SIST EN 301 991 V1.1.1:2005

SIST EN 301 991 V1.1.1:2005 is the Slovenian adoption of ETSI EN 301 991 V1.1.1, a European Standard for Private Integrated Services Network (PISN) inter-exchange signalling. It specifies the signalling protocol used at the Q reference point to support the Short Message Service (SMS) and endorses ISO/IEC 21990 (2002) with ETSI modifications. It is aimed at engineers, vendors, and testers who work on PISN signalling and related supplementary services.

What does SIST EN 301 991 V1.1.1:2005 specify?

SIST EN 301 991 V1.1.1:2005 is an endorsement of ISO/IEC 21990 rather than a separate protocol specification written from scratch. Its scope is the inter-exchange signalling protocol for SMS in PISN, using ISDN concepts and the OSI framework.

The document shows how the ISO/IEC text is adapted for ETSI use. The front matter and endorsement notice point to the protocol at the Q reference point, its role in PSS1, and its place in the QSIG environment.

What are the key requirements of SIST EN 301 991 V1.1.1:2005?

SIST EN 301 991 V1.1.1:2005 applies ISO/IEC 21990 with explicit ETSI modifications. In practice, implementers follow the ISO/IEC protocol content, but they must use the ETSI reference mapping and wording given in the endorsement notice.

• The protocol is defined for the Q reference point in support of SMS. This tells network designers where the signalling applies and where interoperability must be checked.
• The protocol forms part of PSS1, informally known as QSIG. That means it is meant to fit into the wider PISN signalling family rather than stand alone.
• Clause 3 replaces the generic references paragraph with ETSI rules for specific and non-specific references. This matters when a design or test depends on the exact edition of a referenced document.
• Clause 3 adds six ETSI normative references. These are the companion documents that provide the basic services, reference configuration, supplementary-service framework, name identification, Message Waiting Indication (MWI), and the SMS supplementary service model.
• Throughout ISO/IEC 21990, several ISO/IEC references are replaced by ETSI document numbers. This keeps the protocol aligned with ETSI publications used in PISN implementations.
• The wording “this International Standard” is replaced by “the present document”. This is an editorial and legal alignment that makes the ETSI version self-contained.
• The foreword and IPR notice direct users to ETSI’s IPR register. For product work, that means patent-related checks remain part of the implementation review.

What terms does SIST EN 301 991 V1.1.1:2005 define?

• Private Integrated Services Network (PISN) - the private network environment for which the signalling protocol is written.
• Short Message Service (SMS) - the supplementary service supported by the protocol.
• QSIG - the informal name used for the PSS1 protocol family in PISN inter-exchange signalling.
• Q reference point - the interface point where the signalling protocol is applied between exchanges.
• PSS1 protocol - the signalling protocol family that includes the SMS support defined here.
• Integrated Services Digital Network (ISDN) - the concept base the series uses for its service and signalling model.
• Open Systems Interconnection (OSI) - the framework the series follows for standard structure and terminology.
• IPR - Intellectual Property Rights, which ETSI flags because essential or potentially essential rights may exist.

Who uses SIST EN 301 991 V1.1.1:2005?

SIST EN 301 991 V1.1.1:2005 is used by telecommunications engineers, signalling protocol designers, equipment vendors, interoperability testers, and quality or procurement teams working with PISN products. They use it to specify, implement, verify, or compare SMS signalling at the Q reference point and to identify the ETSI companion documents that must be used alongside it.

What changed in SIST EN 301 991 V1.1.1:2005 from the previous edition?

The history shows an earlier publication as TS 101 991 V1.1.1 and later publication as the EN version. The stated changes in the EN are the endorsement edits: updated clause 3 text, added ETSI normative references, replacement of ISO/IEC reference numbers throughout the text, and replacement of “this International Standard” with “the present document”.

Which standards are used with SIST EN 301 991 V1.1.1:2005?

What does the SIST EN 301 991 V1.1.1:2005 document contain?

The document contains the ETSI foreword, the endorsement notice, the clause 3 replacement text, and the list of added normative references. It also includes the table that maps ISO/IEC references to ETSI references, the editorial change from “this International Standard” to “the present document”, the IPR notice, the national transposition dates, and the publication history.

In practical terms, it is a standards wrapper around ISO/IEC 21990 that tells readers how to use the ISO/IEC text in an ETSI PISN context.