IEC 61935-2:2003

Generic cabling systems - Specification for the testing of balanced communication cabling in accordance with ISO/IEC 11801 - Part 2: Patch cords and work area cords

provides methods to ensure compatibility of modular plug cords to be used in cabling according to ISO/IEC 11801 and also provides test methods and associated requirements to demonstrate the performance and reliability of these cords during their operational lifetime.

General Information

• Status: Published
• Publication Date: 15-May-2003
• ICS: 33.040.20 - Transmission systems
• ICS: 33.120.20 - Wires and symmetrical cables
• Technical Committee: SC 46A - Coaxial cables
• Drafting Committee: WG 2 - TC 46/SC 46A/WG 2
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 26-Sep-2005

Relations

• Revised: IEC 61935-2:2005 - Testing of balanced communication cabling in accordance with ISO/IEC 11801 - Part 2: Patch cords and work area cords
• Effective Date: 05-Sep-2023

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD
61935-2
First edition
2003-05
Generic cabling systems –
Specification for the testing of balanced
communication cabling in accordance
with ISO/IEC 11801 –
Part 2:
Patch cords and work area cords

Reference number
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the

60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.

Consolidated editions
The IEC is now publishing consolidated versions of its publications. For example,

edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the

base publication incorporating amendment 1 and the base publication incorporating

amendments 1 and 2.
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INTERNATIONAL IEC
STANDARD
61935-2
First edition
2003-05
Generic cabling systems –
Specification for the testing of balanced
communication cabling in accordance
with ISO/IEC 11801 –
Part 2:
Patch cords and work area cords

 IEC 2003  Copyright - all rights reserved
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 the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail]  Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale
T
International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

– 2 – 61935-2  IEC:2003(E)
CONTENTS
FOREWORD . 4

INTRODUCTION .5

1 Scope . 6

2 Normative references. 6

3 Definitions . 6

4 General requirements and test configuration. 6

4.1 Cable and connector design . 6

4.2 Cable and connector tests . 7
4.3 Test configuration and equipment . 7
4.4 Modular plug cord tests requirements. . 8
4.5 Pass/fail test limits. 8
5 Acceptance tests . 8
5.1 Visual inspection . 8
5.2 Wire map. 9
5.3 Propagation delay.10
5.4 Delay skew .10
5.5 Insertion loss/operational attenuation .10
5.6 Return loss .10
5.7 Near End Crosstalk Attenuation (NEXT) .13
6 Periodic tests.15
6.1 General .15
6.2 Tensile strength.15
6.3 Flexure .16
6.4 Bending/twisting .17
6.5 Crushing.18
6.6 Dust test.19
6.7 Coupling attenuation.21
6.8 Climatic sequence .21
7 Test head requirements .22
7.1 General .22
7.2 Compliance with category 6 requirements.22
7.3 Additional FEXT requirements .22

7.4 Additional return loss requirements.22
7.5 NEXT loss centring requirements.22
7.6 Adjustment of connector NEXT assumptions.23
Figure 1 – Transmission performance test configuration for patch cords. 7
Figure 2 – Correct pairing .9
Figure 3 – Incorrect pairing .9
Figure 4 – Test arrangement for the return loss.10
Figure 5 – TDR response .11
Figure 6 – Calibration procedure .12
Figure 7 – Network analyzer configuration.15
Figure 8 – Fixture for cable assembly flexure test .16
Figure 9 – Bending test: assembly in U shape.17

61935-2  IEC:2003(E) – 3 –
Figure 10 – Twisting test: assembly in U shape.18

Figure 11 – Fixture for cable crushing test .19

Figure 12 – Measuring device .21

Figure 13 – Centring of NEXT properties of the test head.23

Table 1 – Uncertainty band of return loss measurement .12

– 4 – 61935-2  IEC:2003(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
GENERIC CABLING SYSTEMS –
SPECIFICATION FOR THE TESTING OF BALANCED COMMUNICATION

CABLING IN ACCORDANCE WITH ISO/IEC 11801 –

Part 2: Patch cords and work area cords

FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61935-2 has been prepared by subcommittee SC 46A:Coaxial
cables, of IEC technical committee TC 46: Cables, wires, waveguides, r.f. connectors, r.f. and
microwave passive components and accessories.
The text of this standard is based on the following documents:
FDIS Report on voting
46A/532/FDIS 46A/544/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.
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
2004. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
A bilingual edition of this standard may be issued at a later date.

61935-2  IEC:2003(E) – 5 –
INTRODUCTION
Modular plug cords are constructed for connecting equipment using modular connecting

hardware. It is known that connecting hardware performance is subject to influence by the

properties of the modular plug termination and therefore modular plug cords should be tested

to determine the quality of the assembly. Moreover, the performance of modular plug cords

may differ due to the performances of the involved separate components depending upon

the efficiency of the manufacturing procedure. Manufacturing procedures also impact on the

reliability of these cords. Therefore, the object of this standard is to provide test methods to

ensure compatibility of modular plug cords to be used in cabling according to ISO/IEC 11801.

Also, it provides test methods and associated requirements to demonstrate the performance

and reliability of these cords during their operational lifetime.

– 6 – 61935-2  IEC:2003(E)
GENERIC CABLING SYSTEMS –
SPECIFICATION FOR THE TESTING OF BALANCED COMMUNICATION

CABLING IN ACCORDANCE WITH ISO/IEC 11801 –

Part 2: Patch cords and work area cords

1 Scope
This part of IEC 61935 provides methods to ensure compatibility of modular plug cords to be
used in cabling according to ISO/IEC 11801 and also provides test methods and associated
requirements to demonstrate the performance and reliability of these cords during their
operational lifetime.
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 60068-2-61:1991, Environmental testing – Part 2-61: Test methods – Test Z/ABDM:
Climatic sequence
IEC 60603-7, Connectors for frequencies below 3 MHz for use with printed boards
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
...