SIST ETS 300 770-1:1998

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; Closed User Group (CUG) supplementary service; Part 1: Protocol specification [ITU-T Recommendation Q.2955.1 (1996), modified]33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:ETS 300 770-1 E3SIST ETS 300 770-1:1998en01-DSULO19983SIST ETS 300 770-1:1998SLOVENSKI
STANDARD
DRAFTEUROPEANprETS 300 770-1TELECOMMUNICATIONOctober 1996STANDARDSource: ETSI TC-SPSReference: DE/SPS-05100-1ICS:33.080Key words:B-ISDN, DSS2, supplementary service, CUGBroadband Integrated Services Digital Network (B-ISDN);Digital Subscriber Signalling System No. two (DSS2) protocol;Closed User Group (CUG) supplementary service;Part 1: Protocol specification[ITU-T Recommendation Q.2955.1, modified]ETSIEuropean Telecommunications Standards InstituteETSI SecretariatPostal address: F-06921 Sophia Antipolis CEDEX - FRANCEOffice address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCEX.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat@etsi.frTel.: +33 4 92 94 42 00 - Fax: +33 4 93 65 47 16Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and theforegoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1996. All rights reserved.SIST ETS 300 770-1:1998

Page 2Draft prETS 300 770-1: October 1996ForewordThis draft European Telecommunication Standard (ETS) has been produced by the Signalling Protocolsand Switching (SPS) Technical Committee of the European Telecommunications Standards Institute(ETSI), and is now submitted for the Public Enquiry phase of the ETSI standards approval procedure.This ETS is part 1 of a multi-part standard covering the Digital Subscriber Signalling System No. two(DSS2) protocol specification for the Broadband Integrated Services Digital Network (B-ISDN) ClosedUser Group (CUG) supplementary service, as described below:Part 1:"Protocol specification";Part 2:"Protocol Implementation Conformance Statement (PICS) proforma specification";Part 3:"Test Suite Structure and Test Purposes (TSS&TP) specification for the user";Part 4:"Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing(PIXIT) proforma specification for the user";Part 5:"TSS&TP specification for the network";Part 6:"ATS and partial PIXIT proforma specification for the network".NOTE:The final structure of the parts containing the test specifications is currently understudy.In accordance with CCITT Recommendation I.130, the following three level structure is used to describethe supplementary telecommunication services as provided by European public telecommunicationsoperators under the pan-European B-ISDN:-Stage 1: is an overall service description, from the user's standpoint;-Stage 2: identifies the functional capabilities and information flows needed to support the servicedescribed in stage 1; and-Stage 3: defines the signalling system protocols and switching functions needed to implement theservice described in stage 1.This ETS details the stage 3 aspects (signalling system protocols and switching functions) needed tosupport the CUG supplementary service. The stage 1 and stage 2 aspects of the equivalent N-ISDNsupplementary service are detailed in ETS 300 136 and ETS 300 137, respectively, and these have beenassumed as appropriate to be the foundation of the equivalent B-ISDN supplementary servicespecifications.Proposed transposition datesDate of latest announcement of this ETS (doa):3 months after ETSI publicationDate of latest publication of new National Standardor endorsement of this ETS (dop/e):6 months after doaDate of withdrawal of any conflicting National Standard (dow):6 months after doaWhilst every care has been taken in the preparation and publication of this document, errors in content,typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to"ETSI Editing and Committee Support Dept." at the address shown on the title page.SIST ETS 300 770-1:1998

Page 3Draft prETS 300 770-1: October 1996Endorsement noticeThe text of draft ITU-T Recommendation Q.2955.1 is proposed by ETSI as an ETS with agreedmodifications as given below.NOTE 1:New or modified text is indicated using sidebars. In addition, underlining and/or strike-out are used to highlight detailed modifications where necessary.NOTE 2:ITU-T Recommendation Q.2955.1 was not yet adopted by ITU-T prior to thesubmission for Public Enquiry of this ETS. This endorsement is based upon ITU-TStudy Group 11 Report COM 11-R 186-E (April 1996).subclause 1.1Replace subclause 1.1 by:1.1ScopeThis first part of ETS 300 770 specifies the stage three of the Closed User Group (CUG) supplementaryservice for the pan-European Broadband Integrated Services Digital Network (B-ISDN) as provided byEuropean public telecommunications operators at the TB reference point or coincident SB and TBreference point (as defined in ITU-T Recommendation I.413 [1]) by means of the Digital SubscriberSignalling System No. two (DSS2) protocol. Stage three identifies the protocol and procedures andswitching functions needed to support a telecommunication service (see ITU-T RecommendationI.130 [2]).In addition, this ETS specifies the protocol requirements at the TB reference point where the service isprovided to the user via a private B-ISDN.This ETS does not specify the additional protocol requirements where the service is provided to the uservia a telecommunications network that is not a B-ISDN.The CUG supplementary service enables users to form groups, to and from which access is restricted. Aspecific user may be a member of one or more closed user groups. Members of a specific closed usergroup can communicate among themse
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