SIST EN 300 356-9 V3.1.3:2003
(Main)Integrated Services Digital Network (ISDN); Signalling System No.7; ISDN User Part (ISUP) version 3 for the international interface; Part 9: Closed User Group (CUG) supplementary service [ITU-T Recommendation Q.735, clause 1 (1993), modified]
General Information
- Abstract
Additional generic procedures to those in basic call for use in this supplementary service.
- Status
- Published
- Publication Date
- 30-Nov-2003
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Dec-2003
- Due Date
- 01-Dec-2003
- Completion Date
- 01-Dec-2003
Overview
SIST EN 300 356-9 V3.1.3:2003 specifies requirements for the Closed User Group (CUG) supplementary service within the Integrated Services Digital Network (ISDN). This standard details the stage three protocol procedures and switching functions necessary for international interoperability using Signalling System No.7 (SS7) and ISDN User Part (ISUP) version 3. It aligns with, and modifies, ITU-T Recommendation Q.735, focusing on enhancing secure group communications for users in pan-European ISDN environments.
The CUG supplementary service enables organizations and telecommunications operators to restrict network access, allowing defined users to communicate exclusively within assigned closed groups. This capability is fundamental for enterprise, governmental, and secure sector communications across international networks.
Key Topics
- Closed User Group (CUG) Functionality: Defines procedures allowing network users to form exclusive groups restricting both inbound and outbound traffic outside the group, enhancing privacy and security.
- Protocol Procedures: Specifies how ISUP version 3, within the SS7 environment for international interfaces, supports CUG supplementary service signaling and message handling.
- International ISDN Interconnection: Addresses requirements and functions necessary when connecting ISDN services between networks of different countries, focusing on compatible message formats, signaling codes, and switching logic.
- Compliance with Existing Frameworks: Integrates with pan-European ISDN standards and aligns with the three-level CCITT methodology (service description, functional capabilities, protocol specifications).
- Normative References: The document cross-references base standards such as ETS 300 136 (service description), ETS 300 137 (capabilities and flows), and ITU-T recommendations Q.730-Q.764 for protocol standards compliance.
Applications
The CUG supplementary service as defined in this standard provides practical solutions for:
- Enterprise Communication: Corporations requiring restricted communication channels for management or project teams across various locations.
- Financial Services: Secure inter-branch communication without exposure to public network traffic, ensuring regulatory compliance and privacy.
- Government & Defense: Restricted communications within departments or between authorized agencies, supporting secure policy development and operational activities.
- Multinational Organizations: Seamless international closed group communications, leveraging pan-European ISDN interoperability.
- Telecom Service Providers: Implementation of value-added services for business clients who require differentiation through exclusive group calling features.
Related Standards
To achieve comprehensive ISDN interoperability and successful CUG supplementary service deployment, the following standards are closely related:
- ETS 300 136: ISDN; Closed User Group supplementary service - Service description.
- ETS 300 137: ISDN; Closed User Group supplementary service - Functional capabilities and information flows.
- ETS 300 138-1: ISDN; CUG supplementary service - DSS1 protocol specification.
- EN 300 356-1 and EN 300 356-2: ISUP version 3 for international interface - Basic services and supplementary services.
- EN 300 403-1: ISDN basic call control signaling protocol.
- ITU-T Recommendation Q.735: Foundational international recommendation for CUG service, adapted in this standard.
Keywords: ISDN, SS7, ISUP, Closed User Group, supplementary service, telecommunications standards, international interface.
By following SIST EN 300 356-9 V3.1.3:2003, organizations and telecom providers ensure robust, secure, and standards-based implementation of CUG features within international ISDN networks, supporting high levels of privacy and exclusive access as required by modern business and governmental communications.
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Frequently Asked Questions
SIST EN 300 356-9 V3.1.3:2003 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Integrated Services Digital Network (ISDN); Signalling System No.7; ISDN User Part (ISUP) version 3 for the international interface; Part 9: Closed User Group (CUG) supplementary service [ITU-T Recommendation Q.735, clause 1 (1993), modified]". This standard covers: Additional generic procedures to those in basic call for use in this supplementary service.
Additional generic procedures to those in basic call for use in this supplementary service.
SIST EN 300 356-9 V3.1.3:2003 is classified under the following ICS (International Classification for Standards) categories: 33.080 - Integrated Services Digital Network (ISDN). The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 300 356-9 V3.1.3:2003 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Integrated Services Digital Network (ISDN); Signalling System No.7; ISDN User Part (ISUP) version 3 for the international interface; Part 9: Closed User Group (CUG) supplementary service [ITU-T Recommendation Q.735, clause 1 (1993), modified]33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:EN 300 356-9 Version 3.1.3SIST EN 300 356-9 V3.1.3:2003en01-december-2003SIST EN 300 356-9 V3.1.3:2003SLOVENSKI
STANDARD
EN 300 356-9 V3.1.3 (1998-08)European Standard (Telecommunications series)Integrated Services Digital Network (ISDN);Signalling System No.7;ISDN User Part (ISUP) version 3 for the international interface;Part 9: Closed User Group (CUG)supplementary service[ITU-T Recommendation Q.735, clause 1 (1993), modified]SIST EN 300 356-9 V3.1.3:2003
ETSIEN 300 356-9 V3.1.3 (1998-08)2ReferenceREN/SPS-01039-9 (3aq91ie0.PDF)KeywordsISDN, ISUP, SS7, supplementary service, CUGETSIPostal addressF-06921 Sophia Antipolis Cedex - FRANCEOffice address650 Route des Lucioles - Sophia AntipolisValbonne - FRANCETel.: +33 4 92 94 42 00
Fax: +33 4 93 65 47 16Siret N° 348 623 562 00017 - NAF 742 CAssociation à but non lucratif enregistrée à laSous-Préfecture de Grasse (06) N° 7803/88Internetsecretariat@etsi.frhttp://www.etsi.frhttp://www.etsi.orgCopyright NotificationNo 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 1998.All rights reserved.SIST EN 300 356-9 V3.1.3:2003
ETSIEN 300 356-9 V3.1.3 (1998-08)3Intellectual Property RightsIPRs essential or potentially essential to the present document may have been declared to ETSI. The informationpertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be foundin SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respectof ETSI standards", which is available free of charge from the ETSI Secretariat. Latest updates are available on theETSI Web server (http://www.etsi.fr/ipr or http://www.etsi.org/ipr).Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guaranteecan 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.ForewordThis European Standard (Telecommunications series) has been produced by ETSI Technical Committee SignallingProtocols and Switching (SPS).The present document is part 9 of a multi-part EN covering the ISDN User Part (ISUP) version 3 for the internationalinterface, as identified below:Part 1:"Basic services";Part 2:"ISDN supplementary services";Part 3:"Calling Line Identification Presentation (CLIP) supplementary service";Part 4:"Calling Line Identification Restriction (CLIR) supplementary service";Part 5:"Connected Line Identification Presentation (COLP) supplementary service";Part 6:"Connected Line Identification Restriction (COLR) supplementary service";Part 7:"Terminal Portability (TP) supplementary service";Part 8:"User-to-User Signalling (UUS) supplementary service";Part 9:"Closed User Group (CUG) supplementary service";Part 10:"Subaddressing (SUB) supplementary service";Part 11:"Malicious Call Identification (MCID) supplementary service";Part 12:"Conference Call, add-on (CONF) supplementary service";Part 14:"Explicit Call Transfer (ECT) supplementary service";Part 15:"Diversion supplementary services";Part 16:"Call Hold (HOLD) supplementary service";Part 17:"Call Waiting (CW) supplementary service";Part 18:"Completion of Calls to Busy Subscriber (CCBS) supplementary service";Part 19:"Three party (3PTY) supplementary service".Part 20:"Completion of Calls on No Reply (CCNR) supplementary service";Part 31:"Protocol Implementation Conformance Statement (PICS) proforma specification for basic services"Part 32:"Test Suite Structure and Test Purposes (TSS&TP) specification for basic services"Part 33:"Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT)proforma specification for basic services"Part 34:"Protocol Implementation Conformance Statement (PICS) proforma specification for supplementaryservices"Part 35:"Test Suite Structure and Test Purposes (TSS&TP) specification for supplementary services"Part 36:"Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT)proforma specification for supplementary services"NOTE:Part 13 has not been issued.SIST EN 300 356-9 V3.1.3:2003
ETSIEN 300 356-9 V3.1.3 (1998-08)4In accordance with CCITT Recommendation I.130, the following three level structure is used to describe thesupplementary telecommunication services as provided by European public telecommunications operators under thepan-European Integrated Services Digital Network (ISDN):-Stage 1: is an overall service description, from the user's stand-point;-Stage 2: identifies the functional capabilities and information flows needed to support the service described instage 1; and-Stage 3: defines the signalling system protocols and switching functions needed to implement the servicedescribed in stage 1.The present document details the stage three aspects (signalling system protocols and switching functions) needed tosupport the Closed User Group (CUG) supplementary service. The stage 1 and stage 2 aspects are detailed inETS 300 136 and ETS 300 137, respectively.National transposition datesDate of adoption of this EN:7 August 1998Date of latest announcement of this EN (doa):30 November 1998Date of latest publication of new National Standardor endorsement of this EN (dop/e):31 May 1999Date of withdrawal of any conflicting National Standard (dow):31 May 1999Endorsement noticeThe text of ITU-T Recommenda
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