SIST ETS 300 438-1:1997/C1:1998

• Abstract:

  Corrigendum to repair published ITU-T Rec. Q.2140

• Status: Published
• Publication Date: 30-Sep-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-Oct-1998
• Due Date: 01-Oct-1998
• Completion Date: 01-Oct-1998
• Ref Project: ETSI ETS 300 438-1/C1 ed.1 (1996-06) - Broadband Integrated Services Digital Network (B-ISDN); Signalling ATM Adaptation Layer (SAAL); Service Specific Co-ordination Function (SSCF) for support of signalling at the Network Node Interface (NNI); Part 1: Specification of SSCF at NNI [ITU-T Recommendation Q.2140 (1995), modified]

SIST ETS 300 438-1:1997/C1:1998 is a SIST corrigendum to ETS 300 438-1, based on ITU-T Recommendation Q.2140 (1995), for Broadband Integrated Services Digital Network (B-ISDN) signalling over the Signalling ATM Adaptation Layer (SAAL). It corrects the Service Specific Co-ordination Function (SSCF) at the Network Node Interface (NNI), mainly by fixing Table 6/Q.2140. Engineers and implementers use it to apply the published corrections to the original B-ISDN signalling specification.

What does SIST ETS 300 438-1:1997/C1:1998 specify?

SIST ETS 300 438-1:1997/C1:1998 specifies corrections to the published SSCF specification for signalling at the NNI. It is a corrigendum, so its purpose is to amend the original European Telecommunication Standard rather than add new functional content.

The document is organized as a short correction notice with:

• a foreword explaining the reason for the corrigendum,
• an amendments section for Table 6/Q.2140,
• a document history.

The foreword says the corrigendum corrects editorial differences between the officially published ITU-T Recommendation Q.2140 (1995) and ITU-T Study Group 11 Report R 70. In practice, that means readers should apply the listed table corrections to the original recommendation when using the SSCF state machine.

What are the key requirements of SIST ETS 300 438-1:1997/C1:1998?

The corrigendum is centered on Table 6/Q.2140, which is the state transition table for SSCF. It fixes the table headings and one misplaced event so that the published state behavior is consistent across the split pages.

The main corrections in Table 6/Q.2140

• The last row linked to AAL-START.request is deleted from page 23.
  This removes a row that was placed in the wrong continuation of the table.

• The table heading on page 24 is replaced.
  The corrected heading aligns the states Alignment/Outgoing Disconnection Pending, In Service/Data Transfer Ready, Proving/Data Transfer Ready and Aligned Ready/Data Transfer Ready with the right timer context.

• The AAL-START.request event is inserted under the corrected heading on page 24 and is marked Illegal for the listed states.
  In practice, this tells implementers that the event is not accepted in those state conditions.

• The headings on pages 25 to 28 are replaced with the same corrected state grouping.
  This keeps the continuation pages consistent with the intended state machine.

• The corrigendum applies to a table that comprises eight states and is split into nine consecutive parts.
  For users, the practical point is to read the full table as one corrected state machine, not as separate page fragments.

• The relevant SSCF timers shown in the corrected heading are T2 and T3.
  That matters because timer-dependent behavior is part of the state-transition interpretation.

What terms does SIST ETS 300 438-1:1997/C1:1998 define?

• Broadband Integrated Services Digital Network (B-ISDN) - The broadband network environment covered by the standard.
• Signalling ATM Adaptation Layer (SAAL) - The ATM adaptation layer used for signalling transport.
• Service Specific Co-ordination Function (SSCF) - The function that coordinates signalling support at the NNI.
• Network Node Interface (NNI) - The interface between network nodes where the signalling support applies.
• ATM Adaptation Layer (AAL) - The adaptation layer family referenced by the event name AAL-START.request.
• AAL-START.request - A signalling-related event used in the corrected state transition table.
• ITU-T Recommendation Q.2140 - The underlying recommendation that this corrigendum modifies.

Who uses SIST ETS 300 438-1:1997/C1:1998?

This corrigendum is used by telecommunications engineers, protocol implementers, and standards maintenance teams working on B-ISDN and ATM signalling. It is also relevant to quality managers and test engineers who need to verify that an implementation follows the corrected SSCF state-transition behavior at the NNI. Equipment vendors and network operators use it when aligning products or specifications with the published ETS 300 438-1/Q.2140 text.

What changed in SIST ETS 300 438-1:1997/C1:1998 from the previous edition?

SIST ETS 300 438-1:1997/C1:1998 modifies ETS 300 438-1 (1995). The corrigendum states these changes:

• delete the last row associated with AAL-START.request on page 23,
• replace the table heading on page 24 and insert the AAL-START.request row there,
• replace the table heading on pages 25 to 28.

It also says the purpose is to correct editorial differences against ITU-T Recommendation Q.2140 (1995).

Which standards are used with SIST ETS 300 438-1:1997/C1:1998?

• ETS 300 438-1 (1995) - The European Telecommunication Standard that this corrigendum modifies.
• ITU-T Recommendation Q.2140 (1995) - The underlying recommendation whose published text is corrected here.
• ITU-T Study Group 11 Report R 70 - Cited in the foreword as the reference used to identify the editorial differences.

What does the SIST ETS 300 438-1:1997/C1:1998 document contain?

The document contains a short foreword, the correction instructions for Table 6/Q.2140, and a document history. The amendments section names the pages affected and shows how the table heading and the AAL-START.request row are to be corrected. The history records the public enquiry, vote, first edition, and the corrigendum issue.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Broadband Integrated Services Digital Network (B-ISDN); Signalling ATM Adaptation Layer (SAAL); Service Specific Co-ordination Function (SSCF) for support of signalling at the Network Node Interface (NNI); Part 1: Specification of SSCF at NNI [ITU-T Recommendation Q.2140 (1995), modified]33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:ETS 300 438-1/C1 Edition 1SIST ETS 300 438-1:1997/C1:1998en01-oktober-1998SIST ETS 300 438-1:1997/C1:1998SLOVENSKI
STANDARD
This corrigendum modifiesthe European Telecommunication Standard ETS 300 438-1 (1995)Broadband Integrated Services Digital Network (B-ISDN);Signalling ATM Adaptation Layer (SAAL);Service Specific Co-ordination Function (SSCF) forsupport of signalling at the Network Node Interface (NNI);Part 1: Specification of SSCF at NNI[ITU-T Recommendation Q.2140 (1995), modified]CORRIGENDUMETS 300 438-1June 1996Source: ETSI TC-SPSReference: DE/SPS-02022-1-C1ICS:33.080Key words:B-ISDN, ATM, AAL, SSCF, SSCOP, NNIETSIEuropean 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 1996. All rights reserved.SIST ETS 300 438-1:1997/C1:1998

Page 2ETS 300 438-1: November 1995/Corrigendum: June 1996Whilst 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 E
...

SLOVENSKI STANDARD
3SIST ETS 300 438-1:1997/C1:1998
01-DYJXVW-1998
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Broadband Integrated Services Digital Network (B-ISDN); Signalling ATM Adaptation
Layer (SAAL); Service Specific Co-ordination Function (SSCF) for support of signalling at
the Network Node Interface (NNI); Part 1: Specification of SSCF at NNI [ITU-T
Recommendation Q.2140 (1995), modified]
Ta slovenski standard je istoveten z: ETS 300 438-1/C1 Edition 1
ICS:
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
3SIST ETS 300 438-1:1997/C1:1998 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CORRIGENDUM ETS 300 438-1
June 1996
Source: ETSI TC-SPS Reference: DE/SPS-02022-1-C1
ICS: 33.080
B-ISDN, ATM, AAL, SSCF, SSCOP, NNI
Key words:
This corrigendum modifies
the European Telecommunication Standard ETS 300 438-1 (1995)
Broadband Integrated Services Digital Network (B-ISDN);
Signalling ATM Adaptation Layer (SAAL);
Service Specific Co-ordination Function (SSCF) for
support of signalling at the Network Node Interface (NNI);
Part 1: Specification of SSCF at NNI
[ITU-T Recommendation Q.2140 (1995), modified]
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
F-06921 Sophia Antipolis CEDEX - FRANCE
Postal address:
650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Office address:
c=fr, a=atlas, p=etsi, s=secretariat - [e-mail]
X.400: Internet:
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 1996. All rights reserved.

Page 2
ETS 300 438-1: November 1995/Corrigendum: June 1996
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or o
...