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I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n
ITU-T
K.45
TELECOMMUNICATION
STANDARDIZATION SECTOR
OF ITU
(04/2015)
SERIES K: PROTECTION AGAINST INTERFERENCE
Resistibility of telecommunication equipment
installed in the access and trunk networks to
overvoltages and overcurrents
Recommendation ITU-T K.45
Rec. ITU-T K.45 (04/2015) i
Recommendation ITU-T K.45
Resistibility of telecommunication equipment installed in the access
and trunk networks to overvoltages and overcurrents
Summary
Recommendation ITU-T K.45 specifies resistibility requirements and test procedures for
telecommunication equipment installed between telecommunication centres and between a
telecommunication centre and the customer's premises.
Overvoltages or overcurrents covered by this Recommendation include surges due to lightning on or
near the line plant, short-term induction from adjacent a.c. power lines or railway systems, earth
potential rise due to power faults, direct contact between telecommunication lines and power lines and
electrostatic discharges.
Major changes compared with the 2013 version of this Recommendation include:
• adding test requirements for UTP Ethernet
• adding test requirements for STP Ethernet
• adding test requirements for PoE
• adding STP shield testing.
History
Edition
Recommendation
Approval
Study Group
Unique ID
*
1.0
ITU-T K.45
2000-02-25
5
11.1002/1000/4908
2.0
ITU-T K.45
2003-07-29
5
11.1002/1000/6497
3.0
ITU-T K.45
2008-04-13
5
11.1002/1000/9404
4.0
ITU-T K.45
2011-11-13
5
11.1002/1000/11423
5.0
ITU-T K.45
2015-04-22
5
11.1002/1000/12407
____________________
*
To access the Recommendation, type the URL http://handle.itu.int/ in the address field of your web
browser, followed by the Recommendation's unique ID. For example, http://handle.itu.int/11.1002/1000/11
830-en.
ii Rec. ITU-T K.45 (04/2015)
FOREWORD
The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of
telecommunications, information and communication technologies (ICTs). The ITU Telecommunication
Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical,
operating and tariff questions and issuing Recommendations on them with a view to standardizing
telecommunications on a worldwide basis.
The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes
the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics.
The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1.
In some areas of information technology which fall within ITU-T's purview, the necessary standards are
prepared on a collaborative basis with ISO and IEC.
NOTE
In this Recommendation, the expression "Administration" is used for conciseness to indicate both a
telecommunication administration and a recognized operating agency.
Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain
mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the
Recommendation is achieved when all of these mandatory provisions are met. The words "shall" or some other
obligatory language such as "must" and the negative equivalents are used to express requirements. The use of
such words does not suggest that compliance with the Recommendation is required of any party.
INTELLECTUAL PROPERTY RIGHTS
ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve
the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or
applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of
the Recommendation development process.
As of the date of approval of this Recommendation, ITU had not received notice of intellectual property,
protected by patents, which may be required to implement this Recommendation. However, implementers are
cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB
patent database at http://www.itu.int/ITU-T/ipr/.
ITU 2015
All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior
written permission of ITU.
Rec. ITU-T K.45 (04/2015) iii
Table of Contents
Page
1 Scope ............................................................................................................................. 1
2 References ..................................................................................................................... 1
3 Definitions .................................................................................................................... 1
3.1 Terms defined elsewhere ................................................................................ 1
3.2 Terms defined in this Recommendation ......................................................... 1
4 Abbreviations and acronyms ........................................................................................ 1
5 Conventions .................................................................................................................. 2
6 Tests .............................................................................................................................. 2
Bibliography............................................................................................................................. 22
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