ISO/IEC TR 11801-9904:2017

ISO/IEC TR 11801-9904
Edition 1.0 2017-05
TECHNICAL
REPORT
Information technology – Generic cabling for customer premises –
Part 9904: Assessment and mitigation of installed balanced cabling channels
to support 2,5GBASE-T and 5GBASE-T

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ISO/IEC TR 11801-9904
Edition 1.0 2017-05
TECHNICAL
REPORT
Information technology – Generic cabling for customer premises –

Part 9904: Assessment and mitigation of installed balanced cabling channels

to support 2,5GBASE-T and 5GBASE-T

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 35.200 ISBN 978-2-8322-3914-8

– 2 – ISO/IEC TR 11801-9904:2017
© ISO/IEC 2017
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and abbreviations . 7
3.1 Terms and definitions . 7
3.2 Abbreviations . 10
4 Channel transmission performance . 10
4.1 General . 10
4.2 Insertion loss . 11
4.3 Return loss . 11
4.4 NEXT . 12
4.5 PSNEXT . 13
4.6 ACR-F . 14
4.7 PSACR-F . 15
4.8 Propagation delay . 16
4.9 Propagation delay skew . 16
4.10 PSANEXT . 16
4.11 PSAACR-F . 16
4.12 Alien (exogenous) limited signal-to-noise ratio (ALSNR) . 16
5 Use cases . 23
5.1 General . 23
5.2 Assessment procedure . 23
5.3 Risk assessment tables . 24
6 Guidance for existing installations and cabling for new installations . 25
6.1 Certification, measurement and documentation . 25
6.2 Mitigation procedures for existing installations . 25
Annex A (informative) Telecommunications cabling for new installations . 26
Annex B (informative) Mitigation procedure for internal parameters . 27
Annex C (informative) Exogenous cross-talk mitigation procedures. 28
Bibliography . 29

Table 1 – Channel insertion loss . 11
Table 2 – Maximum channel insertion loss . 11
Table 3 – Channel return loss . 11
Table 4 – Minimum channel return loss . 12
Table 5 – Channel NEXT . 12
Table 6 – Minimum channel NEXT . 13
Table 7 – Channel PSNEXT . 13
Table 8 – Minimum channel PSNEXT . 14
Table 9 – Channel ACR-F . 14
Table 10 – Minimum channel ACR-F . 15
Table 11 – Channel PSACR-F . 15
Table 12 – Minimum channel PSACR-F . 16

© ISO/IEC 2017
Table 13 – Frequency range of insertion loss measurements . 17
Table 14 – Template PSD for disturbed channel . 18
Table 15 – PBO for 2,5GBASE-T . 18
Table 16 – PBO for 5GBASE-T . 19
Table 17 – Template PSD for disturbing channel. 20
Table 18 – PBO for 2,5GBASE-T . 21
Table 19 – PBO for 5GBASE-T . 21
Table 20 – PBO for 10GBASE-T . 21
Table 21 – Values of add_noise noise term . 22
Table 22 – Calculated permutations . 23
Table 23 – ALSNR risk matrix for Class D . 24
Table 24 – ALSNR risk matrix for Class E . 24
Table 25 – ALSNR risk matrix for Class E . 25
A
– 4 – ISO/IEC TR 11801-9904:2017
© ISO/IEC 2017
INFORMATION TECHNOLOGY –
GENERIC CABLING FOR CUSTOMER PREMISES –

Part 9904: Assessment and mitigation of installed balanced cabling
channels to support 2,5GBASE-T and 5GBASE-T

FOREWORD
1) ISO (International Organization for Standardization) and IEC (International Electrotechnical Commission) form
the specialized system for worldwide standardization. National bodies that are members of ISO or IEC
participate in the development of International Standards. Their preparation is entrusted to technical
committees; any ISO and IEC member body interested in the subject dealt with may participate in this
preparatory work. International governmental and non-governmental organizations liaising with ISO and IEC
also participate in this preparation.
2) In the field of information technology, ISO and IEC have established a joint technical committee,
ISO/IEC JTC 1. Draft International Standards adopted by the joint technical committee are circulated to
national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the
national bodies casting a vote.
3) The formal decisions or agreements of IEC and ISO on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested IEC and ISO member bodies.
4) IEC, ISO and ISO/IEC publications have the form of recommendations for international use and are accepted
by IEC and ISO member bodies in that sense. While all reasonable efforts are made to ensure that the
technical content of IEC, ISO and ISO/IEC publications is accurate, IEC or ISO cannot be held responsible for
the way in which they are used or for any misinterpretation by any end user.
5) In order to promote international uniformity, IEC and ISO member bodies undertake to apply IEC, ISO and
ISO/IEC publications transparently to the maximum extent possible in their national and regional publications.
Any divergence between any ISO/IEC publication and the corresponding national or regional publication
should be clearly indicated in the latter.
6) ISO and IEC provide no marking procedure to indicate their approval and cannot be rendered responsible for
any equipment declared to be in conformity with an ISO/IEC publication.
7) All users should ensure that they have the latest edition of this publication.
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9) Attention is drawn to the normative references cited in this publication. Use of the referenced publications is
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10) Attention is drawn to the possibility that some of the elements of this Technical Report may be the subject of
patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
The main task of the joint technical committee is to prepare International Standards. However,
the joint technical committee may propose the publication of a Technical Report when it has
collected data of a different kind from that which is normally published as an International
Standard, for example "state of the art".
ISO/IEC TR 11801-9904, which is a Technical Report, has been prepared by
subcommittee 25: Interconnection of information technology equipment, of ISO/IEC joint
technical committee 1: Information technology.
The list of all currently available parts of the ISO/IEC 11801 series, under the general title
Information technology – Generic cabling for customer premises, can be found on the IEC
web site.
ISO/IE
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