and another user or an application. For readers, the practical point is that the service is about interactive user dialog over the network, so equipment and software must preserve that dialog flow.

The foreword places the document in a series of standards for services and signalling protocols applicable to Private Integrated Services Networks (PISN). It also states that the series uses Integrated Services Digital Network (ISDN) concepts and follows the Open Systems Interconnection (OSI) framework, which tells implementers what technical environment the service belongs to.

How normative references are handled

Clause 3 states that documents cited with provisions become part of the present document. It also distinguishes specific references, which stay fixed to the cited edition, from non-specific references, which follow the latest version. That distinction matters when checking conformance, because it tells a designer or tester whether an update changes the applicable text.

ETSI references added to the text

Clause 3 adds ETSI EN 300 171 for circuit-mode 64 kbit/s bearer services and ETSI ETS 300 475-1 for PTN reference configuration, Part 1: PTNXs. These additions connect the Simple Dialog service text to the bearer-service and network-configuration references used in the ETSI PISN framework.

Reference substitutions inside ISO/IEC 21407

Throughout the endorsed text, ISO/IEC 11574 is replaced by EN 300 171 and ISO/IEC 11579-1 is replaced by ETS 300 475-1. The wording “this International Standard” is also replaced by “the present document”. For users, that means the ETSI version is the governing wording to follow when applying the service definition.

What terms does SIST EN 301 920 V1.1.1:2005 define?

SIST EN 301 920 V1.1.1:2005 uses a small set of recurring technical terms that frame the service.

• Private Integrated Services Network (PISN) - A private network environment for integrated services, used here as the setting for the Simple Dialog supplementary service.
• Simple Dialog supplementary service - A PISN service that lets a user exchange keypad and display information transparently with another user or an application.
• Integrated Services Digital Network (ISDN) - The concept base named in the foreword for the PISN standards series.
• Open Systems Interconnection (OSI) - The reference framework named in the foreword as the standards model used by the series.
• Private Telecommunication Network (PTN) - The network family named in the referenced ETSI material for which configuration is described.
• PTN eXchanges (PTNXs) - The exchange type named in ETS 300 475-1 for PTN reference configuration.
• Intellectual Property Rights (IPRs) - Patent-related rights mentioned in the front matter as potentially relevant to the document.

Who uses SIST EN 301 920 V1.1.1:2005?

SIST EN 301 920 V1.1.1:2005 is used by people working with PISN services and signalling protocols. That includes telecom equipment vendors, network designers, interoperability testers, and organizations specifying supplementary services for private networks.

It is also relevant to quality managers and buyers who need a formal service definition for procurement, implementation checks, or conformance review. The document tells them which ETSI references and terminology belong to the Simple Dialog service.

What changed in SIST EN 301 920 V1.1.1:2005 from the previous edition?

SIST EN 301 920 V1.1.1:2005 endorses ISO/IEC 21407 (2001) with ETSI modifications. The stated changes are the revised clause 3 on normative references, the addition of EN 300 171 and ETS 300 475-1, the replacement of ISO/IEC 11574 and ISO/IEC 11579-1 with those ETSI references, and the wording change from “this International Standard” to “the present document”.

Which standards are used with SIST EN 301 920 V1.1.1:2005?

SIST EN 301 920 V1.1.1:2005 is built on ISO/IEC 21407 (2001), which provides the original Simple Dialog text. It also uses ETSI EN 300 171 for circuit-mode 64 kbit/s bearer services and ETSI ETS 300 475-1 for PTN reference configuration, Part 1: PTNXs.

The document maps ISO/IEC 11574 to EN 300 171 and ISO/IEC 11579-1 to ETS 300 475-1. That mapping matters because it shows which ETSI documents replace the international references in the endorsed version.

What does the SIST EN 301 920 V1.1.1:2005 document contain?

SIST EN 301 920 V1.1.1:2005 contains front matter on copyright, IPR notices, and transposition dates, followed by a foreword that places the document in the PISN standards series. It then gives the endorsement notice for ISO/IEC 21407 and the specific ETSI modifications.

The document also contains clause 3 with the normative-reference rules and the inserted ETSI references, including the replacement table for cited standards. A history note records the publication status. This content supports implementation, review, and reference control more than it supports product testing procedures or worked examples.