SIST EN 301 923 V1.1.1:2005

• Abstract:

  ANF-CIDL is an additional network feature which allows the assignment of a Global Call Identification (GID) to identify a call end-to-end over the call route (i.e. between the two end PINXs). As an option, a Thread Identification may be assigned to different calls which are logically linked together due to the operation of other supplementary services and/or ANFs. Additionally a Leg Identification may be assigned, to identify the different legs of a call. This ANF has been developed to support the use of CSTA (ECMA-269) in a networked environment, i.e. in a PISN. Use of this ANF for other applications is not precluded.

• 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 301 923 V1.1.1 (2004-01) - Private Integrated Services Network (PISN); Inter-exchange signalling protocol; Call identification and call linkage Additional Network Feature (ANF) [ISO/IEC 21889 (2001), modified]

Overview

SIST EN 301 923 V1.1.1:2005 is a Slovenian adoption of the European Standard for Private Integrated Services Network (PISN) inter-exchange signalling protocol, specifically focusing on Call Identification and Call Linkage Additional Network Feature (ANF), as aligned with ISO/IEC 21889 (2001), with modifications. This standard defines how calls are uniquely identified throughout their route within a PISN and how logically linked calls can be tracked and managed. The provision of this ANF is essential for supporting advanced supplementary services and ensuring interoperability within complex, multi-exchange PISN environments.

Key Topics

• Global Call Identification (GID): Enables assigning a unique identifier to each call, which is maintained end-to-end between PISN exchanges (PINXs), enhancing call traceability and network management.
• Thread Identification: Allows linking together multiple calls that are logically connected, a vital feature for advanced telephony services such as call transfer and conferencing.
• Leg Identification: Facilitates identification of different segments (legs) of a call, supporting complex routing and supplementary services.
• Support for CSTA: Designed to facilitate the Computer Supported Telecommunications Applications (CSTA - ECMA-269) within a networked PISN, enhancing integration with computer-based communication systems.
• Protocol Scope: Specifies signalling at the Q reference point as part of the PSS1 (QSIG) protocol suite, ensuring compatibility and interoperability for inter-exchange communications in Private Integrated Services Networks.

Applications

The standard is especially relevant in environments where advanced call handling and supplementary services are mission-critical. Its practical value includes:

• Enterprise Telephony Systems: Supports organizations with large, distributed PISNs requiring reliable call management, auditing, and tracking across multiple geographic locations.
• Service Providers: Enables telecom providers to deliver value-added services (such as call transfer, conferencing, and call logging) with consistent identification and linkage of calls.
• Network Operations: Simplifies troubleshooting, monitoring, and auditing by ensuring all calls and associated events can be uniquely and consistently identified.
• Integration with IT Systems: Assists in merging telephony with IT through CSTA integration, unlocking unified communications, automated call handling, and enhanced reporting.
• Compliance & Security: Facilitates regulatory compliance by providing auditable call records, aiding in legal intercept, fraud prevention, and privacy enforcement.

Related Standards

To ensure full interoperability within PISNs, SIST EN 301 923 V1.1.1:2005 references and is closely aligned with several other European and international standards:

• EN 300 189: Addressing for PISN [ISO/IEC 11571, modified]
• EN 300 172: Inter-exchange signalling protocol; Circuit-mode basic services [ISO/IEC 11572, modified]
• EN 300 171: Service description, functional capabilities, and information flows [ISO/IEC 11574, modified]
• EN 300 239: Generic functional protocol for supplementary services [ISO/IEC 11582, modified]
• EN 301 922: Call identification and call linkage feature specification [ISO/IEC 21888, modified]
• EN 301 265, EN 300 366, EN 300 257: Various supplementary services protocols for call completion, call diversion, and call interception.
• CSTA (ECMA-269): Protocol support for Computer Supported Telecommunications Applications.

Summary

Implementing SIST EN 301 923 V1.1.1:2005 supports robust, scalable, and interoperable telephony operations in private integrated networks. Its comprehensive approach to call identification and linkage underpins advanced business communications and enables seamless supplementary service delivery across interconnected exchanges. This standard is vital for modern enterprise telephony, ensuring clarity, control, and efficiency in complex telecommunication environments.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Zasebno omrežje z integriranimi storitvami (PISN) - Medcentralni signalizacijski protokol - Dodatna omrežna lastnost (ANF): razpoznavanje klica in povezovanje klica [ISO/IEC 21889 (2001), spremenjen]Private Integrated Services Network (PISN); Inter-exchange signalling protocol; Call identification and call linkage Additional Network Feature (ANF) [ISO/IEC 21889 (2001), modified]33.040.35Telefonska omrežjaTelephone networksICS:Ta slovenski standard je istoveten z:EN 301 923 Version 1.1.1SIST EN 301 923 V1.1.1:2005en01-marec-2005SIST EN 301 923 V1.1.1:2005SLOVENSKI
STANDARD
ETSI ETSI EN 301 923 V1.1.1 (2004-01) 2
Reference DEN/ECMA-00203 Keywords ANF, endorsement, PISN, PSS1, QSIG, stage 3 ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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ETSI ETSI EN 301 923 V1.1.1 (2004-01) 3
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/home.asp). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This European Standard (Telecommunications series) has been produced by ECMA on behalf of its members and those of the European Telecommunications Standards Institute (ETSI). The present document is one of a series of standards defining services and signalling protocols applicable to Private Integrated Services Networks (PISN). The series uses the Integrated Services Digital Network (ISDN) concepts as developed by ITU-T and conforms to the framework of standards for Open Systems Interconnection (OSI) as defined by ISO/IEC. The present document specifies the signalling protocol for use at the Q reference point in support of the Call Identification and Call Linkage Additional Network Feature. The protocol defined in the present document forms part of the PSS1 protocol (informally known as QSIG). The present document endorses an International Standard, ISO/IEC 21889.
National transposition dates Date of adoption of this EN: 19 December 2003 Date of latest announcement of this EN (doa): 31 March 2004 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
30 September 2004 Date of withdrawal of any conflicting National Standard (dow): 30 September 2004
Endorsement notice The elements of International Standard ISO/IEC 21889 (2001) apply, with the following modifications. SIST EN 301 923 V1.1.1:2005

ETSI ETSI EN 301 923 V1.1.1 (2004-01) 4
Clause 3 Replace the first paragraph by: The following documents contain provisions which, through reference in this text, constitute provisions of the present document. • References are either specific (identified by date of publication and/or edition number or version number) or non-specific. • For a specific reference, subsequent revisions do not apply. • For a non-specific refer
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