IEC 61935-2:2022
(Main)Specification for the testing of balanced and coaxial information technology cabling - Part 2: Cords as specified in ISO/IEC 11801-1 and related standards
Specification for the testing of balanced and coaxial information technology cabling - Part 2: Cords as specified in ISO/IEC 11801-1 and related standards
IEC 61935-2:2021 specifies test methods for balanced and coaxial cords, which are used as equipment cords, patch cords, and CP cords, within cabling systems, in accordance with ISO/IEC 11801-1. The test methods and associated requirements are provided to demonstrate performance and reliability and to ensure compatibility of these balanced and coaxial cords during their operational lifetime. This document may also be used for providing test methodology for assessing the performance of other cords.
This fourth edition cancels and replaces the third edition published in 2010. This edition includes the following significant technical changes with respect to the previous edition:
- inclusion of cords up to category 8.1 and category 8.2, as defined in ISO/IEC 11801-1.
Spécification relative aux essais des câblages symétriques et coaxiaux des technologies de l'information - Partie 2: Cordons tels que spécifiés dans l’ISO/IEC 11801-1 et normes associées
IEC 61935-2:2022 spécifie les méthodes d’essai applicables aux cordons à paires symétriques et aux cordons coaxiaux utilisés comme cordons d’équipements, cordons de brassage et cordons CP dans des systèmes de câblage, conformément à l’ISO/IEC 11801‑1. Les méthodes d’essai et leurs exigences associées permettent de démontrer les performances et la fiabilité et de garantir la compatibilité de ces cordons à paires symétriques et cordons coaxiaux au cours de leur durée de vie opérationnelle. Le présent document peut également être utilisé en vue de fournir une méthodologie d'essai pour l'évaluation des performances d'autres cordons.
Cette quatrième édition annule et remplace la troisième édition parue en 2010. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
a. inclusion des cordons des catégories 8.1 et 8.2 tels qu'ils sont définis dans l’ISO/IEC 11801‑1.
General Information
Relations
Standards Content (Sample)
IEC 61935-2 ®
Edition 4.0 2022-02
COMMENTED VERSION
INTERNATIONAL
STANDARD
colour
inside
Specification for the testing of balanced and coaxial information technology
cabling –
Part 2: Cords as specified in ISO/IEC 11801-1 and related standards
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
IEC Secretariat Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always
committee, …). It also gives information on projects, replaced have access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and
and French, with equivalent terms in 19 additional languages.
once a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc
If you wish to give us your feedback on this publication or
need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
IEC 61935-2 ®
Edition 4.0 2022-02
COMMENTED VERSION
INTERNATIONAL
STANDARD
colour
inside
Specification for the testing of balanced and coaxial information technology
cabling –
Part 2: Cords as specified in ISO/IEC 11801-1 and related standards
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.040.20; 33.120.20 ISBN 978-2-8322-5010-5
– 2 – IEC 61935‑2:2022 CMV © IEC 2022
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 11
4 General Requirements and test configuration . 11
4.1 Cable and connector design .
4.2 Balanced cord, cable and connector tests .
4.3 Test configuration and equipment .
4.4 Balanced cord tests requirements .
4.1 Cord components: cable and connector . 14
4.2 Cord tests . 14
4.2.1 General . 14
4.2.2 Acceptance tests . 15
4.2.3 Periodic tests . 15
4.3 Cord test procedure . 16
4.3.1 General . 16
4.3.2 Electrical transmission parameters, test fixtures and reference test
heads . 16
5 Acceptance tests and additional optional tests . 16
5.1 Visual inspection (balanced and coaxial cords) . 16
5.2 Wire map (balanced cords) . 17
5.3 Propagation delay .
5.4 Delay skew .
5.5 Insertion loss .
5.6 Return loss .
5.7 Near end crosstalk (NEXT) .
5.8 Assumptions used in the development of cord requirements .
5.3 Return loss (balanced and coaxial cords) . 23
5.4 Pair-to-pair NEXT and PS NEXT (balanced cords) . 23
5.5 Insertion loss and attenuation (balanced and coaxial cords) . 23
5.6 Pair-to-pair ACRF and PS ACRF (balanced cords) . 23
5.7 Alien crosstalk, PS ANEXT and PS AACRF, (balanced cords) . 23
5.8 Unbalance attenuation, TCL and EL TCTL, (balanced cords) . 23
5.9 Coupling attenuation (screened balanced cords) . 23
5.10 Screening attenuation and transfer impedance (screened balanced and
coaxial cords) . 23
5.11 Propagation delay (balanced and coaxial cords) . 23
5.12 Delay skew (balanced cords) . 24
5.13 DC resistance (balanced and coaxial cords). 24
5.14 DC resistance unbalance within pairs (balanced cords) . 24
5.15 DC resistance unbalance between pairs (balanced cords) . 24
6 Balanced cord test procedure – Network analyser test configuration .
6 Periodic tests, procedures . 24
6.1 General . 24
6.2 Tensile strength . 24
IEC 61935‑2:2022 CMV © IEC 2022 – 3 –
6.2.1 Object . 24
6.2.2 Procedure . 24
6.2.3 Requirements . 25
6.2.4 Detail specification . 25
6.3 Flexure . 25
6.3.1 Object . 25
6.3.2 Procedure . 26
6.3.3 Requirements . 26
6.3.4 Information to be given in the detail specification . 26
6.4 Bending . 26
6.4.1 Object . 26
6.4.2 Procedures . 27
6.5 Twisting . 27
6.5.1 Object . 27
6.5.2 Procedures . 27
6.5.3 Requirements . 28
6.6 Crushing . 28
6.6.1 Object . 28
6.6.2 Procedure . 28
6.6.3 Requirements . 29
6.6.4 Information to be given in the detail specification . 29
6.7 Dust test . 29
6.7.1 Object . 29
6.7.2 Procedure . 29
6.7.3 Requirements . 30
6.7.4 Information to be given in the detail specification . 30
6.7.5 Test chamber. 30
7.8 Coupling attenuation .
6.8 Climatic sequence. 31
6.8.1 General . 31
6.8.2 Object . 32
6.8.3 Procedure . 32
6.8.4 Requirements . 32
6.8.5 Information to be given in the detail specification . 32
8 Test head requirements .
8.1 General .
8.2 Minimum requirements for all test head designs .
8.3 Additional FEXT requirements for balanced connector compatible test heads .
8.4 Additional return loss requirements for balanced connector compatible test
heads.
8.5 NEXT loss centering requirements for balanced connector compatible test
heads.
.............................................. 35
A.1 General . 35
A.2 Coaxial cord transmission requirements . 35
A.2.1 Coaxial cord return loss . 35
A.2.2 Coaxial cord screening attenuation . 35
A.3 Coaxial cord testing . 36
A.3.1 Cable and connector design . 36
– 4 – IEC 61935‑2:2022 CMV © IEC 2022
A.3.2 Coaxial cord test procedure . 36
A.3.3 Coaxial cords reference test connectors . 36
........................................... 37
B.1 General requirements . 37
B.1.1 General . 37
B.1.2 Cable and connector types . 37
B.1.3 Balanced cord connector backward compatibility . 37
B.2 Balanced cord test configuration . 37
B.2.1 Cable and connector design . 37
B.2.2 Test configuration and equipment . 38
B.2.3 Network analyser test configuration . 39
B.2.4 Balanced cords test head requirements . 39
Bibliography . 42
List of comments . 43
Figure 1 – Test configuration for balanced cord for NEXT and return loss
measurements .
Figure 2 – Correct pairing .
Figure 3 – Incorrect pairing .
Figure 4 – Initial marking of the cable sheath .
Figure 5 – Final visual inspection .
Figure 1 – Fixture for balanced cord flexure test . 26
Figure 2 – Bending test: assembly in U shape. 27
Figure 3 – Twisting test: assembly in U shape . 28
Figure 4 – Fixture for cable crushing test . 29
Figure 5 – Measuring device, dust test chamber . 31
Figure 11 – Centering of NEXT properties of the balanced connector test head .
Figure B.1 – Example NEXT loss measurement circuit . 38
Figure B.2 – Example IEC 60603-7 series 8 pole RJ45 connector type "modular" cord
NEXT loss balunless test configuration . 39
Table 1 – Return loss requirements .
Table 2 – Balanced cord return loss requirements at key frequencies .
Table 3 – Category 5 balanced cord NEXT requirements at key frequencies .
Table 4 – Category 6 balanced cord NEXT requirements at key frequencies .
Table 5 – Category 6 balanced cord NEXT requirements at key frequencies.
A
Table 6 – Category 7 balanced cord NEXT requirements at key frequencies .
Table 7 – Category 7 balanced cord NEXT requirements at key frequencies.
A
Table 8 – Assumptions for cabling components used in the development of NEXT and
return loss requirements .
Table 9 – Coupling attenuation limits .
Table 1 – Test procedure standards for cords . 14
Table B.1 – IEC 60603-7 series 8-pole RJ45 connector types standards and respective
connector test procedures standards . 40
IEC 61935‑2:2022 CMV © IEC 2022 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SPECIFICATION FOR THE TESTING OF BALANCED AND
COAXIAL INFORMATION TECHNOLOGY CABLING –
Part 2: Cords as specified in ISO/IEC 11801-1 and related standards
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC 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.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC 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 undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
This commented version (CMV) of the official standard IEC 61935-2:2022 edition 4.0
allows the user to identify the changes made to the previous IEC 61935-2:2010 edition
3.0. Futhermore, comments from IEC TC 46 experts are provided to explain the reasons
of the most relevant changes.
A vertical bar appears in the margin wherever a change has been made. Additions are in
green text, deletions are in strikethrough red text. Experts' comments are identified by a
blue-background number. Mouse over a number to display a pop-up note with the
comment.
This publication contains the CMV and the official standard. The full list of comments is
available at the end of the CMV.
– 6 – IEC 61935‑2:2022 CMV © IEC 2022
IEC 61935-2 has been prepared by IEC technical committee 46: Cables, wires, waveguides,
R.F. connectors, R.F. and microwave passive components and accessories. It is an
International Standard.
This fourth edition cancels and replaces the third edition published in 2010. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) inclusion of cords up to category 8.1 and category 8.2, as defined in ISO/IEC 11801-1.
The text of this International Standard is based on the following documents:
Draft Report on voting
46/868/FDIS 46/869/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
A list of all parts of the IEC 61935 series, under the general title Specification for the testing of
balanced and coaxial information technology cabling, can be found on the IEC website.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.
IEC 61935‑2:2022 CMV © IEC 2022 – 7 –
INTRODUCTION
Balanced cords are constructed for connecting equipment using free connectors according to
IEC 60603-7 series, IEC 61076-3-104 and IEC 61076-3-110. It is known that connecting
hardware performance is subject to influence by the properties of the free connector termination
and therefore balanced cords should be tested to determine the quality of the assembly.
Moreover, the performance of balanced cords may differ due to the performances of the
involved separate components depending upon the efficiency of the manufacturing procedure.
Manufacturing procedures also impact upon the reliability of these balanced cords. Therefore,
the primary object of this standard is to provide test methods to ensure compatibility of balanced
cords to be used in cabling according to ISO/IEC 11801. Another object is to provide test
methods and associated requirements to demonstrate the performance and reliability of these
balanced cords during their operational lifetime.
The test methods described in this standard may also be used for any balanced cords that
include twisted pairs terminated at each end.
This part of IEC 61935 covers testing of balanced and coaxial cords, for use as equipment
cords, patch cords, and CP cords, as specified in ISO/IEC 11801-1 and related standards.
The test methods described in this document are suitable for any balanced or coaxial cords or
cable assemblies that include connector terminations at each end. 1
Coaxial cords for connecting equipment are constructed using cable conforming to the
IEC 61196-1 series and connectors conforming to the IEC 61169-1 series.
Balanced cords for connecting equipment are constructed using cable conforming to the
IEC 61156-1 series and connectors conforming to the IEC 60603-7 series, IEC 61076-3-104,
IEC 61076-3-110, IEC 61076-2-101, and IEC 61076-2-109.
Therefore, an object of this document is to provide test methods to ensure compatibility of cords
to be used in cabling in accordance with ISO/IEC 11801-1 and to demonstrate their performance
and reliability during their operational lifetime.
– 8 – IEC 61935‑2:2022 CMV © IEC 2022
SPECIFICATION FOR THE TESTING OF BALANCED AND
COAXIAL INFORMATION TECHNOLOGY CABLING –
Part 2: Cords as specified in ISO/IEC 11801-1 and related standards
1 Scope
This International Standard provides methods to ensure compatibility of balanced cords to be
used in cabling according to ISO/IEC 11801 and provides test methods and associated
requirements to demonstrate the performance and reliability of these balanced cords during
their operational lifetime. This International Standard may also be used for providing test
methods for assessing the behaviour of other balanced cords.
This part of IEC 61935 specifies test methods for balanced and coaxial cords, which are used
as equipment cords, patch cords, and CP cords, within cabling systems, in accordance with
ISO/IEC 11801-1. The test methods and associated requirements are provided to demonstrate
performance and reliability and to ensure compatibility of these balanced and coaxial cords
during their operational lifetime. This document may also be used for providing test
methodology for assessing the performance of other cords. 2
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. 3
IEC 60068‑2‑61, Environmental testing – Part 2-61: Test methods – Test Z/AMBABDM: Climatic
sequence
IEC 60512‑26‑100, Connectors for electronic equipment – Tests and measurements –
Part 26-100: Measurement setup, test and reference arrangement and measurements for
connectors according to IEC 60603-7 – Tests 26a to 26g
IEC 60512‑27‑100, Connectors for electronic equipment – Tests and measurements –
Part 27-100: Signal integrity tests up to 500 MHz on 60603-7 series connectors – Tests 27a to
27g
IEC 60512‑28‑100, Connectors for electronic equipment – Tests and measurements –
Part 28-100: Signal integrity tests up to 2 000 MHz – Tests 28a to 28g 4
IEC 60512‑29‑100, Connectors for electronic equipment – Tests and measurements –
Part 29-100: Signal integrity tests up to 500 MHz on M12 style connectors – Tests 29a to 29g
IEC 60603-7 (all parts), Connectors for electronic equipment – Part 7: Detail specifications
IEC 60603-7:2008, Connectors for electronic equipment – Part 7: Detail specification for 8-way,
unshielded, free and fixed connectors
IEC 60603‑7‑1, Connectors for electronic equipment – Part 7-1: Detail specification for 8-way,
shielded, free and fixed connectors
IEC 61935‑2:2022 CMV © IEC 2022 – 9 –
IEC 60603‑7‑2, Connectors for electronic equipment – Part 7-2: Detail specification for 8-way,
unshielded, free and fixed connectors, for data transmissions with frequencies up to 100 MHz
IEC 60603‑7‑3, Connectors for electronic equipment – Part 7-3: Detail specification for 8-way,
shielded, free and fixed connectors, for data transmission with frequencies up to 100 MHz
IEC 60603‑7‑4, Connectors for electronic equipment – Part 7-4: Detail specification for 8-way,
unshielded, free and fixed connectors, for data transmissions with frequencies up to 250 MHz
IEC 60603‑7‑5, Connectors for electronic equipment – Part 7-5: Detail specification for 8-way,
shielded, free and fixed connectors, for data transmissions with frequencies up to 250 MHz
IEC 60603‑7‑7, Connectors for electronic equipment – Part 7-7: Detail specification for 8-way,
shielded, free and fixed connectors for data transmission with frequencies up to 600 MHz
IEC 60603‑7‑41, Connectors for electronic equipment – Part 7-41: Detail specification for
8-way, unshielded, free and fixed connectors, for data transmissions with frequencies up to 500
MHz
IEC 60603-7-51, Connectors for electronic equipment – Part 7-51: Detail specification for 8-
way, shielded, free and fixed connectors, for data transmissions with frequencies up to 500
MHz
IEC 60603‑7‑71, Connectors for electronic equipment – Part 7-71: Detail specification for
8-way, shielded, free and fixed connectors, for data transmission with frequencies up to
1 000 MHz
IEC 60603‑7‑81, Connectors for electronic equipment – Part 7-81: Detail specification for
8-way, shielded, free and fixed connectors, for data transmissions with frequencies up to
2 000 MHz 5
IEC 60603‑7‑82, Connectors for electronic equipment – Part 7-82: Detail specification for
8-way, 12 contacts, shielded, free and fixed connectors, for data transmission with frequencies
up to 2 000 MHz 5
IEC 60966‑1, Radio frequency and coaxial cable assemblies – Part 1: Generic specification –
General requirements and test methods
IEC 61076‑2‑101, Connectors for electronic equipment – Product requirements – Part 2-101:
Circular connectors – Detail specification for M12 connectors with screw-locking
IEC 61076‑2‑109, Connectors for electronic equipment – Product requirements – Part 2-109:
Circular connectors – Detail specification for connectors with M 12 × 1 screw-locking, for data
transmission frequencies up to 500 MHz
IEC 61076‑3‑104, Connectors for electronic equipment – Product requirements – Part 3-104:
Detail specification for 8-way, shielded free and fixed connectors for data transmissions with
frequencies up to 1000 2 000 MHz
IEC 61076‑3‑110, Connectors for electronic equipment – Product requirements – Part 3-110:
Rectangular connectors – Detail specification for shielded, free and fixed connectors for data
transmission with frequencies up to 1000 3 000 MHz
IEC 61156 (all parts), Multicore and symmetrical pair/quad cables for digital communications
– 10 – IEC 61935‑2:2022 CMV © IEC 2022
IEC 61156‑1, Multicore and symmetrical pair/quad cables for digital communications – Part 1:
Generic specification
IEC TR 61156‑1‑2, Multicore and symmetrical pair/quad cables for digital communications –
Part 1-2: Electrical transmission characteristics and test methods of symmetrical pair/quad
cables
IEC 61156‑5, Multicore and symmetrical pair/quad cables for digital communications – Part 5:
Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz – Horizontal
floor wiring – Sectional specification
IEC 61156‑6, Multicore and symmetrical pair/quad cables for digital communications – Part 6:
Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz – Work area
wiring – Sectional specification
IEC 61156‑9, Multicore and symmetrical pair/quad cables for digital communications – Part 9:
Cables for channels with transmission characteristics up to 2 GHz – Sectional specification 6
IEC 61156‑10, Multicore and symmetrical pair/quad cables for digital communications – Part 10:
Cables for cords with transmission characteristics up to 2 GHz – Sectional specification 6
IEC 61169‑1, Radio-frequency connectors – Part 1: Generic specification – General
requirements and measuring methods
IEC 61169‑1 (all parts), Radio-frequency connectors – Part 1
IEC 61169‑2, Radio-frequency connectors – Part 2: Sectional specification – Radio frequency
coaxial connectors of type 9,52
IEC 61169‑24, Radio-frequency connectors – Part 24: Sectional specification – Radio
frequency coaxial connectors with screw coupling, typically for use in 75 Ω cable networks
(type F)
IEC 61196‑1 (all parts), Coaxial communication cables – Part 1
IEC 61935‑1:2009, Specification for the testing of balanced and coaxial information technology
cabling – Part 1: Installed balanced cabling as specified in ISO/IEC 11801-1 and related
standards
IEC 61935‑1‑1, Specification for the testing of balanced and coaxial information technology
cabling – Part 1-1: Additional requirements for the measurement of transverse conversion loss
and equal level transverse conversion transfer loss
IEC 61935‑1‑2, Specification for the testing of balanced and coaxial information technology
cabling – Part 1‑2: Installed balanced cabling as specified in ISO/IEC 11801 – Additional
requirements for measurement of resistance unbalance with field test instrumentation
IEC 62153‑4‑11, Metallic communication cable test methods – Part 4-11: Electromagnetic
compatibility (EMC) – Coupling attenuation or screening attenuation of patch cords, coaxial
cable assemblies, pre-connectorized cables – Absorbing clamp method
IEC 62153‑4‑15, Metallic communication cable test methods – Part 4-15: Electromagnetic
compatibility (EMC) – Test method for measuring transfer impedance and screening attenuation
– or coupling attenuation with triaxial cell
IEC 61935‑2:2022 CMV © IEC 2022 – 11 –
ISO/IEC 11801‑1, Information technology – Generic cabling for customer premises – Part 1:
General requirements
ISO/IEC 14763‑4, Information technology – Implementation and operation of customer
premises cabling – Part 4: Measurement of end-to-end (E2E) links
3 Terms and definitions
For the purposes of this document, the following terms and definitions given in IEC 61935-1
and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
cable assembly
combination of cable(s) and connector(s) with specified performance, used as a single unit
intended to be a part of a cabling link as defined in ISO/IEC 11801-1 (or equivalent)
3.2
consolidation point cord
cabling between the consolidation point to the telecommunications outlet(s)
3.3
cord
cable, cable unit or cable element with a minimum of one termination; a cable assembly as
defined in IEC 61935-1 whatever its targeted use
NOTE In this document, the usage of balanced cord covers, amongst others, work area cord, patch cord and
equipment cord. The terminology “modular plug cord” is an alternative expression.
3.4
equipment cord
cord connecting to equipment
3.5
patch cord
cord specifically used to establish connections on a patch panel
3.6
work area cord
cord specifically connecting to work area equipment
4 General Requirements and test configuration
4.1 Cable and connector design
When compliance with ISO/IEC 11801 is required, the design of the cables and connectors
should conform to the applicable parts of IEC 61156 and IEC 60603-7, IEC 61076-3-110 and
IEC 61076-3-104 respectively.
– 12 – IEC 61935‑2:2022 CMV © IEC 2022
4.2 Balanced cord, cable and connector tests
For balanced cords complying with ISO/IEC 11801, cables and connectors used in cable
assemblies should be assessed separately in accordance with IEC 61156-1 and IEC 60603-7,
IEC 61076-3-104 or IEC 61076-3-110 respectively. These component tests do not need to be
repeated on the balanced cord, but the terminated contact height should be assessed (e.g.
dimension K2 of Table 1 of IEC 60603-7).
For other cords, the cables and connectors shall be assessed separately according to their
respective standard unless there are no component standards. In this case, all tests will be
performed on the cords, including interface tests. The acceptance tests described in this
document shall be performed on a balanced cord on a lot-by-lot basis.
The periodic tests described in this document are type tests that have to be performed according
to the quality system of the manufacturer.
4.3 Test configuration and equipment
The reference measurement procedures that are described in this standard require the use of
a network analyser, coaxial interface cables, r.f. transformers (baluns), twisted pair test leads
and impedance matching terminations. Refer to IEC 61935-1 for requirements of test
equipment, including baluns (see 4.2.6 of IEC 61935-1). The nominal impedance for the test
set-up and the terminations is 100 Ω. The same tests may be used for 120 Ω and 150 Ω cords,
but the measurement methods have not been evaluated for these nominal impedance values.
The test configuration includes termination test heads at each end of the cord. For NEXT and
return loss, the test configuration is as shown in Figure 1. The terminals on the test heads
interface with the test equipment. Refer to IEC 61935-1 for detailed connection diagrams. All
pairs shall be terminated with differential plus common mode terminations per IEC 61935-1.
Resistive type terminations are preferred.
4 5
IEC 1351/10
Key
IEC 61935‑2:2022 CMV © IEC 2022 – 13 –
1 test interface 5 cord under test
2 network analyser (receiver, in –50 Ω) 6 ground plane
3 near end test head 7 far end test head
4 balun
Figure 1 – Test configuration for balanced cord for NEXT and return loss measurements
4.4 Balanced cord tests requirements
The test methods described in this specification characterise balanced cords according to
ISO/IEC 11801. They may be also used for other cords. For certification purposes, the test
schedule refers to these tests.
The cord test requirements include tests that can be performed on each cord or representative
samples produced, and tests that are only performed on representative samples of cords. The
sampling only tests (known as periodic tests) include:
• tensile strength;
• flexure;
• bending/twisting;
• crushing;
• dust test;
• climatic sequence;
• coupling attenuation.
The periodic tests are described in detail in Clause 7.
The acceptance tests that can be performed on each cord include:
• visual inspection;
• wire map;
• return loss;
• pair-to-pair NEXT.
If all components used to assemble the cord are not assured to be compliant to their respective
component standards, the following additional tests should be performed:
• insertion loss (attenuation);
• propagation delay;
• delay skew;
• d.c. resistance;
• d.c. resistance unbalance.
The requirements to be verified on each cord are described in detail in Clause 5.
Balanced cords shall meet the transmission requirements of its designated category and, with
appropriate test heads, the transmission requirements of all lower categories, e.g. a category
7 balanced cord shall meet the:
A
• category 7 requirements when tested with a category 7 test head;
A A
• category 7 requirements when tested with a category 7 test head;
• category 6 requirements when tested with a category 6 test head;
A A
– 14 – IEC 61935‑2:2022 CMV © IEC 2022
• category 6 requirements when tested with a category 6 test head;
• category 5 requirements when tested with a category 5 test head.
4.1 Cord components: cable and connector
The specifications in this document cover cords used within channels in cabling systems in
accordance with ISO/IEC 11801-1, e.g. equipment cords, patch cords, work area cords, and
consolidation point (CP) cords.
The cabling standards specified in ISO/IEC 11801-1 comprise two basic types of electrical
cords, i.e. balanced and coaxial.
Cords shall conform to the requirements given in ISO/IEC 11801-1 and in the blank detail
specifications.
Balanced cord cable components shall conform to the requirements given in IEC 61156-1,
IEC 61156-5, IEC 61156-6, IEC 61156-9, and IEC 61156-10, and in the blank detail
specifications. Balanced cord connector components shall conform to the requirements given
in the IEC 60603-7 series, IEC 61076-3-104, IEC 61076-3-110, IEC 61076-2-101, and
IEC 61076-2-109, and in the blank detail specifications; IEC 60603-7 series 8-pole RJ45
connector types include IEC 60603-7-1, IEC 60603-7-2, IEC 60603-7-3, IEC 60603-7-4,
IEC 60603-7-5, IEC 60603-7-7, IEC 60603-7-41, IEC 60603-7-51, IEC 60603-7-71,
IEC 60603-7-81, and IEC 60603-7-82.
Coaxial cord cable components shall conform to the requirements given in the IEC 61196-1
series, and in the blank detail specifications. Coaxial cord connector components shall conform
to the requirements given in the IEC 61169-1 series, including IEC 61169-2, IEC 61169-24, and
in the blank detail specifications.
The component cables and connectors for cords are specified in ISO/IEC 11801-1 and in the
blank detail specifications.
These test methods and procedures for cords are specified in ISO/IEC 11801-1 and in its
reference ISO/IEC 14763-4, standards for cabling channel conformance and test procedures.
These test procedures for cords conform to the test procedure standards listed in Table 1.
Table 1 – Test procedure standards for cords
Cord type Coaxial cable cords Balanced cable cords
Test procedure IEC 60966-1 IEC 61935-1
4.2 Cord tests
4.2.1 General
Cords shall be
...
IEC 61935-2 ®
Edition 4.0 2022-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Specification for the testing of balanced and coaxial information technology
cabling –
Part 2: Cords as specified in ISO/IEC 11801-1 and related standards
Spécification relative aux essais des câblages symétriques et coaxiaux des
technologies de l’information –
Partie 2: Cordons tels que spécifiés dans l’ISO/IEC 11801-1 et normes associées
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.
IEC Secretariat Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always
committee, …). It also gives information on projects, replaced have access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and
and French, with equivalent terms in 19 additional languages.
once a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc
If you wish to give us your feedback on this publication or
need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.
A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.
Recherche de publications IEC - IEC Products & Services Portal - products.iec.ch
webstore.iec.ch/advsearchform Découvrez notre puissant moteur de recherche et consultez
La recherche avancée permet de trouver des publications IEC gratuitement tous les aperçus des publications. Avec un
en utilisant différents critères (numéro de référence, texte, abonnement, vous aurez toujours accès à un contenu à jour
comité d’études, …). Elle donne aussi des informations sur adapté à vos besoins.
les projets et les publications remplacées ou retirées.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
Le premier dictionnaire d'électrotechnologie en ligne au
Restez informé sur les nouvelles publications IEC. Just
monde, avec plus de 22 300 articles terminologiques en
Published détaille les nouvelles publications parues.
anglais et en français, ainsi que les termes équivalents dans
Disponible en ligne et une fois par mois par email.
19 langues additionnelles. Egalement appelé Vocabulaire
Electrotechnique International (IEV) en ligne.
Service Clients - webstore.iec.ch/csc
Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-nous:
sales@iec.ch.
IEC 61935-2 ®
Edition 4.0 2022-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Specification for the testing of balanced and coaxial information technology
cabling –
Part 2: Cords as specified in ISO/IEC 11801-1 and related standards
Spécification relative aux essais des câblages symétriques et coaxiaux des
technologies de l’information –
Partie 2: Cordons tels que spécifiés dans l’ISO/IEC 11801-1 et normes associées
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.040.20; 33.120.20 ISBN 978-2-8322-1069-0
– 2 – IEC 61935‑2:2022 © IEC 2022
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 11
4 Requirements . 11
4.1 Cord components: cable and connector . 11
4.2 Cord tests . 12
4.2.1 General . 12
4.2.2 Acceptance tests . 13
4.2.3 Periodic tests . 13
4.3 Cord test procedure . 13
4.3.1 General . 13
4.3.2 Electrical transmission parameters, test fixtures and reference test
heads . 14
5 Acceptance tests and additional optional tests . 14
5.1 Visual inspection (balanced and coaxial cords) . 14
5.2 Wire map (balanced cords) . 14
5.3 Return loss (balanced and coaxial cords) . 15
5.4 Pair-to-pair NEXT and PS NEXT (balanced cords) . 15
5.5 Insertion loss and attenuation (balanced and coaxial cords) . 15
5.6 Pair-to-pair ACRF and PS ACRF (balanced cords) . 15
5.7 Alien crosstalk, PS ANEXT and PS AACRF, (balanced cords) . 15
5.8 Unbalance attenuation, TCL and EL TCTL, (balanced cords) . 15
5.9 Coupling attenuation (screened balanced cords) . 15
5.10 Screening attenuation and transfer impedance (screened balanced and
coaxial cords) . 15
5.11 Propagation delay (balanced and coaxial cords) . 16
5.12 Delay skew (balanced cords) . 16
5.13 DC resistance (balanced and coaxial cords). 16
5.14 DC resistance unbalance within pairs (balanced cords) . 16
5.15 DC resistance unbalance between pairs (balanced cords) . 16
6 Periodic tests, procedures . 16
6.1 General . 16
6.2 Tensile strength . 16
6.2.1 Object . 16
6.2.2 Procedure . 16
6.2.3 Requirements . 17
6.2.4 Detail specification . 17
6.3 Flexure . 17
6.3.1 Object . 17
6.3.2 Procedure . 17
6.3.3 Requirements . 18
6.3.4 Information to be given in the detail specification . 18
6.4 Bending . 18
6.4.1 Object . 18
IEC 61935‑2:2022 © IEC 2022 – 3 –
6.4.2 Procedures . 18
6.5 Twisting . 19
6.5.1 Object . 19
6.5.2 Procedures . 19
6.5.3 Requirements . 20
6.6 Crushing . 20
6.6.1 Object . 20
6.6.2 Procedure . 20
6.6.3 Requirements . 21
6.6.4 Information to be given in the detail specification . 21
6.7 Dust test . 21
6.7.1 Object . 21
6.7.2 Procedure . 22
6.7.3 Requirements . 22
6.7.4 Information to be given in the detail specification . 22
6.7.5 Test chamber. 22
6.8 Climatic sequence. 23
6.8.1 General . 23
6.8.2 Object . 23
6.8.3 Procedure . 24
6.8.4 Requirements . 24
6.8.5 Information to be given in the detail specification . 24
Annex A (normative) Coaxial cord transmission requirements . 25
A.1 General . 25
A.2 Coaxial cord transmission requirements . 25
A.2.1 Coaxial cord return loss . 25
A.2.2 Coaxial cord screening attenuation . 25
A.3 Coaxial cord testing . 26
A.3.1 Cable and connector design . 26
A.3.2 Coaxial cord test procedure . 26
A.3.3 Coaxial cords reference test connectors . 26
Annex B (normative) Balanced cord transmission requirements . 27
B.1 General requirements . 27
B.1.1 General . 27
B.1.2 Cable and connector types . 27
B.1.3 Balanced cord connector backward compatibility . 27
B.2 Balanced cord test configuration . 27
B.2.1 Cable and connector design . 27
B.2.2 Test configuration and equipment . 28
B.2.3 Network analyser test configuration . 29
B.2.4 Balanced cords test head requirements . 29
Bibliography . 32
Figure 1 – Fixture for cord flexure test . 18
Figure 2 – Bending test: assembly in U shape. 19
Figure 3 – Twisting test: assembly in U shape . 20
Figure 4 – Fixture for cable crushing test . 21
Figure 5 – Measuring device, dust test chamber . 23
– 4 – IEC 61935‑2:2022 © IEC 2022
Figure B.1 – Example NEXT loss measurement circuit . 28
Figure B.2 – Example IEC 60603-7 series 8 pole RJ45 connector type "modular" cord
NEXT loss balunless test configuration . 29
Table 1 – Test procedure standards for cords . 12
Table B.1 – IEC 60603-7 series 8-pole RJ45 connector types standards and respective
connector test procedures standards . 30
IEC 61935‑2:2022 © IEC 2022 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SPECIFICATION FOR THE TESTING OF BALANCED AND
COAXIAL INFORMATION TECHNOLOGY CABLING –
Part 2: Cords as specified in ISO/IEC 11801-1 and related standards
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC 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.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC 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 undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 61935-2 has been prepared by IEC technical committee 46: Cables, wires, waveguides,
R.F. connectors, R.F. and microwave passive components and accessories. It is an
International Standard.
This fourth edition cancels and replaces the third edition published in 2010. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) inclusion of cords up to category 8.1 and category 8.2, as defined in ISO/IEC 11801-1.
– 6 – IEC 61935‑2:2022 © IEC 2022
The text of this International Standard is based on the following documents:
Draft Report on voting
46/868/FDIS 46/869/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
A list of all parts of the IEC 61935 series, under the general title Specification for the testing of
balanced and coaxial information technology cabling, can be found on the IEC website.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.
IEC 61935‑2:2022 © IEC 2022 – 7 –
INTRODUCTION
This part of IEC 61935 covers testing of balanced and coaxial cords, for use as equipment
cords, patch cords, and CP cords, as specified in ISO/IEC 11801-1 and related standards.
The test methods described in this document are suitable for any balanced or coaxial cords or
cable assemblies that include connector terminations at each end.
Coaxial cords for connecting equipment are constructed using cable conforming to the
IEC 61196-1 series and connectors conforming to the IEC 61169-1 series.
Balanced cords for connecting equipment are constructed using cable conforming to the
IEC 61156-1 series and connectors conforming to the IEC 60603-7 series, IEC 61076-3-104,
IEC 61076-3-110, IEC 61076-2-101, and IEC 61076-2-109.
Therefore, an object of this document is to provide test methods to ensure compatibility of cords
to be used in cabling in accordance with ISO/IEC 11801-1 and to demonstrate their performance
and reliability during their operational lifetime.
– 8 – IEC 61935‑2:2022 © IEC 2022
SPECIFICATION FOR THE TESTING OF BALANCED AND
COAXIAL INFORMATION TECHNOLOGY CABLING –
Part 2: Cords as specified in ISO/IEC 11801-1 and related standards
1 Scope
This part of IEC 61935 specifies test methods for balanced and coaxial cords, which are used
as equipment cords, patch cords, and CP cords, within cabling systems, in accordance with
ISO/IEC 11801-1. The test methods and associated requirements are provided to demonstrate
performance and reliability and to ensure compatibility of these balanced and coaxial cords
during their operational lifetime. This document may also be used for providing test
methodology for assessing the performance of other cords.
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.
IEC 60068‑2‑61, Environmental testing – Part 2-61: Test methods – Test Z/ABDM: Climatic
sequence
IEC 60512‑26‑100, Connectors for electronic equipment – Tests and measurements –
Part 26-100: Measurement setup, test and reference arrangement and measurements for
connectors according to IEC 60603-7 – Tests 26a to 26g
IEC 60512‑27‑100, Connectors for electronic equipment – Tests and measurements –
Part 27-100: Signal integrity tests up to 500 MHz on 60603-7 series connectors – Tests 27a to
27g
IEC 60512‑28‑100, Connectors for electronic equipment – Tests and measurements –
Part 28-100: Signal integrity tests up to 2 000 MHz – Tests 28a to 28g
IEC 60512‑29‑100, Connectors for electronic equipment – Tests and measurements –
Part 29-100: Signal integrity tests up to 500 MHz on M12 style connectors – Tests 29a to 29g
IEC 60603‑7, Connectors for electronic equipment – Part 7: Detail specification for 8-way,
unshielded, free and fixed connectors
IEC 60603‑7‑1, Connectors for electronic equipment – Part 7-1: Detail specification for 8-way,
shielded, free and fixed connectors
IEC 60603‑7‑2, Connectors for electronic equipment – Part 7-2: Detail specification for 8-way,
unshielded, free and fixed connectors, for data transmissions with frequencies up to 100 MHz
IEC 60603‑7‑3, Connectors for electronic equipment – Part 7-3: Detail specification for 8-way,
shielded, free and fixed connectors, for data transmission with frequencies up to 100 MHz
IEC 60603‑7‑4, Connectors for electronic equipment – Part 7-4: Detail specification for 8-way,
unshielded, free and fixed connectors, for data transmissions with frequencies up to 250 MHz
IEC 61935‑2:2022 © IEC 2022 – 9 –
IEC 60603‑7‑5, Connectors for electronic equipment – Part 7-5: Detail specification for 8-way,
shielded, free and fixed connectors, for data transmissions with frequencies up to 250 MHz
IEC 60603‑7‑7, Connectors for electronic equipment – Part 7-7: Detail specification for 8-way,
shielded, free and fixed connectors for data transmission with frequencies up to 600 MHz
IEC 60603‑7‑41, Connectors for electronic equipment – Part 7-41: Detail specification for
8-way, unshielded, free and fixed connectors, for data transmissions with frequencies up to 500
MHz
IEC 60603‑7‑51, Connectors for electronic equipment – Part 7-51: Detail specification for
8-way, shielded, free and fixed connectors, for data transmissions with frequencies up to
500 MHz
IEC 60603‑7‑71, Connectors for electronic equipment – Part 7-71: Detail specification for
8-way, shielded, free and fixed connectors, for data transmission with frequencies up to
1 000 MHz
IEC 60603‑7‑81, Connectors for electronic equipment – Part 7-81: Detail specification for
8-way, shielded, free and fixed connectors, for data transmissions with frequencies up to
2 000 MHz
IEC 60603‑7‑82, Connectors for electronic equipment – Part 7-82: Detail specification for
8-way, 12 contacts, shielded, free and fixed connectors, for data transmission with frequencies
up to 2 000 MHz
IEC 60966‑1, Radio frequency and coaxial cable assemblies – Part 1: Generic specification –
General requirements and test methods
IEC 61076‑2‑101, Connectors for electronic equipment – Product requirements – Part 2-101:
Circular connectors – Detail specification for M12 connectors with screw-locking
IEC 61076‑2‑109, Connectors for electronic equipment – Product requirements – Part 2-109:
Circular connectors – Detail specification for connectors with M 12 × 1 screw-locking, for data
transmission frequencies up to 500 MHz
IEC 61076‑3‑104, Connectors for electronic equipment – Product requirements – Part 3-104:
Detail specification for 8-way, shielded free and fixed connectors for data transmissions with
frequencies up to 2 000 MHz
IEC 61076‑3‑110, Connectors for electronic equipment – Product requirements – Part 3-110:
Detail specification for free and fixed connectors for data transmission with frequencies up to
3 000 MHz
IEC 61156‑1, Multicore and symmetrical pair/quad cables for digital communications – Part 1:
Generic specification
IEC TR 61156‑1‑2, Multicore and symmetrical pair/quad cables for digital communications –
Part 1-2: Electrical transmission characteristics and test methods of symmetrical pair/quad
cables
IEC 61156‑5, Multicore and symmetrical pair/quad cables for digital communications – Part 5:
Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz – Horizontal
floor wiring – Sectional specification
– 10 – IEC 61935‑2:2022 © IEC 2022
IEC 61156‑6, Multicore and symmetrical pair/quad cables for digital communications – Part 6:
Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz – Work area
wiring – Sectional specification
IEC 61156‑9, Multicore and symmetrical pair/quad cables for digital communications – Part 9:
Cables for channels with transmission characteristics up to 2 GHz – Sectional specification
IEC 61156‑10, Multicore and symmetrical pair/quad cables for digital communications –
Part 10: Cables for cords with transmission characteristics up to 2 GHz – Sectional specification
IEC 61169‑1, Radio-frequency connectors – Part 1: Generic specification – General
requirements and measuring methods
IEC 61169‑1 (all parts), Radio-frequency connectors – Part 1
IEC 61169‑2, Radio-frequency connectors – Part 2: Sectional specification – Radio frequency
coaxial connectors of type 9,52
IEC 61169‑24, Radio-frequency connectors – Part 24: Sectional specification – Radio
frequency coaxial connectors with screw coupling, typically for use in 75 Ω cable networks
(type F)
IEC 61196‑1 (all parts), Coaxial communication cables – Part 1
IEC 61935‑1, Specification for the testing of balanced and coaxial information technology
cabling – Part 1: Installed balanced cabling as specified in ISO/IEC 11801-1 and related
standards
IEC 61935‑1‑1, Specification for the testing of balanced and coaxial information technology
cabling – Part 1-1: Additional requirements for the measurement of transverse conversion loss
and equal level transverse conversion transfer loss
IEC 61935‑1‑2, Specification for the testing of balanced and coaxial information technology
cabling – Part 1‑2: Installed balanced cabling as specified in ISO/IEC 11801 – Additional
requirements for measurement of resistance unbalance with field test instrumentation
IEC 62153‑4‑11, Metallic communication cable test methods – Part 4-11: Electromagnetic
compatibility (EMC) – Coupling attenuation or screening attenuation of patch cords, coaxial
cable assemblies, pre-connectorized cables – Absorbing clamp method
IEC 62153‑4‑15, Metallic communication cable test methods – Part 4-15: Electromagnetic
compatibility (EMC) – Test method for measuring transfer impedance and screening attenuation
– or coupling attenuation with triaxial cell
ISO/IEC 11801‑1, Information technology – Generic cabling for customer premises – Part 1:
General requirements
ISO/IEC 14763‑4, Information technology – Implementation and operation of customer
premises cabling – Part 4: Measurement of end-to-end (E2E) links
IEC 61935‑2:2022 © IEC 2022 – 11 –
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
cable assembly
combination of cable(s) and connector(s) with specified performance, used as a single unit
intended to be a part of a cabling link as defined in ISO/IEC 11801-1 (or equivalent)
3.2
consolidation point cord
cabling between the consolidation point to the telecommunications outlet(s)
3.3
cord
cable, cable unit or cable element with a minimum of one termination; a cable assembly as
defined in IEC 61935-1 whatever its targeted use
3.4
equipment cord
cord connecting to equipment
3.5
patch cord
cord specifically used to establish connections on a patch panel
3.6
work area cord
cord specifically connecting to work area equipment
4 Requirements
4.1 Cord components: cable and connector
The specifications in this document cover cords used within channels in cabling systems in
accordance with ISO/IEC 11801-1, e.g. equipment cords, patch cords, work area cords, and
consolidation point (CP) cords.
The cabling standards specified in ISO/IEC 11801-1 comprise two basic types of electrical
cords, i.e. balanced and coaxial.
Cords shall conform to the requirements given in ISO/IEC 11801-1 and in the blank detail
specifications.
– 12 – IEC 61935‑2:2022 © IEC 2022
Balanced cord cable components shall conform to the requirements given in IEC 61156-1,
IEC 61156-5, IEC 61156-6, IEC 61156-9, and IEC 61156-10, and in the blank detail
specifications. Balanced cord connector components shall conform to the requirements given
in the IEC 60603-7 series, IEC 61076-3-104, IEC 61076-3-110, IEC 61076-2-101, and
IEC 61076-2-109, and in the blank detail specifications; IEC 60603-7 series 8-pole RJ45
connector types include IEC 60603-7-1, IEC 60603-7-2, IEC 60603-7-3, IEC 60603-7-4,
IEC 60603-7-5, IEC 60603-7-7, IEC 60603-7-41, IEC 60603-7-51, IEC 60603-7-71,
IEC 60603-7-81, and IEC 60603-7-82.
Coaxial cord cable components shall conform to the requirements given in the IEC 61196-1
series, and in the blank detail specifications. Coaxial cord connector components shall conform
to the requirements given in the IEC 61169-1 series, including IEC 61169-2, IEC 61169-24, and
in the blank detail specifications.
The component cables and connectors for cords are specified in ISO/IEC 11801-1 and in the
blank detail specifications.
These test methods and procedures for cords are specified in ISO/IEC 11801-1 and in its
reference ISO/IEC 14763-4, standards for cabling channel conformance and test procedures.
These test procedures for cords conform to the test procedure standards listed in Table 1.
Table 1 – Test procedure standards for cords
Cord type Coaxial cable cords Balanced cable cords
Test procedure IEC 60966-1 IEC 61935-1
4.2 Cord tests
4.2.1 General
Cords shall be tested in accordance with the procedures specified herein.
The cord tests include two groups of tests: acceptance tests that may be performed on each
cord or representative samples, and periodic tests that are only performed on representative
samples.
The acceptance tests described in this document shall be performed on a minimum sample of
5 % of each lot/batch of cords. It is recommended to perform the acceptance test of this
document on each cord.
The periodic tests described in this document are type tests that shall be performed in
accordance with the quality system of the manufacturer.
In addition to the detail specifications, other certification test schedules for cords can refer to
these tests.
Parameters specified in this document, which are not tested in accordance with a particular
detail specification, are tested by design by using qualified components, which are tested
accordingly.
For other cords, the cables and connectors shall be assessed separately in accordance with
their respective standard unless there are no component standards. In this case, all tests are
performed on the cords, including interface tests.
IEC 61935‑2:2022 © IEC 2022 – 13 –
4.2.2 Acceptance tests
Primary, electrical transmission, compliance tests, shall be performed:
a) visual inspection (balanced and coaxial cords);
b) wire map (balanced cords);
c) return loss (balanced and coaxial cords);
d) pair-to-pair NEXT and PS NEXT (balanced cords).
Additional optional tests may be performed when the compliance of cord or assembly
components to respective component standards has not been assured:
e) insertion loss and attenuation (balanced and coaxial cords);
f) pair-to-pair ACRF and PS ACRF (balanced cords);
g) alien crosstalk, PS ANEXT and PS AACRF, (balanced cords);
h) unbalance attenuation, TCL and EL TCTL, (balanced cords);
i) coupling attenuation (screened balanced cords);
j) screening attenuation and transfer impedance (screened balanced and coaxial cords);
k) propagation delay (balanced and coaxial cords);
l) delay skew (balanced cords);
m) DC resistance (balanced and coaxial cords);
n) DC resistance unbalance within pairs (balanced cords);
o) DC resistance unbalance between pairs (balanced cords).
The acceptance tests are described in Clause 5.
4.2.3 Periodic tests
Secondary, mechanical and environmental, qualification tests:
a) tensile strength;
b) flexure;
c) bending/twisting;
d) crushing;
e) dust test;
f) climatic sequence;
The periodic tests are described in detail in Clause 6.
4.3 Cord test procedure
4.3.1 General
Acceptance tests are based directly on the results of specific electrical transmission
parameters' measurements, which are described herein. The electrical transmission
parameters' measurements are made using qualified test fixtures with reference test heads.
Periodic tests are based indirectly on the results of electrical transmission parameters'
measurements, the same as acceptance tests, which are made before and after subjecting a
sample to specific mechanical and environmental conditioning procedures, which are also
described herein.
– 14 – IEC 61935‑2:2022 © IEC 2022
4.3.2 Electrical transmission parameters, test fixtures and reference test heads
4.3.2.1 General
A test fixture and reference test head are constructed from a selected standard connector,
which conforms to 3 layers of transmission performance specifications:
• First layer, basic transmission performance requirements in accordance with the respective
component connector standard.
• Second layer, additional transmission performance requirements for a reference test head
(connector), in accordance with the respective component connector test standard;
additional requirements ensure sufficient additional performance margins, which are
required to accurately measure the basic, standard transmission performance requirements.
• Third layer, special transmission performance requirements for a reference test head,
(connector), in accordance with the respective component connector test standard; special
requirements ensure specialized performance parameter requirements for specific
connectors, e.g. crosstalk compensation specifications of the IEC 60603‑7 series'
connectors.
4.3.2.2 Coaxial cords transmission parameters test requirements
Coaxial cords' transmission parameters test shall conform to the requirements of IEC 60966-1,
and shall be in accordance with Annex A.
4.3.2.3 Balanced cords transmission parameters test requirements
Balanced cords' transmission parameters test shall conform to the requirements of IEC 61935-1
and IEC TR 61156-1-2 and shall be in accordance with Annex B.
5 Acceptance tests and additional optional tests
5.1 Visual inspection (balanced and coaxial cords)
Visual inspection of cords shall be performed without additional magnification:
a) the condition, workmanship and finish are satisfactory;
b) the marking, when specified in the relevant specification, is legible;
c) mechanical damage is absent and there is no undesired movement or displacement of parts;
d) flaking of materials or finishes is absent;
e) the length as specified.
5.2 Wire map (balanced cords)
A conductor map test is intended to verify correct pin termination at each end and to check for
installation connectivity errors. For each of the conductors in the cable, and the screen(s), if
any, the conductor map indicates
a) continuity to the remote end;
b) shorts between any two or more conductors/screen(s);
c) transposed pairs (balanced cords);
d) reversed pairs (balanced cords);
e) split pairs (balanced cords);
f) any other connection errors.
Items a) and b) are applicable to coaxial cords.
IEC 61935‑2:2022 © IEC 2022 – 15 –
Correct connectivity of telecommunications outlet/connectors is defined in ISO/IEC 11801-1 or
within the detail specification.
Balanced cord wire map shall be tested in accordance with IEC 61935-1 and a conformant result
shall be reported as "pass".
5.3 Return loss (balanced and coaxial cords)
Return loss measurements and tests shall be performed in accordance with IEC 61935-1 and
IEC TR 61156-1-2 for balanced cords, and in accordance with IEC 60966-1 for coaxial cords.
5.4 Pair-to-pair NEXT and PS NEXT (balanced cords)
Pair-to-pair NEXT and PS NEXT measurements and tests shall be performed in accordance
with IEC 61935-1 and IEC TR 61156-1-2 for balanced cords.
5.5 Insertion loss and attenuation (balanced and coaxial cords)
Insertion loss and attenuation measurements and tests shall be performed in accordance with
IEC 61935-1 and IEC TR 61156-1-2 for balanced cords, and in accordance with IEC 60966-1
for coaxial cords.
5.6 Pair-to-pair ACRF and PS ACRF (balanced cords)
Pair-to-pair ACRF and PS ACRF measurements and tests shall be performed in accordance
with IEC 61935-1 and IEC TR 61156-1-2 for balanced cords.
5.7 Alien crosstalk, PS ANEXT and PS AACRF, (balanced cords)
Alien crosstalk, PS ANEXT and PS AACRF measurements and tests shall be performed in
accordance with IEC 61935-1 and IEC TR 61156-1-2 for balanced cords.
5.8 Unbalance attenuation, TCL and EL TCTL, (balanced cords)
Unbalance attenuation, TCL and EL TCTL measurements and tests shall be performed in
accordance with IEC 61935-1 and IEC TR 61156-1-2 for balanced cords.
Unbalance attenuation, TCL and EL TCTL measurements and tests shall also be performed in
accordance with IEC 61935-1-1.
5.9 Coupling attenuation (screened balanced cords)
Coupling attenuation measurements and tests shall be performed in accordance with
IEC 61935-1 and IEC TR 61156-1-2 for screened balanced cords.
Coupling attenuation measurements and tests shall also be performed in accordance with
2153-4-15.
IEC 62153-4-11 and IEC 6
5.10 Screening attenuation and transfer impedance (screened balanced and coaxial
cords)
Screening attenuation and transfer impedance measurements and tests shall be performed in
accordance with IEC 61935-1 and IEC TR 61156-1-2 for screened balanced cords, and in
accordance with IEC 60966-1 for coaxial cords.
Screening attenuation and transfer impedance measurements and tests shall also be performed
in accordance with IEC 6215
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...