ISO/IEC 24764:2010

Information technology - Generic cabling systems for data centres

ISO/IEC 24764:2010(E) specifies generic cabling that supports a wide range of communications services for use within a data centre. It covers balanced cabling and optical fibre cabling. It is based upon and references the requirements of ISO/IEC 11801 and contains additional requirements that are appropriate to data centres in which the maximum distance over which communications services have to be distributed is 2 000 m.
This publication is to be read in conjunction with ISO/IEC 11801:2002, its amendment 1:2008and its amendment 2:2010.

General Information

• Status: Replaced
• Publication Date: 29-Apr-2014
• ICS: 35.200 - Interface and interconnection equipment
• Technical Committee: ISO/IEC JTC 1/SC 25 - Interconnection of information technology equipment
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 13-Nov-2017

Relations

• Replaced By: ISO/IEC 11801-5:2017 - Information technology - Generic cabling for customer premises - Part 5: Data centres
• Effective Date: 05-Sep-2023
• Amended By: ISO/IEC 24764:2010/AMD1:2014 - Amendment 1 - Information technology - Generic cabling systems for data centres
• Effective Date: 05-Sep-2023

Standards Content (Sample)

ISO/IEC 24764
Edition 1.0 2010-04
INTERNATIONAL
STANDARD
Information technology – Generic cabling systems for data centres

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
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ISO/IEC 24764
Edition 1.0 2010-04
INTERNATIONAL
STANDARD
Information technology – Generic cabling systems for data centres

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
R
ICS 35.200 ISBN 978-2-88910-836-7

– 2 – 24764 © ISO/IEC:2010(E)
CONTENTS
FOREWORD.5

INTRODUCTION.6

1 Scope.8

2 Normative references .8

3 Terms and definitions and abbreviations.10

3.1 Terms and definitions .10

3.2 Abbreviations .11

4 Conformance.11
5 Structure of the generic cabling system .12
5.1 General .12
5.2 Functional elements .12
5.3 General structure and hierarchy .13
5.4 Cabling subsystems .14
5.4.1 General .14
5.4.2 Network access cabling subsystem.14
5.4.3 Main distribution cabling subsystem .14
5.4.4 Zone distribution cabling subsystem .15
5.4.5 Design objectives .15
5.5 Accommodation of functional elements.15
5.6 Interfaces .16
5.6.1 Equipment interfaces and test interfaces .16
5.6.2 Channels and links .16
5.7 Dimensioning and configuring.18
5.7.1 Distributors.18
5.7.2 Redundancy .18
5.7.3 External network interface .19
5.7.4 Cables.20
5.7.5 Equipment cords.20
5.7.6 Patch cords and jumpers .20
5.7.7 Equipment outlets.20
5.7.8 LDP .20
5.7.9 Building entrance facilities.21

5.8 Earthing and equipotential bonding .21
6 Channel performance .21
6.1 General .21
6.2 Transmission performance .22
6.2.1 General .22
6.2.2 Balanced cabling .22
6.2.3 Optical fibre cabling.22
7 Reference implementations .22
7.1 General .22
7.2 Balanced cabling.23
7.2.1 Assumptions.23
7.2.2 Zone distribution cabling.23
7.2.3 Main distribution cabling .26
7.2.4 Network access cabling .28

24764 © ISO/IEC:2010(E) – 3 –
7.3 Optical fibre cabling .30

7.3.1 Assumptions.30

7.3.2 Component choice.30

7.3.3 Optical fibre cabling channel lengths .30

8 Cable requirements .31

8.1 General .31

8.2 Balanced cables .31

8.3 Optical fibre cables.31

9 Connecting hardware requirements .31

9.1 General requirements.31
9.1.1 Overview .31
9.1.2 Applicability .31
9.1.3 Location .31
9.1.4 Design.31
9.1.5 Operating environment .31
9.1.6 Mounting .31
9.1.7 Installation practices.32
9.1.8 Marking and colour coding.32
9.2 Connecting hardware for balanced cabling .32
9.2.1 General requirements .32
9.2.2 Performance marking .32
9.2.3 Mechanical characteristics.32
9.3 Connecting hardware for optical fibre cabling .35
9.3.1 General requirements .35
9.3.2 ENI requirements.35
9.3.3 EO requirements .35
9.3.4 Optical fibre assignments at the EO.35
9.3.5 Other connecting hardware.36
10 Requirements for cords and jumpers .37
10.1 Jumpers .37
10.2 Balanced cords .37
10.3 Optical fibre cords .37
Annex A (normative) Link performance limits .38
A.1 General .38

A.2 Balanced cabling .39
A.3 Optical fibre cabling.40
Annex B (informative) Usage of high density connecting hardware within optical fibre
cabling.41
B.1 General .41
B.2 Structure of cabling subsystems .41
Bibliography.44

Figure 1 – Relationship between generic cabling standards .7
Figure 2 – Structure of generic cabling within a data centre .13
Figure 3 – Hierarchical structure of generic cabling within a data centre .14
Figure 4 – Example of accommodation of functional elements .15
Figure 5 – Test and equipment interfaces .17

– 4 – 24764 © ISO/IEC:2010(E)
Figure 6 – Connection of functional elements providing redundancy .19

Figure 7 – Examples of external service cabling connections to the ENI .20

Figure 8 – Example of a channel with 4 connections .21

Figure 9 – Example of a system showing the location of cabling interfaces .22

Figure 10 – Zone distribution cabling models .24

Figure 11 – Main distribution cabling models .27

Figure 12 – Network access cabling models.29

Figure 13 – Pin grouping and pair assignments at the EO .34

Figure 14 – Optical fibre assignments at the EO, front view o
...

ISO/IEC 24764
Edition 1.1 2014-04
CONSOLIDATED
VERSION
colour
inside
Information technology – Generic cabling systems for data centres

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
ISO/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 Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]

CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
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 corrigenda or an amendment might have been published.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
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ISO/IEC 24764
Edition 1.1 2014-04
CONSOLIDATED
VERSION
colour
inside
Information technology – Generic cabling systems for data centres

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 35.200 ISBN 978-2-8322-1556-2

ISO/IEC 24764
Edition 1.1 2014-04
REDLINE VERSION
colour
inside
Information technology – Generic cabling systems for data centres

– 2 – ISO/IEC 24764:2010
+AMD1:2014 CSV  ISO/IEC 2014
CONTENTS
FOREWORD . 6

INTRODUCTION . 8

INTRODUCTION to Amendment 1 . 9

1 Scope . 10

2 Normative references . 10

3 Terms and definitions and abbreviations . 12

3.1 Terms and definitions . 12

3.2 Abbreviations . 13
4 Conformance . 14
5 Structure of the generic cabling system . 14
5.1 General . 14
5.2 Functional elements . 15
5.3 General structure and hierarchy . 15
5.4 Cabling subsystems . 17
5.4.1 General . 17
5.4.2 Network access cabling subsystem . 17
5.4.3 Main distribution cabling subsystem . 17
5.4.4 Zone distribution cabling subsystem . 18
5.4.5 Design objectives . 18
5.5 Accommodation of functional elements . 18
5.6 Interfaces . 19
5.6.1 Equipment interfaces and test interfaces . 19
5.6.2 Channels and links . 19
5.7 Dimensioning and configuring. 21
5.7.1 Distributors . 21
5.7.2 Redundancy . 21
5.7.3 External network interface . 22
5.7.4 Cables . 23
5.7.5 Equipment cords . 23
5.7.6 Patch cords and jumpers . 23
5.7.7 Equipment outlets . 23
5.7.8 LDP . 23

5.7.9 Building entrance facilities . 24
5.8 Earthing and equipotential bonding . 24
6 Channel performance . 24
6.1 General . 24
6.2 Transmission performance . 25
6.2.1 General . 25
6.2.2 Balanced cabling . 25
6.2.3 Optical fibre cabling . 25
7 Reference implementations . 25
7.1 General . 25
7.2 Balanced cabling . 26
7.2.1 Assumptions . 26
7.2.2 Zone distribution cabling . 26
7.2.3 Main distribution cabling . 29

+AMD1:2014 CSV  ISO/IEC 2014
7.2.4 Network access cabling . 31

7.3 Optical fibre cabling . 33

7.3.1 Assumptions . 33

7.3.2 Component choice . 33

7.3.3 Optical fibre cabling channel lengths . 33

8 Cable requirements . 34

8.1 General . 34

8.2 Balanced cables . 34

8.3 Optical fibre cables. 34

9 Connecting hardware requirements . 34
9.1 General requirements . 34
9.1.1 Overview . 34
9.1.2 Applicability . 34
9.1.3 Location . 34
9.1.4 Design . 34
9.1.5 Operating environment . 34
9.1.6 Mounting . 34
9.1.7 Installation practices . 35
9.1.8 Marking and colour coding . 35
9.2 Connecting hardware for balanced cabling . 35
9.2.1 General requirements . 35
9.2.2 Performance marking . 35
9.2.3 Mechanical characteristics . 35
9.3 Connecting hardware for optical fibre cabling . 38
9.3.1 General requirements . 38
9.3.2 ENI requirements. 38
9.3.3 EO requirements . 38
9.3.4 Optical fibre assignments at the EO . 38
9.3.5 Other connecting hardware . 39
10 Requirements for cords and jumpers . 40
10.1 Jumpers . 40
10.2 Balanced cords . 40
10.3 Optical fibre cords . 40
Annex A (normative) Link performance limits . 41
A.1 General . 41
A.2 Balanced cabling . 42
A.3 Optical fibre cabling . 43
Annex B (informative) Usage of high density connecting hardware within optical fibre
cabling . 44
B.1  General . 44
B.2  Structure of cabling subsystems . 44
Annex C (normative) Intermediate distribution cabling subsystem . 47
C.1 General . 47
C.2 General structure and hierarchy . 47
C.2.1 General . 47
C.3 Cabling subsystems .
...