SIST ETS 300 796-1:1998

• Abstract:

  B-ISDN UNI layer 3 signalling protocol for supplementary services, B-ISDN CS2

• Status: Published
• Publication Date: 31-Aug-1998
• ICS: 33.080 - Integrated Services Digital Network (ISDN)
• Technical Committee: SPS - Signalling protocols and switching
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Sep-1998
• Due Date: 01-Sep-1998
• Completion Date: 01-Sep-1998
• Ref Project: ETSI ETS 300 796-1 ed.1 (1997-09) - Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; Generic functional protocol; Core aspects; Part 1: Protocol specification [ITU-T Recommendation Q.2932.1 (1996), modified]

SIST ETS 300 796-1:1998 is the Slovenian adoption of ETSI ETS 300 796-1, based on ITU-T Recommendation Q.2932.1 (1996) with agreed modifications. It specifies the Broadband Integrated Services Digital Network (B-ISDN) Digital Subscriber Signalling System No. two (DSS2) generic functional protocol, Part 1 protocol specification, for supplementary services at the TB reference point for equipment on public ISDN access.

What does SIST ETS 300 796-1:1998 specify?

SIST ETS 300 796-1:1998 specifies the B-ISDN UNI layer 3 signalling protocol for supplementary services in B-ISDN CS2. It is the functional protocol for local information exchange at the TB reference point, or the coincident SB and TB reference point, and it applies to equipment that supports additional basic call capabilities and supplementary services.

The document is part 1 of a multi-part ETS covering the DSS2 generic functional protocol. The foreword identifies the related parts for conformance statements and test specifications, and the main text is supplemented by normative annexes A and B and informative appendices I-V.

What are the key requirements of SIST ETS 300 796-1:1998?

SIST ETS 300 796-1:1998 defines how supplementary-service signalling is carried using the Facility information element. In practice, this means the user equipment must understand and generate the protocol elements needed to handle these services without human intervention.

• Clause 1.1 limits the protocol to activation, deactivation, invocation, operation, interrogation, status request and status notification. This tells implementers which service actions the protocol must support.
• Clause 1.1 applies the protocol to additional basic call capabilities and supplementary services, either during an existing call or outside any existing call. That matters because the signalling must work both in-call and for standalone service control.
• Clause 1.1 states that individual supplementary services are defined in their own ETSs. So this document is the generic framework, while service-specific behavior comes from the separate capability standards.
• Clause 1.1 says conformance is based on external behaviour at the TB or coincident SB and TB reference point. Testers therefore check the observed message structure and sequence, not internal implementation details.
• Clause 1.2 ties the protocol to related ETSI specifications such as ETS 300 437-1, ETS 300 443-1, ETS 300 662-1, ETS 300 667-1 and ETS 300 771-1. These references are what align this generic protocol with signalling support, call control and named supplementary services.
• The modified tables and figures adjust message mappings, state procedures and protocol diagrams. For implementers, this affects how DSS1 and DSS2 messages are translated and how specific release and data procedures are handled.
• Tables 2 and 4 add maximum lengths for certain information elements, and table 10 corrects an octet reference. This is important for encoding and message sizing.
• Clause 9.4.2.5 and annexes A and B address formal data types and ASN.1 usage. That matters when the supplementary-service definitions need machine-readable structure for implementation and testing.

What terms does SIST ETS 300 796-1:1998 define?

• Broadband Integrated Services Digital Network (B-ISDN) - the broadband ISDN environment in which this DSS2 protocol operates.
• Digital Subscriber Signalling System No. two (DSS2) - the signalling system used for the layer 3 procedures covered by the standard.
• TB reference point - the interface point used as the basis for conformance and signalling exchange.
• Facility information element - the information element on which the protocol is based.
• Protocol Implementation Conformance Statement (PICS) - the proforma used to state what an implementation supports.
• Test Suite Structure and Test Purposes (TSS&TP) - the specification that organizes the tests and their intended coverage.
• Abstract Test Suite (ATS) - the formal test cases used to check conformance.
• Partial Protocol Implementation eXtra Information for Testing (PIXIT) - the extra implementation information needed to run the tests.

Who uses SIST ETS 300 796-1:1998?

SIST ETS 300 796-1:1998 is used by telecom equipment designers, protocol implementers, test laboratories and conformance engineers working on B-ISDN and public ISDN access. It matters to anyone building user equipment that supports supplementary services, because the protocol must behave correctly at the TB or coincident SB and TB reference point.

It is also relevant to teams preparing PICS, TSS&TP, ATS and PIXIT material, since the foreword makes this standard part of a multi-part conformance and testing framework. Quality managers and buyers can use it to check whether a product claims the right DSS2 supplementary-service support.

Which standards are used with SIST ETS 300 796-1:1998?

• ITU-T Recommendation I.413 - defines the TB reference point and the coincident SB and TB reference point used in the scope.
• ETS 300 437-1 - provides SSCF support for signalling at the User-Network Interface (UNI).
• ETS 300 443-1 - gives the B-ISDN user-network interface layer 3 basic call/bearer control specification used as a related signalling reference.
• ETS 300 662-1 - covers the Multiple Subscriber Number (MSN) supplementary service.
• ETS 300 667-1 - covers the Subaddressing (SUB) supplementary service.
• ETS 300 771-1 - covers point-to-multipoint call/bearer control.
• ITU-T Recommendation X.680 and ITU-T Recommendation X.880 - support the formal ASN.1 data type definitions used in the protocol.
• ITU-T Recommendation Q.2932.1 (1996) - is the base recommendation this ETS modifies.
• The foreword also names Parts 2 to 6 of ETS 300 796 as the companion conformance and test documents.

What does the SIST ETS 300 796-1:1998 document contain?

SIST ETS 300 796-1:1998 contains protocol diagrams, message mappings, state procedures and ASN.1-related definitions for DSS2 supplementary-service signalling. The modified figures include the local information exchange model and several state-machine sheets that control message handling and release behaviour.

The tables cover message translations between DSS1 and DSS2, parameters for release handling, and information element limits. Annex A and annex B are normative, while appendices I-V are informative and provide supporting material for implementation and testing.

The document also includes corrected module identifiers for ASN.1 modules and revised references inside the protocol text. For a reader, that means the standard is not just a high-level description - it gives the concrete signalling model, coding references and test-relevant behavior needed to build and verify interoperable equipment.

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; Generic functional protocol; Core aspects; Part 1: Protocol specification [ITU-T Recommendation Q.2932.1 (1996), modified]33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:ETS 300 796-1 E13SIST ETS 300 796-1:1998en01-DSULO19983SIST ETS 300 796-1:1998SLOVENSKI
STANDARD
EUROPEANETS 300 796-1TELECOMMUNICATIONSeptember 1997STANDARDSource: SPSReference: DE/SPS-05101-1ICS:33.020Key words:B-ISDN, broadband, DSS2, functional, generic, ISDN, layer 3, protocolBroadband Integrated Services Digital Network (B-ISDN);Digital Subscriber Signalling System No. two (DSS2) protocol;Generic functional protocol;Core aspects;Part 1: Protocol specification[ITU-T Recommendation Q.2932.1 (1996), 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: [e-mail].: [phone] - Fax: [phone]Copyright 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 300 796-1:1998

Page 2ETS 300 796-1: September 1997ForewordThis European Telecommunication Standard (ETS) has been produced by the Signalling Protocols andSwitching (SPS) Technical Committee of the European Telecommunications Standards Institute (ETSI).This ETS is part 1 of a multi-part standard covering the Integrated Services Digital Network (ISDN) DigitalSubscriber Signalling System No. two (DSS2) core aspects of the generic functional protocol as describedbelow:Part 1:"Protocol specification [ITU-T Recommendation Q.2932.1 (1996), modified]";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.Transposition datesDate of adoption:5 September 1997Date of latest announcement of this ETS (doa):31 December 1997Date of latest publication of new National Standardor endorsement of this ETS (dop/e):30 June 1998Date of withdrawal of any conflicting National Standard (dow):30 June 1998Endorsement noticeThe text of ITU-T Recommendation Q.2932.1 (1996) was approved by ETSI as an ETS with agreedmodifications 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 300 796-1:1998

Page 3ETS 300 796-1: September 1997clause 1Replace subclause 1.1 by:1.1
ScopeThis first part of ETS 300 796 specifies the functional protocol for the pan-European Broadband IntegratedServices Digital Network (B-ISDN), using local information exchange, for the application to a range ofadditional basic call capabilities and supplementary services at the TB reference point or coincident SBand TB reference point (as defined in ITU-T Recommendation I.413 [1]) by means of the DigitalSubscriber Signalling System No. two (DSS2) protocol.The functional protocol is based on the use of the Facility information element.To be functional this protocol requires knowledge of the additional basic call capabilities andsupplementary services supported by the user equipment. This facilitates user equipment operationwithout human intervention by defining the semantics for the protocol elements which user equipment canprocess on its own.The procedures specified in this ETS can be used for:-
activation and deactivation;-
invocation and operation;-
interrogation;-
status request; and-
status notification,of additional basic call capabilities and supplementary services in association with existing calls or outsideany existing call.The application of this ETS to individual additional basic call capabilities and supplementary services isoutside the scope of this ETS and is defined in those ETSs which specify the individual capabilities.Further ETSs cover the capabilities for non-local addressing within the generic functional protocol.All conformance to this ETS is based on the external behaviour at the interface at the TB or coincident SBand TB reference point, i.e. on the generation of the correct message structure and in the propersequence as specified in this recommendation.Further part(s) of this ETS specify the method of testing required to identify conformance to this ETS.This ETS is applicable to equipment, supporting additional basic call capabilities and supplementaryservices using the functional protocol, to be attached at either side of a TB reference point or coincidentSB and TB reference point when used as an access to the public 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.SIST ETS 300 796-1:1998

Page 4ETS 300 796-1: September 1997subclause 1.2Insert the following references at the end of subclause 1.2:[18]
ETS 300 437-1: "Broadband Integrated Services Digital Network (B-ISDN);Signalling ATM Adaptation Layer (SAAL); Service Specific Co-ordinationFunction (SSCF) for support of signalling at the User-Network Interface (UNI);Part 1: Specification of SSCF at UNI [ITU-T Recommendation Q.2130 (1995),modified]".[19]
ETS 300 443-1: "Broadband Integrated Services Digital Network (B-ISDN);Digital Subscriber Signalling System No. two (DSS2) protocol; B-ISDN user-network interface layer 3 specification for basic call/bearer control; Part 1:Protocol specification [ITU-T Recommendatio
...

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Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling
System No. two (DSS2) protocol; Generic functional protocol; Core aspects; Part 1:
Protocol specification [ITU-T Recommendation Q.2932.1 (1996), modified]
Ta slovenski standard je istoveten z: ETS 300 796-1 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 300 796-1
TELECOMMUNICATION September 1997
STANDARD
Source: SPS Reference: DE/SPS-05101-1
ICS: 33.020
Key words: B-ISDN, broadband, DSS2, functional, generic, ISDN, layer 3, protocol
Broadband Integrated Services Digital Network (B-ISDN);
Digital Subscriber Signalling System No. two (DSS2) protocol;
Generic functional protocol;
Core aspects;
Part 1: Protocol specification
[ITU-T Recommendation Q.2932.1 (1996), 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
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: [e-mail]
Tel.: [phone] - Fax: [phone]
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 1997. All rights reserved.

Page 2
ETS 300 796-1: September 1997
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 Integrated Services Digital Network (ISDN) Digital
Subscriber Signalling System No. two (DSS2) core aspects of the generic functional protocol as described
below:
Part 1: "Protocol specification [ITU-T Recommendation Q.2932.1 (1996), modified]";
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 under
study.
Transposition dates
Date of adoption: 5 September 1997
Date of latest announcement of this ETS (doa): 31 December 1997
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 30 June 1998
Date of withdrawal of any conflicting National Standard (dow): 30 June 1998
Endorsement notice
The text of ITU-T Recommendation Q.2932.1 (1996) 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 Editing and Committee Support Dept." at the address shown on the title page.

Page 3
ETS 300 796-1: September 1997
clause 1
Replace subclause 1.1 by:
1.1      Scope
This first part of ETS 300 796 specifies the functional protocol for the pan-European Broadband Integrated
Services Digital Network (B-ISDN), using local information exchange, for the application to a range of
additional basic call capabilities and supplementary services at the T reference point or coincident S
B B
and T reference point (as defined in ITU-T Recommendation I.413 [1]) by means of the Digital
B
Subscriber Signalling System No. two (DSS2) protocol.
The functional protocol is based on the use of the Facility information element.
To be functional this protocol requires knowledge of the additional basic call capabilities and
supplementary services supported by the user equipment. This facilitates user equipment operation
without human intervention by defining the semantics for the protocol elements which user equipment can
process on its own.
The procedures specified in this ETS can be used for:
-     activation and deactivation;
-     invocation and operation;
-     interrogation;
-     status request; and
-     status notification,
of additional basic call capabilities and supplementary services in association with existing calls or outside
any existing call.
The application of this ETS to individual additional basic call capabilities and supplementary services is
outside the scope of this ETS and is defined in those ETSs which specify the individual capabilities.
Further ETSs cover the capabilities for non-local addressing within the generic functional protocol.
All conformance to this ETS is based on the external behaviour at the interface at the T or coincident S
B B
and T reference point, i.e. on the generation of the correct message structure and in the proper
B
sequence as specified in this recommendation.
Further part(s) of this ETS specify the method of testing required to identify conformance to this ETS.
This ETS is applicable to equipment, supporting additional basic call capabilities and supplementary
services using the functional protocol, to be attached at either side of a T reference point or coincident
B
S and T reference point when used as an access to the public ISDN.
B B
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.

Page 4
ETS 300 796-1: September 1997
subclause 1.2
Insert the following references at the end of subclause 1.2:
[18]                  ETS 300 437-1: "Broadband Integrated Services Digital Network (B-ISDN);
Signalling ATM Adaptation Layer (SAAL); Service Specific Co-ordination
Function (SSCF) for support of signalling at the User-Network Interface (UNI);
Part 1: Specification of SSCF at UNI [ITU-T Recommendation Q.2130 (1995),
modified]".
[19]                  ETS 300 443-1: "Broadband Integrated Services Digital Network (B-ISDN);
Digital Subscriber Signalling System No. two (DSS2) protocol; B-ISDN user-
network i
...