IEC 61935-2:2010

Specification for the testing of balanced and coaxial information technology cabling - Part 2: Cords as specified in ISO/IEC 11801 and related standards

IEC 61935-2:2010 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 third edition cancels and replaces the second edition published in 2005. It differs from the second edition in that it covers category 6A to category 7A cords as defined in ISO/IEC 11801.

Spécification relative aux essais des câblages symétriques et coaxiaux des technologies de l'information - Partie 2: Cordons tels que spécifiés dans l'ISO/CEI 11801 et normes associées

La CEI 61935-2:2010 fournit des méthodes en vue de s'assurer de la compatibilité des cordons à paires symétriques à utiliser dans les câblages selon l'ISO/IEC 11801, ainsi que des méthodes d'essai et leurs exigences associées pour démontrer les performances et la fiabilité de ces cordons à paires symétriques au cours de leur durée de vie opérationnelle. La présente Norme internationale peut également être utilisée en vue de fournir des méthodes d'essai pour l'évaluation du comportement d'autres cordons à paires symétriques. Cette troisième édition annule et remplace la deuxième édition publiée en 2005. Elle diffère de la deuxième édition en ce qu'elle couvre les cordons de catégorie 6A à catégorie 7A, comme défini dans l'ISO/IECEI 11801.

General Information

• Status: Published
• Publication Date: 11-Jul-2010
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 33.040.20 - Transmission systems
• ICS: 33.120.20 - Wires and symmetrical cables
• Technical Committee: TC 46 - Cables, wires, waveguides, RF connectors, RF and microwave passive components and accessories
• Drafting Committee: MT 61935-2 - TC 46/MT 61935-2
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 08-Feb-2022

Relations

• Revised: IEC 61935-2:2022 - Specification for the testing of balanced and coaxial information technology cabling - Part 2: Cords as specified in ISO/IEC 11801-1 and related standards
• Effective Date: 05-Sep-2023
• Revises: 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)

IEC 61935-2 ®
Edition 3.0 2010-07
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 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/CEI 11801
et normes associées
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IEC 61935-2 ®
Edition 3.0 2010-07
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 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/CEI 11801
et normes associées
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
U
CODE PRIX
ICS 33.040.20; 33.120.20 ISBN 978-2-88912-001-7
– 2 – 61935-2 © IEC:2010
CONTENTS
FOREWORD.4
INTRODUCTION.6

1 Scope.7
2 Normative references .7
3 Terms and definitions .8
4 General requirements and test configuration .8
4.1 Cable and connector design .8
4.2 Balanced cord, cable and connector tests .8
4.3 Test configuration and equipment.8
4.4 Balanced cord tests requirements .9
5 Acceptance tests .10
5.1 Visual inspection .10
5.2 Wire map.11
5.3 Propagation delay .12
5.4 Delay skew.12
5.5 Insertion loss.12
5.6 Return loss.12
5.7 Near end crosstalk (NEXT).13
5.8 Assumptions used in the development of cord requirements.16
6 Balanced cord test procedure – Network analyser test configuration .16
7 Periodic tests .17
7.1 General .17
7.2 Tensile strength .17
7.3 Flexure.18
7.4 Bending.19
7.5 Twisting.19
7.6 Crushing .20
7.7 Dust test.21
7.8 Coupling attenuation .23
7.9 Climatic sequence .24
8 Test head requirements.24
8.1 General .24
8.2 Minimum requirements for all test head designs .24
8.3 Additional FEXT requirements for balanced connector compatible test heads.25
8.4 Additional return loss requirements for balanced connector compatible test
heads .25
8.5 NEXT loss centering requirements for balanced connector compatible test
heads .25
Bibliography.27

61935-2 © IEC:2010 – 3 –
Figure 1 – Test configuration for balanced cord for NEXT and return loss
measurements .9
Figure 2 – Correct pairing .11
Figure 3 – Incorrect pairing .11
Figure 4 – Initial marking of the cable sheath.17
Figure 5 – Final visual inspection.17
Figure 6 – Fixture for balanced cord flexure test .18
Figure 7 – Bending test: assembly in U shape .19
Figure 8 – Twisting test: assembly in U shape .20
Figure 9 – Fixture for cable crushing test .21
Figure 10 – Measuring device .23
Figure 11 – Centering of NEXT properties of the balanced connector test head .26

Table 1 – Return loss requirements .13
Table 2 – Balanced cord return loss requirements at key frequencies .13
Table 3 – Category 5 balanced cord NEXT requirements at key frequencies.15
Table 4 – Category 6 balanced cord NEXT requirements at key frequencies.15
Table 5 – Category 6 balanced cord NEXT requirements at key frequencies .15
A
Table 6 – Category 7 balanced cord NEXT requirements at key frequencies.15
Table 7 – Category 7 balanced cord NEXT requirements at key frequencies .15
A
Table 8 – Assumptions for cabling components used in the development of NEXT and
return loss requirements .16
Table 9 – Coupling attenuation limits .23

– 4 – 61935-2 © IEC:2010
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SPECIFICATION FOR THE TESTING OF BALANCED AND
COAXIAL INFORMATION TECHNOLOGY CABLING –

Part 2: Cords as specified in ISO/IEC 11801 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,
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