ISO/IEC TR 11801-9907:2019

ISO/IEC TR 11801-9907
Edition 1.0 2019-07
TECHNICAL
REPORT

Information technology – Generic cabling for customer premises –
Part 9907: Specifications for direct attach cabling


ISO/IEC TR 11801-9907:2019-07(en)

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ISO/IEC TR 11801-9907


Edition 1.0 2019-07




TECHNICAL



REPORT



















Information technology – Generic cabling for customer premises –

Part 9907: Specifications for direct attach cabling



























INTERNATIONAL

ELECTROTECHNICAL

COMMISSION






ICS 35.200 ISBN 978-2-8322-7195-7




  Warning! Make sure that you obtained this publication from an authorized distributor.

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– 2 – ISO/IEC TR 11801-9907 © ISO/IEC 2019
CONTENTS
FOREWORD . 4
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions, abbreviated terms and symbols . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms . 7
3.3 Symbols . 7
4 Specifications . 7
5 Direct attach cabling configuration . 7
6 Performance specifications . 8
6.1 General . 8
6.2 Return loss limits . 8
6.3 Insertion loss limits . 8
6.4 NEXT limits . 8
6.5 PS NEXT limits . 8
6.6 ACR-N limits . 8
6.7 PS ACR-N limits . 8
6.8 ACR-F limits . 8
6.9 PS ACR-F limits . 8
6.10 TCL limits . 8
6.11 ELTCTL limits . 8
6.12 Coupling attenuation . 9
6.13 Alien crosstalk . 9
6.14 Direct current loop resistance . 9
6.15 Direct current resistance unbalance within a pair . 9
6.16 Propagation delay . 9
6.17 Delay skew . 9
7 Direct attach cabling performance . 9
7.1 General . 9
7.2 Reference performance testing . 9
7.3 Installation performance testing . 10
7.4 Installation performance testing of direct attach cabling . 10
8 Testing of direct attach cabling . 12
Annex A (informative) Short reach Class I direct attach channel transmission
performance . 13
A.1 General . 13
A.2 Short reach Class I direct attach cabling return loss . 13
A.3 Short reach Class I direct attach cabling insertion loss . 13
A.4 Short reach Class I direct attach cabling NEXT . 13
A.5 Short reach Class I direct attach cabling PS NEXT . 14
A.6 Short reach Class I direct attach cabling ACR-F . 14
A.7 Short reach Class I direct attach cabling PS ACR-F . 15
A.8 Short reach Class I direct attach cabling propagation delay . 15
A.9 Short reach Class I direct attach cabling delay skew . 15

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ISO/IEC TR 11801-9907 © ISO/IEC 2019 – 3 –
A.10 Short reach Class I direct attach cabling PS ANEXT . 15
A.11 Short reach Class I direct attach cabling PS AACR-F . 16
Bibliography . 17

Figure 1 – Direct attach cabling . 7

Table 1 – Test regime for reference performance and installation performance – Direct
attach cabling of Classes D, E, E , F, F , I, II . 11
A A
Table A.1 – Short reach Class I direct attach cabling return loss . 13
Table A.2 – Short reach Class I direct attach cabling insertion loss . 13
Table A.3 – Short reach Class I direct attach cabling NEXT . 14
Table A.4 – Short reach Class I direct attach cabling PS NEXT . 14
Table A.5 – Short reach Class I direct attach cabling ACR-F . 14
Table A.6 – Short reach Class I direct attach cabling PS ACR-F . 15
Table A.7 – Short reach Class I direct attach cabling propagation delay . 15
Table A.8 – Short reach Class I direct attach cabling PS NEXT . 16
Table A.9 – Short reach Class I direct attach cabling PS AACR-F . 16

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– 4 – ISO/IEC TR 11801-9907 © ISO/IEC 2019
INFORMATION TECHNOLOGY –
GENERIC CABLING FOR CUSTOMER PREMISES –

Part 9907: Specifications for direct attach cabling

FOREWORD
1) ISO (the International Organization for Standardization) and IEC (the 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 through technical committees established by the
respective organization to deal with particular fields of technical activity. ISO and IEC technical committees
collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in
liaison with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have
established a joint technical committee, ISO/IEC JTC 1.
2) 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 National Committees and ISO member bodies.
3) IEC, ISO and ISO/IEC publications have the form of recommendations for international use and are accepted
by IEC National Committees 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.
4) In order to promote international uniformity, IEC National Committees 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 or ISO/IEC publication and the corresponding
national or regional publication should be clearly indicated in the latter.
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patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
The main task of IEC and ISO technical committees is to prepare International Standards.
However, a 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 11801-9907, which is a Technical Report, was 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
website.
The text of this Technical Report is based on the following documents:
DTR Report on voting
JTC1-SC25/2841/DTR JTC1-SC25/2863/RVDTR
Full information on the voting for the approval of this Technical Report can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A bilingual version of this document may be issued at a later date.

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ISO/IEC TR 11801-9907 © ISO/IEC 2019 – 5 –
INTRODUCTION
This document provides definitions and examples of direct attach cabling. It provides
performance specifications for Classes D, E, E , F, F , I and II direct attach cabling that can
A A
also be used to verify terminating connectors. Performance verification for direct attach
cabling will be specified in the second edition of ISO/IEC 14763-4.

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– 6 – ISO/IEC TR 11801-9907 © ISO/IEC 2019
INFORMATION TECHNOLOGY –
GENERIC CABLING FOR CUSTOMER PREMISES –

Part 9907: Specifications for direct attach cabling



1 Scope
This part of ISO/IEC 11801, which is a Technical Report, provides definitions for, and
examples of, direct attach cabling configurations.
This document provides performance specifications for Classes D, E, E , F, F , I and II direct
A A
attach cabling by reference to ISO/IEC 11801-1.
Informative limits for Class I direct attach cabling to support 5 m short reach mode application
according to ISO/IEC/IEEE 8802-3:2017/AMD3, i.e. 25GBASE-T and 40GBASE-T, are
provided in Annex A.
Test methods will be provided in the second edition of ISO/IEC 14763-4.
NOTE ISO/IEC 14763-4 is the test method for End to End (E2E) link. It can be also used for direct attach cabling.
Test methods for Classes E , F, F , I, II will be provided in the second edition of ISO/IEC 14763-4.
A A
Direct attach cabling connects two pieces of equipment, it has connectors at each end, and no
intermediate connecting hardware.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements of this document. For dated references, only the edition
cited applies. For undated references, the latest edition of the referenced document (including
any amendments) applies.
ISO/IEC 11801-1, Information
...