SIST ETS 300 661-1:1999
(Main)Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; Direct Dialling In (DDI) supplementary service; Part 1: Protocol specification [ITU-T Recommendation Q.2951, clause 1 (1995), modified]
General Information
- Abstract
B-ISDN UNI layer 3 signalling protocol for supplementary services, B-I SDN CS1
- Status
- Published
- Publication Date
- 30-Apr-1999
- Technical Committee
- SPS - Signalling protocols and switching
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-May-1999
- Due Date
- 01-May-1999
- Completion Date
- 01-May-1999
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Overview
SIST ETS 300 661-1:1999 specifies the signalling protocols and procedures required to support the Direct Dialling In (DDI) supplementary service, using the Digital Subscriber Signalling System No. two (DSS2) protocol, within a Broadband Integrated Services Digital Network (B-ISDN) environment. This standard aligns with ITU-T Recommendation Q.2951 (clause 1, 1995, modified) and is intended for use at the User-Network Interface (UNI) at the TB reference point or the coincident SB and TB reference point, as defined in ITU-T Recommendation I.413.
The primary focus of this standard is to define the stage 3 (signalling system protocols and switching functions) needed to implement DDI, enabling direct inward dialling to private B-ISDN users by utilizing the public ISDN numbering plan. This ensures seamless call establishment between public and private ISDN networks over broadband infrastructure.
Key Topics
- B-ISDN and DSS2 Protocol: The standard covers the use of the DSS2 protocol at the UNI, supporting advanced broadband services through ISDN technology.
- Direct Dialling In (DDI) Supplementary Service: Specifies the protocol for allowing calls from the public B-ISDN to be directly routed to individual users on a private B-ISDN network without operator intervention.
- Number Handling: Stipulates transfer of the DDI number, which may be a full ISDN or partial number significant to the private network, either en-bloc or by overlap receiving procedures.
- Service Subscription and Operation: DDI supplementary service is available based on prior arrangement and can be withdrawn as requested by the subscriber or for administrative reasons.
- Compatibility and Coexistence: Addresses the mutual exclusivity and potential coexistence with other services, such as the multiple subscriber number service, and describes interactions with other supplementary services.
- Protocol Specification: Details modifications to referred international recommendations for regional application (e.g., amendments to ITU-T Q.2951).
Applications
The protocol definition in SIST ETS 300 661-1:1999 is widely applicable for:
- Telecommunications Equipment Manufacturers: Ensuring that network equipment provides compliant B-ISDN DDI supplementary services at defined network interfaces.
- Public Network Operators: Deploying enhanced calling features such as direct inward dialling for enterprise customers using private ISDN installations.
- Private Networks and PBX Systems: Enabling businesses to manage internal call routing based on delivered DDI numbers from public B-ISDN networks.
- Conformance Testing: Serving as the baseline for protocol implementation, conformance statements, and testing (further detailed in other parts of the ETS 300 661 series).
The DDI service allows organizations connected to a public B-ISDN to offer unique direct numbers to employees or departments, enhancing call management and routing efficiency, and supporting a broad range of telecommunication services.
Related Standards
For comprehensive implementation and conformance, the following related standards provide essential references:
- ITU-T Recommendation Q.2951: Defines the international basis for DDI supplementary service protocols.
- ETSI ETS 300 062 & ETS 300 063: Stage 1 and 2 specifications for N-ISDN supplementary services, foundational for B-ISDN.
- ETS 300 443-1: DSS2 protocol specification for basic call/bearer control at the B-ISDN UNI.
- ETS 300 669-1: Protocol specification for interactions of supplementary services in B-ISDN.
- ITU-T I.112 & I.210: Vocabulary and principles guiding ISDN and supplementary services.
Practical Value
Implementation of SIST ETS 300 661-1:1999 ensures standardized, interoperable B-ISDN DDI supplementary service delivery, streamlining business communications and network operations across public and private ISDN environments. This standard is crucial for maintaining compatibility within the evolving broadband telecommunication landscape.
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Frequently Asked Questions
SIST ETS 300 661-1:1999 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; Direct Dialling In (DDI) supplementary service; Part 1: Protocol specification [ITU-T Recommendation Q.2951, clause 1 (1995), modified]". This standard covers: B-ISDN UNI layer 3 signalling protocol for supplementary services, B-I SDN CS1
B-ISDN UNI layer 3 signalling protocol for supplementary services, B-I SDN CS1
SIST ETS 300 661-1:1999 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 ETS 300 661-1:1999 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.Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; Direct Dialling In (DDI) supplementary service; Part 1: Protocol specification [ITU-T Recommendation Q.2951, clause 1 (1995), modified]33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:ETS 300 661-1 E13SIST ETS 300 661-1:199en01-DSULO-1993SIST ETS 300 661-1:199SLOVENSKI
STANDARD
FINAL DRAFTEUROPEANprETS 300 661-1TELECOMMUNICATIONFebruary 1997STANDARDSource: ETSI TC-SPSReference: DE/SPS-05071-1ICS:33.020Key words:B-ISDN, DSS2, supplementary service, DDIBroadband Integrated Services Digital Network (B-ISDN);Digital Subscriber Signalling System No. two (DSS2) protocol;Direct Dialling In (DDI) supplementary service;Part 1: Protocol specification[ITU-T Recommendation Q.2951, clause 1 (1995), 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 1997. All rights reserved.SIST ETS 300 661-1:1999
Page 2Final draft prETS 300 661-1: February 1997ForewordThis final draft European Telecommunication Standard (ETS) has been produced by the SignallingProtocols and Switching (SPS) Technical Committee of the European Telecommunications StandardsInstitute (ETSI), and is now submitted for the Voting 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) DirectDialling In (DDI) 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".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 DDI supplementary service. The stage 1 and stage 2 aspects of the equivalent N-ISDNsupplementary services are detailed in ETS 300 062 and ETS 300 063, respectively, and have beenassumed as appropriate to be the foundation for 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 doaEndorsement noticeThe text of ITU-T Recommendation Q.2951, clause 1 (1995) was approved
by ETSI as an ETS withagreed modifications as given below.NOTE:New or modified text is indicated using sidebars. In addition, underlining and/or strike-out are used to highlight detailed modifications where necessary.Whilst 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 300 661-1:1999
Page 3Final draft prETS 300 661-1: February 1997subclause 1.1Replace subclause 1.1 by:1.1ScopeThis first part of ETS 300 661 specifies the stage three of the Direct Dialling In (DDI) 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 DDI supplementary service enables a user to call directly via a public B-ISDN a user on a privateB-ISDN by using the public ISDN numbering plan.The DDI supplementary service is applicable to all telecommunication services.Further parts of this ETS specify the method of testing required to identify conformance to this ETS.This ETS is applicable to equipment, supporting the DDI supplementary service, to be attached at eitherside of a TB reference point or coincident SB and TB reference point when used as an access to the publicB-ISDN.subclause 1.2, first paragraphReplace the first paragraph of subclause 1.2 by:This ETS incorporates by dated and undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listedhereafter. For dated references, subsequent amendments to or revisions of any of these publicationsapply to this ETS only when incorporated in it by amendment or revision. For undated references the latestedition of the publication referred to applies.subclause 1.2Insert the following references at the end of subclause 1.2:[7]ETS 300 443-1: "Broadband Integrated Services Digital Network (B-ISDN);Digital Subscriber
...
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01-maj-1999
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Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling
System No. two (DSS2) protocol; Direct Dialling In (DDI) supplementary service; Part 1:
Protocol specification [ITU-T Recommendation Q.2951, clause 1 (1995), modified]
Ta slovenski standard je istoveten z: ETS 300 661-1 Edition 1
ICS:
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN ETS 300 661-1
TELECOMMUNICATION July 1998
STANDARD
Source: SPS Reference: DE/SPS-05071-1
ICS: 33.020
Key words: B-ISDN, DSS2, supplementary service, DDI
Broadband Integrated Services Digital Network (B-ISDN);
Digital Subscriber Signalling System No. two (DSS2) protocol;
Direct Dialling In (DDI) supplementary service;
Part 1: Protocol specification
[ITU-T Recommendation Q.2951, clause 1 (1995), modified]
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Internet: secretariat@etsi.fr - http://www.etsi.fr - http://www.etsi.org
Tel.: +33 4 92 94 42 00 - Fax: +33 4 93 65 47 16
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 1998. All rights reserved.
Page 3
ETS 300 661-1: July 1998
Foreword
This European Telecommunication Standard (ETS) has been produced by the Signalling Protocols and
Switching (SPS) Technical Committee of the European Telecommunications Standards Institute (ETSI).
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) Direct
Dialling In (DDI) 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".
In accordance with CCITT Recommendation I.130, the following three level structure is used to describe
the supplementary telecommunication services as provided by European public telecommunications
operators 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 service
described in stage 1; and
- Stage 3: defines the signalling system protocols and switching functions needed to implement the
service described in stage 1.
This ETS details the stage 3 aspects (signalling system protocols and switching functions) needed to
support the DDI supplementary service. The stage 1 and stage 2 aspects of the equivalent N-ISDN
supplementary services are detailed in ETS 300 062 and ETS 300 063, respectively, and have been
assumed as appropriate to be the foundation for the equivalent B-ISDN supplementary service
specifications.
Transposition dates
Date of adoption of this ETS: 2 May 1997
Date of latest announcement of this ETS (doa): 31 October 1998
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 30 April 1999
Date of withdrawal of any conflicting National Standard (dow): 30 April 1999
Endorsement notice
The text of ITU-T Recommendation Q.2951, clause 1 (1995) was approved by ETSI as an ETS with
agreed modifications as given below.
NOTE: New or modified text is indicated using sidebars. In addition, underlining and/or strike-
out are used to highlight detailed modifications where necessary.
Whilst 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 Standards Making Support Dept." at the address shown on the title page.
Page 4
ETS 300 661-1: July 1998
subclause 1.1
Replace subclause 1.1 by:
1.1 Scope
This first part of ETS 300 661 specifies the stage three of the Direct Dialling In (DDI) supplementary
service for the pan-European Broadband Integrated Services Digital Network (B-ISDN) as provided by
European public telecommunications operators at the T reference point or coincident S and T
B B B
reference point (as defined in ITU-T Recommendation I.413 [1]) by means of the Digital Subscriber
Signalling System No. two (DSS2) protocol. Stage three identifies the protocol and procedures and
switching functions needed to support a telecommunication service (see ITU-T Recommendation
I.130 [2]).
In addition, this ETS specifies the protocol requirements at the T reference point where the service is
B
provided to the user via a private B-ISDN.
This ETS does not specify the additional protocol requirements where the service is provided to the user
via a telecommunications network that is not a B-ISDN.
The DDI supplementary service enables a user to call directly via a public B-ISDN a user on a private
B-ISDN by using the public ISDN numbering plan.
The DDI supplementary service is applicable to all telecommunication services.
Further parts of this ETS specify the method of testing required to identify conformance to this ETS.
This ETS is applicable to equipment, supporting the DDI supplementary service, to be attached at either
side of a T reference point or coincident S and T reference point when used as an access to the public
B B B
B-ISDN.
subclause 1.2, first paragraph
Replace the first paragraph of subclause 1.2 by:
This ETS incorporates by dated and undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications
apply to this ETS only when incorporated in it by amendment or revision. For undated references the latest
edition of the publication referred to applies.
subclause 1.2
Insert the following references at the end of subclause 1.2:
[7] ETS 300 443-1: "Broadband Integrated Services Digital Network (B-ISDN);
Digital Su
...