SIST ETS 300 660:1998

SLOVENSKI STANDARD
SIST ETS 300 660:1998
01-september-1998
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Integrated Services Digital Network (ISDN); Synchronization and Co-ordination Function
(SCF) for the provision of the OSI Connection-mode Network Service (OSI CONS) in an
ISDN environment; Specification of SCF [ITU-T Recommendation Q.923 (1995),
modified]
Ta slovenski standard je istoveten z: ETS 300 660 Edition 1
ICS:
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
35.100.30 Omrežni sloj Network layer
SIST ETS 300 660:1998 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 660:1998

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SIST ETS 300 660:1998
EUROPEAN ETS 300 660
TELECOMMUNICATION August 1996
STANDARD
Source: ETSI TC-SPS Reference: DE/SPS-05099
ICS: 33.080, 35.100.30
Key words: ISDN, B-ISDN, OSI, network, service
Integrated Services Digital Network (ISDN);
Synchronization and Co-ordination Function (SCF) for the
provision of the OSI Connection-mode Network Service
(OSI CONS) in an ISDN environment;
Specification of SCF
[ITU-T Recommendation Q.923 (1995), modified]
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
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Tel.: +33 92 94 42 00 - Fax: +33 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 1996. All rights reserved.

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SIST ETS 300 660:1998
Page 2
ETS 300 660: August 1996
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 covers the Synchronization and Co-ordination Function which provides for the OSI
Connection-mode Network Service (OSI CONS) according to CCITT Recommendation X.213 [2] in a
Control- and User-plane, or Management- and User-plane, as appropriate, ISDN environment. The SCF
specified in this ETS is to be implemented in end systems conforming to OSI principles for connection to
the pan-European Narrowband or Broadband Integrated Services Digital Network (N-ISDN/B-ISDN) as
provided by European Public Telecommunications Operators.
Since the function specified in this ETS only co-ordinates other protocol entities in an ISDN User- and
Control-plane ISDN arrangement, or User- and Management-plane ISDN arrangement, as appropriate, it
is not a self-contained protocol machine which implements Protocol Data Units (PDUs) and is accessible
from outside of a system. Therefore, standardization of:
- Protocol Implementation Conformance Statement (PICS) proforma;
- Test Suite Structure (TSS) and Test Purposes (TP);
- Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT)
proforma,
is not appropriate.
Transposition dates
Date of adoption of this ETS: 16 August 1996
Date of latest announcement of this ETS (doa): 30 November 1996
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 31 May 1997
Date of withdrawal of any conflicting National Standard (dow): 31 May 1997
Endorsement notice
The text of ITU-T Recommendation Q.923 (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 Editing and Committee Support Dept." at the address shown on the title page.

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SIST ETS 300 660:1998
Page 3
ETS 300 660: August 1996
Page 1
Add the following three clauses (Scope, Normative references, Definitions) at the start of the text:
Scope
This European Telecommunication Standard (ETS) specifies the Synchronization and Co-ordination
Function (SCF) which provides for the OSI Connection-mode Network Service according to CCITT
Recommendation X.213 [2] in a Control- and User-plane, or Management- and User-plane, as
appropriate, ISDN environment. The SCF specified in this ETS is to be implemented in endsystems
conforming to OSI principles for connection to the pan-European Narrowband or Broadband Integrated
Services Digital Network (N-ISDN/B-ISDN) as provided by European Public Telecommunications
Operators.
The SCF is identified in the protocol reference model according to CCITT Recommendation I.320 [1].
The SCF for the provision of the OSI Connection-mode Network Service is specified in terms of the
interrelationship between Network primitives at its upper and lower boundaries. The SCF performs the
synchronization between C-plane, or M-plane if appropriate, and U-plane on a per network connection
basis and is not concerned with any functionality which is required, if multiplexing within U-plane
underlying layers is used.
This ETS is applicable to an ISDN customer access using an ISDN access signalling system such as the
Digital Subscriber Signalling System No. one (DSS1) protocol within the C-plane for the provision of a
Switched Virtual Circuit (SVC), and Permanent Virtual Circuit (PVC) arrangements. It does not require a
particular protocol within the U-plane, but rather relies on Service Data Units (SDUs) to be exchanged
between the SCF as service user and the U-plane as service provider.
This ETS is applicable to equipment conforming to OSI principles to be attached at the user side of
N-ISDN, or B-ISDN, as appropriate, User-Network Interface (UNI).
Normative references
This ETS incorporates by dated or 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.
[1] CCITT Recommendation I.320 (1988): "ISDN protocol reference
...