SIST ETS 300 166 E1:2003

SLOVENSKI STANDARD
SIST ETS 300 166 E1:2003
01-december-2003
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Transmission and Multiplexing (TM); Physical and electrical characteristics of
hierarchical digital interfaces for equipment using the 2 048 kbit/s - based plesiochronous
or synchronous digital hierarchies
Ta slovenski standard je istoveten z: ETS 300 166 Edition 1
ICS:
33.040.20 Prenosni sistem Transmission systems
35.200 Vmesniška in povezovalna Interface and interconnection
oprema equipment
SIST ETS 300 166 E1:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 166 E1:2003

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SIST ETS 300 166 E1:2003
EUROPEAN ETS 300 166
TELECOMMUNICATION August 1993
STANDARD
Source: ETSI TC-TM Reference: DE/TM-3002
ICS: 33.020, 33.040.40
Transmission, multiplexing, interfaces
Key words:
Transmission and Multiplexing (TM);
Physical and electrical characteristics of hierarchical digital
interfaces for equipment using the 2 048 kbit/s -
based plesiochronous or synchronous digital hierarchies
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 - secretariat@etsi.fr
X.400: Internet:
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 1993. All rights reserved.
New presentation - see History box

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ETS 300 166: August 1993
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 Standards Approval Dept." at the address shown on the title page.

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SIST ETS 300 166 E1:2003
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ETS 300 166:1993
Contents
Foreword .5
1 Scope .7
2 Normative references.7
3 Definitions.7
4 Symbols and abbreviations .7
5 Requirements.8
5.1 Tolerable longitudinal voltage .10
5.2 Output signal balance .10
5.3 Minimum output return loss .10
History.12

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ETS 300 166:1993
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SIST ETS 300 166 E1:2003
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ETS 300 166:1993
Foreword
This European Telecommunication Standard (ETS) has been produced by the Transmission and
MuItiplexing (TM) Technical Committee of the European Telecommunications Standards Institute (ETSI).
This ETS specifies the physical and electrical characteristics of hierarchical interfaces based on CCITT
Recommendation G.703 [2] but it does not intend to preclude the use of interfaces covered in other
standards.
The aim of this ETS is to provide inter-vendor and inter-operator compatibility.
The conformance testing requirements corresponding to the specifications contained in this ETS are to be
specified in a different ETS.
Physical parameters for optical interfaces for the Synchronous Digital Hierarchy (SDH) are to be specified
in a different standard which is under development.

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ETS 300 166:1993
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ETS 300 166:1993
1 Scope
This ETS describes the requirements for the physical and electrical parameters of interfaces based on
CCITT Recommendations G.702 [1], G.703 [2] and G.707 [3] for interconnection of digital network
elements:
- in-station (i.e. for distances below a few hundred metres);
- using metallic (symmetrical or coaxial) pairs;
- at 64, 2 048, 8 448, 34 368 and 139 264 kbit/s hierarchical levels of the Plesiochronous Digital
Hierarchy (PDH) and at the first level of the Synchronous Digital Hierarchy (SDH) (STM-1 at
155 520 kbit/s).
This ETS also describes the requirements for the physical and electrical parameters of the 2 048 kHz
synchronisation interface.
2 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 G.702 (1990): "Digital hierarchy bit rates".
[2] CCITT Recommendation G.703 (1991): "Physical/electrical characteristics of
hierarchical digital interfaces".
[3] CCITT Recommendation G.707 (1991): "Synchronous digital hierarchy bit
rates".
[4] CCITT Recommendation I.431 (1988): "Primary rate user/network interface -
Layer 1 specification".
[5] CCITT Recommendation O.9 (1988): "Measuring arrangements to assess the
degree of unbalance about earth".
[6] CCITT Recommendation G.704 (1991): "Synchronous frame structures used at
primary and secondary hierarchical levels".
3 Definitions
For the purposes of this ETS, there are no terms needing a specific definition.
4 Symbols and abbreviations
For the purposes of this ETS, the following abbr
...