SIST EN 301 655 V1.1.1:2005

• Abstract:

  This European Normes (EN) contains the specification, functional model and information flows for the Call priority interruption supplementar

• Status: Published
• Publication Date: 30-Apr-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-May-2005
• Due Date: 01-May-2005
• Completion Date: 01-May-2005
• Mandate: IT-74
• Ref Project: ETSI EN 301 655 V1.1.1 (1999-08) - Private Integrated Services Network (PISN); Specification, functional model and information flows; Call priority interruption and call priority interruption protection supplementary services; [ISO/IEC 15991 (1998), modified]

Overview

SIST EN 301 655 V1.1.1:2005 is a European Standard specifying the supplementary services of call priority interruption and call priority interruption protection within Private Integrated Services Networks (PISN). This document details the service specification, functional model, and information flows required for implementing these services. Developed by the European Telecommunications Standards Institute (ETSI) and aligned with ISO/IEC 15991 (1998) with certain modifications, this standard addresses the need for prioritized call handling in private telecommunication environments such as enterprise and organizational networks.

Call priority interruption services are essential for allowing high-priority communications to take precedence, which can be critical in scenarios where urgent or emergency information needs immediate response. The protection aspect ensures that certain calls cannot be interrupted, preserving crucial communications.

Key Topics

• Call Priority Interruption (CPI):

  • Defines how a telephone call with elevated importance can be initiated, overriding existing lower-priority calls.
  • Establishes processes for interrupting ongoing calls within the Private Integrated Services Network where justified by priority.

• Call Priority Interruption Protection (CPIP):

  • Outlines mechanisms to safeguard specific calls against interruption, even if higher-priority requests are made.
  • Ensures continuity for mission-critical conversations by setting interruption protection status.

• Functional Model and Information Flows:

  • Provides a standardized model detailing service behavior and associated signalling flows between network elements.
  • Promotes interoperability among PISN systems and components by following the ISDN and OSI reference frameworks.

• References to Modified International Standards:

  • Harmonized with related EN, ETS, and ISO/IEC documentation for seamless integration and best practices.

Applications

The specification is directly relevant for organizations deploying Private Integrated Services Networks, such as:

• Enterprise Communications:

  • Enables differentiated call handling in large offices, government facilities, and campus environments.
  • Supports users whose roles require prioritized access to voice communication, for example, security personnel and emergency teams.

• Critical Infrastructure & Emergency Services:

  • Provides a foundation for telecom systems where urgent calls must override standard or routine communications.
  • Protects essential communications that must continue uninterrupted during high-priority events.

• Custom Telecom Solutions:

  • Facilitates integration of priority call features in vendor-specific PISN platforms where open standards are required for interoperability and regulatory compliance.

By following SIST EN 301 655, network administrators and system integrators ensure robust, standards-based behavior for call prioritization and protection within private telephony networks.

Related Standards

For comprehensive implementation and compatibility, the following standards are closely related and referenced within SIST EN 301 655:

• EN 300 171: PISN control aspects of circuit-mode basic services
• EN 301 256: PISN call interception feature
• EN 301 657: PISN call handling additional features
• ETS 300 256: PISN diversion supplementary services
• ETS 300 258: PISN path replacement services
• ETS 300 260: PISN call transfer supplementary services
• ETS 300 365: PISN call completion supplementary services
• ETS 300 387: PTN method for specification of basic and supplementary services
• ETS 300 475-1: Reference configuration for Private Telecommunication Network exchanges

By referencing and aligning with these standards, SIST EN 301 655 ensures compatibility and interoperability within modern private network environments.

---

Keywords: Private Integrated Services Network, PISN, call priority interruption, call protection, supplementary services, telecommunications standard, enterprise telephony, ETSI, ISO/IEC 15991, EN 301 655, network interoperability

SLOVENSKI STANDARD
01-maj-2005
=DVHEQRRPUHåMH]LQWHJULUDQLPLVWRULWYDPL3,616SHFLILNDFLMDIXQNFLMVNLPRGHO
LQLQIRUPDFLMVNLSUHWRNL'RSROQLOQDVWRULWHYSUHNLQLWHYSUHGQRVWQHJDNOLFDLQ
]DãþLWDSUHGSUHNLQLWYLMRSUHGQRVWQHJDNOLFD>,62,(&VSUHPHQMHQ@
Private Integrated Services Network (PISN); Specification, functional model and
information flows; Call priority interruption and call priority interruption protection
supplementary services; [ISO/IEC 15991 (1998), modified]
Ta slovenski standard je istoveten z: EN 301 655 Version 1.1.1
ICS:
33.040.35 Telefonska omrežja Telephone networks
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

European Standard (Telecommunications series)
Private Integrated Services Network (PISN);
Specification, functional model and information flows;
Call priority interruption and call priority interruption
protection supplementary services
[ISO/IEC 15991 (1998), modified]

2 ETSI EN 301 655 V1.1.1 (1999-08)
Reference
DEN/ECMA-00185 (fbo00ico.PDF)
Keywords
PISN, VPN
ETSI
Postal address
F-06921 Sophia Antipolis Cedex - FRANCE
Office address
650 Route des Lucioles - Sophia Antipolis
Valbonne - FRANCE
Tel.: [phone]  Fax: [phone]
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Internet
[e-mail]
Individual copies of this ETSI deliverable
can be downloaded from
http://www.etsi.org
If you find errors in the present document, send your
comment to: [e-mail]
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1999.
All rights reserved.
ETSI
3 ETSI EN 301 655 V1.1.1 (1999-08)
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 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://www.etsi.org/ipr).
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 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 European Computer Manufacturers
Association (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.
This particular EN specifies the Call Priority Interruption and Call Priority Interruption Protection Supplementary
Services.
National transposition dates
Date of adoption of this EN: 13 August 1999
Date of latest announcement of this EN
...