ISO/IEC 24764:2010
(Main)Information technology — Generic cabling systems for data centres
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.
Technologies de l'information — Systèmes de câblage générique des centres de données
General Information
Relations
Standards Content (Sample)
ISO/IEC 24764
Edition 1.0 2010-04
INTERNATIONAL
STANDARD
Information technology – Generic cabling systems for data centres
ISO/IEC 24764:2010(E)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2010 ISO/IEC, Geneva, Switzerland
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
3, rue de Varembé
CH-1211 Geneva 20
Switzerland
Email: inmail@iec.ch
Web: 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.
ƒ Catalogue of IEC publications: www.iec.ch/searchpub
The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,…).
It also gives information on projects, withdrawn and replaced publications.
ƒ IEC Just Published: www.iec.ch/online_news/justpub
Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available
on-line and also by email.
ƒ Electropedia: www.electropedia.org
The world's leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions
in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical
Vocabulary online.
ƒ Customer Service Centre: www.iec.ch/webstore/custserv
If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service
Centre FAQ or contact us:
Email: csc@iec.ch
Tel.: +41 22 919 02 11
Fax: +41 22 919 03 00
---------------------- Page: 2 ----------------------
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
---------------------- Page: 3 ----------------------
– 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
---------------------- Page: 4 ----------------------
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
---------------------- Page: 5 ----------------------
– 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 of fixed connector.36
Figure A.1 – Link options .39
Figure B.1 – Examples of high density connecting hardware within main distribution
cabling.42
Figure B.2 – Examples of high density connecting hardware at the LDP and EO within
zone distribution cabling .43
Table 1 – Zone distribution cabling – length assumptions for balanced cabling .25
Table 2 – Zone distribution channel length equations.26
Table 3 – Main distribution cabling – Length assumptions for balanced cabling .27
Table 4 – Main distribution channel length equations .28
Table 5 – Network access cabling channel equations.30
Table 6 – Connecting hardware of the type used at the ENI .32
Table 7 – Connecting hardware of the type used at the EO.33
---------------------- Page: 6 ----------------------
24764 © ISO/IEC:2010(E) – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
______________
INFORMATION TECHNOLOGY –
GENERIC CABLING SYSTEMS FOR DATA CENTRES
FOREWORD
1) ISO (International Organization for Standardization) and IEC (International Electrotechnical Commission) form the
specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in
the development of International Standards. Their preparation is entrusted to technical committees; any ISO and
IEC member body interested in the subject dealt with may participate in this preparatory work. International
governmental and non-governmental organizations liaising with ISO and IEC also participate in this preparation.
2) In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1.
Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote.
3) The formal decisions or agreements of IEC and ISO 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 and ISO member bodies.
4) IEC, ISO and ISO/IEC publications have the form of recommendations for international use and are accepted
by IEC and ISO member bodies in that sense. While all reasonable efforts are made to ensure that the
technical content of IEC, ISO and ISO/IEC publications is accurate, IEC or ISO cannot be held responsible for
the way in which they are used or for any misinterpretation by any end user.
5) In order to promote international uniformity, IEC and ISO member bodies undertake to apply IEC, ISO and
ISO/IEC publications transparently to the maximum extent possible in their national and regional publications.
Any divergence between any ISO/IEC publication and the corresponding national or regional publication
should be clearly indicated in the latter.
6) ISO and IEC provide no marking procedure to indicate their approval and cannot be rendered responsible for
any equipment declared to be in conformity with an ISO/IEC Publication.
7) All users should ensure that they have the latest edition of this publication.
8) No liability shall attach to IEC or ISO or its directors, employees, servants or agents including individual experts
and members of their technical committees and IEC or ISO member bodies 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 of, use of, or reliance upon, this ISO/IEC publication or any other IEC,
ISO or ISO/IEC publications.
9) 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.
10) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of
patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
International Standard ISO/IEC 24764 was prepared by subcommittee 25: Interconnection of
information technology equipment, of ISO/IEC joint technical committee 1: Information
technology.
ISO/IEC 24764 is to be read in conjunction with International Standard ISO/IEC 11801:2002,
its Amendment 1 (2008) and Amendment 2 (2010).
This International Standard has been approved by vote of the member bodies, and the voting
results may be obtained from the address given on the second title page.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
---------------------- Page: 7 ----------------------
– 6 – 24764 © ISO/IEC:2010(E)
INTRODUCTION
Within premises, the importance of the information technology cabling infrastructure is similar
to that of other fundamental building utilities such as heating, lighting and mains power. As
with other utilities, interruptions to service can have serious impact. Poor quality of service
due to lack of design foresight, use of inappropriate components, incorrect installation, poor
administration or inadequate support can threaten an organisation's effectiveness.
Cabling within data centres comprises both application-specific and multipurpose networks
that are mission-critical. Generic cabling designs in accordance with ISO/IEC 11801 have
supported the development of high data rate applications based upon a defined cabling
model. This International standard recognizes the benefit of generic cabling to provision
multiple services and to connect large quantities of equipment within the limited space of data
centre premises, and is to be used in conjunction with ISO/IEC 11801.
This International Standard provides:
a) data centre users with an application independent generic cabling system capable of
supporting a wide range of applications;
b) data centre users with a flexible cabling scheme such that modifications are both easy and
economical;
c) data centre professionals (for example, data centre architects) with guidance allowing the
accommodation of cabling before specific requirements are known; that is, in the initial
planning either for construction or refurbishment;
d) industry and applications standardization bodies with a cabling system which supports
current products and provides a basis for future product development.
This International Standard specifies multi-vendor cabling, and is related to:
• the associated standard covering general requirements for generic cabling within premises
(ISO/IEC 11801);
• standards for cabling components developed by technical committees of the IEC;
• standards for the quality assurance, installation and administration of information
1
technology cabling (ISO/IEC 14763-2 ) and testing of installed cabling (IEC 61935-1 and
ISO/IEC 14763-3);
• applications developed by the technical committees of IEC, subcommittees of
2
ISO/IEC JTC 1 and study groups of ITU-T .
It is anticipated that the generic cabling system meeting the requirements of this International
Standard will have a life expectancy of up to ten years.
This International Standard has taken into account requirements specified in application
standards listed in Annex F of ISO/IEC 11801:2002 and Amendment 2 (2010). It refers to
International Standards for components and test methods whenever appropriate International
Standards are available.
___________
1
Until ISO/IEC 14763-2 is published, relevant information may be found in ISO/IEC 18010.
2
International Telecommunication Union – Telecommunications Standardization Sector.
---------------------- Page: 8 ----------------------
24764 © ISO/IEC:2010(E) – 7 –
Figure 1 shows the schematic and contextual relationships between the standards produced
by ISO/IEC JTC 1/SC 25 for information technology cabling, namely this and other generic
3
cabling design standards (ISO/IEC 11801), cabling installation standards (ISO/IEC 14763-2 ),
testing of installed cabling (IEC 61935-1 and ISO/IEC 14763-3).
ISISO/O/IECIEC 24724764: In64: Inffoorrmmaattiion tecon technohnollooggyy::
GeGenenerriic cac cabblliinng syg syststeemms s foforr Da Dattaa
CCententresres
IEC IEC 61961935-35-1: G1: Genereneriicc c caabblliinngg s syyssttememss:
ISOISO/IE/IEC 1C 118011801: Inf: Infoormrmatiatioon tecn techhnnoollooggyy: : ISOISO/IEC/IEC 14 14763763-2:-2: Info Inforrmmatiation on
SpecSpeciiffiiccaattiionsons ffoorr th the teste testiing ofng of
GGeneeneriricc ca cablbliing fng foor cusr custtomeomerr p prrememiisseses tectechnohnollooggyy.: Q Qualualiitty asy asssuurarancnce, e,
balbalananceced cd coommmmuniuniccaatitionon cabl cabliinngg
iinnststalalllaattiion aon and and addmmiininissttraratitioonn
ISOISO//IIEEC C 180118010: I0: Innffoormrmaattiion teon techchnolnolooggyy. . :
ISISOO/IE/IECC 14 14763763-3: -3: InInffoorrmmaattion ion
PaPathwathwayyss an and sd spacpaceses fo for cur custstoommerer
tteechchnnoollogyogy: Te: Teststiinng og off op opttiiccaall fi fibbrree
prprememiisseses c cablabliinngg
cacabblinlingg
IEIECC 60 60336644--11:: E Ellececttrriiccalal i innssttalalllaattiionons os off
bbuuiillddiingsngs: F: Fundundaammenenttaall priprinncciiplpleses, ,
aasssseessmssmenent t ofof ge generneralal c characharacteteririssttiicscs,,
ddeeffiininititionsons
Scheme of the relationship between cabling standards such as ISO/IEC 11801 and other
standards relevant for information technology cabling systems.
Figure 1 – Relationship between generic cabling standards
___________
3
Until ISO/IEC 14763-2 is published, relevant information may be found in ISO/IEC 18010.
---------------------- Page: 9 ----------------------
– 8 – 24764 © ISO/IEC:2010(E)
INFORMATION TECHNOLOGY –
GENERIC CABLING SYSTEMS FOR DATA CENTRES
1 Scope
This International Standard 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.
This International Standard is based upon and references the requirements of ISO/IEC 11801.
This International Standard 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. The principles of this International Standard may also be applied to
data centre installations that do not fall within this range.
In addition to the requirements of ISO/IEC 11801, this International Standard specifies:
a) a modified structure and configuration for generic cabling within data centres used to
support existing and emerging applications;
b) a reference implementation specific to data centre infrastructures.
Data centres have specific pathway and space requirements that are specified in
ISO/IEC 14763-2. Until ISO/IEC 14763-2 is published, relevant information may be found in
ISO/IEC 18010 (see Bibliography).
Safety (electrical safety and protection, fire, optical power etc.) and electromagnetic
compatibility (EMC) requirements are outside the scope of this International Standard and are
covered by other standards and regulations. However, information given in this International
Figure 1 can be of assistance in meeting these other
Standard and those identified in
standards and regulations.
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.
ISO/IEC 11801 2002, Information technology – Generic cabling for customer premises
Amendment 1(2008)
Amendment 2(2010).
ISO/IEC 14763-3, Information technology – Implementation and operation of customer
premises cabling – Part 3: Testing of optical fibre cabling
IEC 60603-7 (all parts), Connectors for electronic equipment – Part 7: Detail specification for
8-way, unshielded, free and fixed connectors
---------------------- Page: 10 ----------------------
24764 © ISO/IEC:2010(E) – 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
4
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
5
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
6
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
7
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 transmissions with frequencies up to
8
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
9
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
10
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
11
1 000 MHz
IEC 60794-2-11, Optical fibre cables – Part 2-11: Indoor cables – Detailed specification for
simplex and duplex cables for use in premises cabling
IEC 60874-19-1, Fibre optic interconnecting devices and passive components Connectors
for optical fibres and cables – Part 19-1: Fibre optic patch cord connector type SC-PC
(floating duplex) standard terminated on multimode fibre type A1a, A1b – Detail specification
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 1 000 MHz
___________
4
Second edition in preparation.
5
Second edition in preparation.
6
Second edition in preparation
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.