IEC 61935-2-20:2008

IEC 61935-2-20 ®
Edition 1.0 2008-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Testing of balanced communication cabling in accordance with ISO/IEC 11801 –
Part 2-20: Patch cords and work area cords – Blank detail specification for
class D applications
Essais de câblages de télécommunications symétriques selon l’ISO/IEC 11801 –
Partie 2-20: Cordons de brassage et cordons de zone de travail – Spécification
particulière cadre pour les applications de classe D

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IEC 61935-2-20 ®
Edition 1.0 2008-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Testing of balanced communication cabling in accordance with ISO/IEC 11801 –
Part 2-20: Patch cords and work area cords – Blank detail specification for
class D applications
Essais de câblages de télécommunications symétriques selon l’ISO/IEC 11801 –
Partie 2-20: Cordons de brassage et cordons de zone de travail – Spécification
particulière cadre pour les applications de classe D

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
L
CODE PRIX
ICS 33.120.20 ISBN 978-2-88910-589-2
– 2 – 61935-2-20 © IEC:2008
CONTENTS
FOREWORD.3
1 Scope.5
2 Normative references .5
3 Guidance for preparation of detail specifications .6
4 Blank detail specification for work area cord for class D applications.8
Bibliography.11

61935-2-20 © IEC:2008 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TESTING OF BALANCED COMMUNICATION
CABLING IN ACCORDANCE WITH ISO/IEC 11801 –

Part 2-20: Patch cords and work area cords –
Blank detail specification for class D applications

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
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Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
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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
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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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.
International Standard IEC 61935-2-20 has been prepared by IEC technical committee 46:
Cables, wires, waveguides, R.F. connectors, R.F. and microwave passive components and
accessories.
This first edition cancels and replaces the ISO/IEC PAS 61935-2-20 published in 2007.
It constitutes a technical revision.
This bilingual version, published in 2009-05, corresponds to the English version.

– 4 – 61935-2-20 © IEC:2008
The text of this standard is based on the following documents:
FDIS Report on voting
46/270/FDIS 46/278/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
The French version of this standard has not been voted upon.
This blank detail specification is to be used in conjunction with IEC 61156-1, IEC 61156-6,
IEC 60603-7-2 and IEC 60603-7-3.
A list of all parts of the IEC 61935 series can be found, under the general title Testing of
balanced communication cabling in accordance with ISO/IEC 11801, on the IEC website.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition; or
• amended.
61935-2-20 © IEC:2008 – 5 –
TESTING OF BALANCED COMMUNICATION
CABLING IN ACCORDANCE WITH ISO/IEC 11801 –

Part 2-20: Patch cords and work area cords –
Blank detail specification for class D applications

1 Scope
This blank detail specification describes work area cord for class D applications, as defined in
ISO/IEC 11801 as well as in the ISO/IEC 24702.
This blank detail specification determines the layout and style for detail specifications
describing cords with transmission characteristics up to 100 MHz for digital communications.
Detail specifications, based on this blank detail specification, may be prepared by a national
organization, a manufacturer, or a user.
Test configuration applicable to cords is detailed in the IEC 61935-2.
The designation "Category 5e" is used herein to describe an enhanced category 5 cable
(see Clause 1 of IEC 61156-6).
2 Normative references
The following referenced documents are indispensable for the application 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 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 transmissions with frequencies up to 100 MHz
IEC 60794-1-2, Optical fibre cables – Part 1-2: Generic specification – Basic optical cable test
procedures
IEC 61156-1:2007, Multicore and symmetrical pair/quad cables for digital communications –
Part 1: Generic specification
IEC 61156-6:2007, 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 61935-2:2005, Testing of balanced communication cabling in accordance with
ISO/IEC 11801 – Patch cords and work area cords
IEC 62012-1, Multicore and symmetrical pair/quad cables for digital communications to be
used in harsh environments – Part 1: Generic specifications
ISO/IEC 11801, Information technology – Generic cabling for customer premises
ISO/IEC 24702, Information technology – Generic cabling – Industrial premises

– 6 – 61935-2-20 © IEC:2008
EN 50289-1-13, Communication cables – Specifications for test methods – Part 1-13:
Electrical test methods – Coupling attenuation or screening attenuation of patch cords /
coaxial cable assemblies / pre-connectorised cables
3 Guidance for preparation of detail specifications
It is necessary to keep the transmission characteristics indicated in the relevant sectional
specification for the referenced category number, i.e. 5e and the characteristic impedance.
The detail specification shall be written in accordance with the layout of the blank detail
specification, which forms part of this standard.
NOTE 1 When a characteristic does not apply, then “na” (for not applicable) should be entered in the appropriate
space.
NOTE
...