ETSI ETS 300 288/A1 ed.1 (1995-06)

SLOVENSKI STANDARD
SIST ETS 300 288:1999/A1:1999
01-november-1999
Poslovne telekomunikacije (BTC) - Digitalni zakupljeni vodi za prenosno hitrost 64
kbit/s brez omejitev za prenašane signale in z ohranjanjem oktetov (D64U) -
Omrežni vmesnik
Business TeleCommunications (BTC); 64 kbit/s digital unrestricted leased line with octet
integrity (D64U); Network interface presentation
Ta slovenski standard je istoveten z: ETSI ETS 300 288/A1 ed.1 (1995-06)
ICS:
33.040.50 Vodi, zveze in tokokrogi Lines, connections and
circuits
SIST ETS 300 288:1999/A1:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 288:1999/A1:1999

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SIST ETS 300 288:1999/A1:1999
ETS 300 288
AMENDMENT A1
November 1995
Source: ETSI TC-BTC Reference: RE/BTC-02063
ICS: 33.120
Key words: ONP, leased line
This amendment A1 modifies
the European Telecommunication Standard ETS 300 288 (1994)
Business TeleCommunications (BTC);
64 kbit/s digital unrestricted leased line
with octet integrity (D64U);
Network interface presentation
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
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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 1995. All rights reserved.

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SIST ETS 300 288:1999/A1:1999
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ETS 300 288 January 1994/A1: November 1995
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 300 288:1999/A1:1999
Page 3
ETS 300 288 January 1994/A1: November 1995
Foreword
This amendment to ETS 300 288 (1994) has been produced by the Business TeleCommunications (BTC)
Technical Committee of the European Telecommunications Standards Institute (ETSI).
This amendment changes ETS 300 288 (1994) as described below:
The connector type specified, conforming to ISO/IEC 10173 (1991), cannot be manufactured. Since a
standardized connector is not available, the leased line is required to provide an interface suitable for
hardwired connection. However, an alternative means of connection, using a socket, may be provided.
Transposition dates
Date of adoption of this amendment: 31 October 1995
Date of latest announcement of this amendment (doa): 31 January 1996
Date of latest publication or endorsement of this amendment (dop/e): 31 July 1996
Date of withdrawal of any conflicting National Standard (dow): 31 July 1996

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SIST ETS 300 288:1999/A1:1999
Page 4
ETS 300 288 January 1994/A1: November 1995
Amendments
Page 7, amendment to clause 2
Delete reference [7].
Page 9, amendment to subclause 5.1
Replace subclause 5.1 and its subclauses with subclauses 5.1, 5.1.1, 5.1.2 and 5.1.3 as given below:
"5.1 Physical characteristics
The connection arrangements provided by the leased line interface shall be suitable for hardwired
connection (see subclause 5.1.1). However, with the agreement of the user, an alternative means of
connection, using a socket, may be provided (see subclause 5.1.2).
The transmit pair is the output from the network interface. The receive pair is the input to the network
interface, as shown in figure 1. Where the terms "output" and "input" are used without qualification in this
ETS, they refer to the network interface.
OUTPUT INPUT
RX
TX
TERMINAL
NETWORK
EQUIPMENT
INTERFACE
INTERFACE
RX TX
OUTPUT
INPUT
Figure 1
The use on the terminal equipment side of the interface of shielded cables may be necessary to meet
radiation and immunity requirements defined in Electro-Magnetic Compatibility (EMC) standards.
Therefore the NTP is required to provide a point for connection of the shield (see subclause 5.1.3).
5.1.1 Hardwired connection
Requirement: Where t
...