ISO/IEC 24764:2010/Amd 1:2014
(Amendment)Information technology — Generic cabling systems for data centres — Amendment 1
Information technology — Generic cabling systems for data centres — Amendment 1
Technologies de l'information — Systèmes de câblage générique des centres de données — Amendement 1
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ISO/IEC 24764
Edition 1.0 2014-04
INTERNATIONAL
STANDARD
AMENDMENT 1
Information technology – Generic cabling systems for data centres
ISO/IEC 24764:2010-04/AMD1:2014-04(en)
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ISO/IEC 24764
Edition 1.0 2014-04
INTERNATIONAL
STANDARD
AMENDMENT 1
Information technology – Generic cabling systems for data centres
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
B
ICS 35.200 ISBN 978-2-8891-0836-7
Warning! Make sure that you obtained this publication from an authorized distributor.
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– 2 – ISO/IEC 24764:2010/AMD1:2014
© ISO/IEC 2014
FOREWORD
Amendment 1 to International Standard ISO/IEC 24764 was prepared by
subcommittee 25: Interconnection of information technology equipment, of ISO/IEC
joint technical committee 1: Information technology.
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.
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ISO/IEC 24764:2010/AMD1:2014 – 3 –
© ISO/IEC 2014
Add, to the table of contents, the following new entries:
CONTENTS
INTRODUCTION to Amendment 1 . 4
Annex C (normative) Intermediate distribution cabling subsystem . 7
C.1 General . 7
C.2 General structure and hierarchy . 7
C.2.1 General. 7
C.3 Cabling subsystems . 8
C.3.1 Main distribution cabling subsystem . 8
C.3.2 Intermediate distribution cabling subsystem . 8
C.3.3 Redundancy . 8
C.4 Transmission performance . 9
C.4.1 Balanced cabling . 9
C.4.2 Optical fibre cabling . 10
C.5 Reference implementations . 10
C.5.1 Main distribution cabling . 10
C.5.2 Intermediate distribution cabling . 12
Annex D (informative) Combination of balanced cabling permanent links . 15
D.1 General . 15
D.2 Requirements . 15
Figure C.1 – Structure of generic cabling within a data centre . 7
Figure C.2 – Hierarchical structure of generic cabling within a data centre . 8
Figure C.3 – Connection of functional elements providing redundancy . 9
Figure C.4 – Main distribution cabling models . 10
Figure C.5 – Intermediate distribution cabling models . 12
Figure D.1 – Examples of combined permanent links . 15
Table C.1 – Length assumptions used in the mathematical modelling of balanced main
distribution cabling . 11
Table C.2 – Main distribution channel length equations . 11
Table C.3 – Length assumptions used in the mathematical modelling of balanced
intermediate distribution cabling . 13
Table C.4 – Intermediate distribution channel length equations . 13
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– 4 – ISO/IEC 24764:2010/AMD1:2014
© ISO/IEC 2014
Add, at the end of the existing introduction, after Figure 1, the following text:
INTRODUCTION to Amendment 1
Amendment 1 of ISO/IEC 24764:2010 provides an introduction to the intermediate cabling
subsystem and an explanatory annex for the combination of several permanent links to form a
single transmission channel.
2 Normative references
Add, in the list of normative references, after reference ISO/IEC 11801, the following reference:
ISO/IEC 14763-2, Information technology – Implementation and operation of customer
premises cabling – Part 2: Planning and installation
3.1 Terms and definitions
Add, at the end of this subclause, the following new definitions:
3.1.13
equipment cord
cord connecting equipment to the equipment interfaces of generic cabling
3.1.14
equipment outlet
fixed connecting device for terminating the zone distribution cabling and providing the interface
to the equipment cord
3.1.15
intermediate distribution cable
cable connecting the intermediate distributor to the zone distributor
3.1.16
intermediate distributor
distributor used to make connections between the main distribution cabling subsystem,
intermediate distribution cabling subsystem, network access cabling subsystem and cabling
subsystems specified in ISO/IEC 11801 and active equipment
3.2 Abbreviations
Add, after the entry EO Equipment Outlet, the following new abbreviation:
ID Intermediate Distributor
ILD Insertion Loss Deviation
5 Structure of the generic cabling system
5.2 Functional elements
Add, after item i), the following new NOTE:
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ISO/IEC 24764:2010/AMD1:2014 – 5 –
© ISO/IEC 2014
NOTE This standard includes additional functional elements, the intermediate distributor and the intermediate
distribution cable. The requirements for these functional elements are defined in Annex C.
5.3 General structure and hierarchy
Replace the entire third paragraph by the following new paragraph and NOTE:
The functions of multiple distributors may be combined, see 5.7.1.
NOTE This standard includes an additional cabling subsystem: the intermediate cabling subsystem. The
requirements for this additional cabling subsystem and the modifications to the cabling subsystems of this clause
are defined in Annex C.
Replace the existing Figure 2 by the following Figure:
EOEO
ENENII MDMD ZZDD LDLDPP
EQEQEQEQPPPP
DDiissttrriibutbutoror
iin acn acccorordancdancee
wwiitth Ih ISSOO//IIEECC 11801 11801 NNetetwwororkk ZZone dione dissttrriibutbutiionon EEquiquipmpmentent
MaiMain dn diissttrriibutbutiionon
aacceccesss s ccablabliing sng subsubsyyssttemem ccorordd
ccablabliingng
ccablabliingng
ssubsubsyyssttemem
ssubsubsyyssttemem
GGenereneriicc c cablabliing sng syyssttemem
5.6 Interfaces
5.6.2 Channels and links
Replace the existing second and third paragraphs by the following:
The channel is the transmission path between data centre equipment such as switches and
servers (EQP in Figure 5). A typical channel in a data centre would consist of the zone
distribution cabling subsystem together with an equipment cord at each end. For longer reach
services, the channel would be formed by the connection of two or more subsystems (including
patch cords and equipment cords), see Annex D. The performance of the channel excludes the
connections at the application-specific equipment.
The permanent link is the transmission path of the fixed cabling subsystem, including the
connecting hardware at the ends of the installed cable. In a data centre zone distribution
cabling subsystem, the permanent link consists of the EO, an optional LDP cable, an optional
LDP, the zone distribution cable and the termination of the zone distribution cable at the zone
distributor. The permanent link includes the connections at the ends of the installed cabling.
6 Channel performance
6.1 General
Replace the third paragraph including bulleted list by:
Channels are implemented using either:
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– 6 – ISO/IEC 24764:2010/AMD1:2014
© ISO/IEC 2014
• network access cabling only;
• main distribution cabling only;
• zone distribution cabling only;
• a combination of the above, see Annex D.
Add, after Annex B, the following new Annexes C and D, and move the existing Bibliography
after these new Annexes:
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ISO/IEC 24764:2010/AMD1:2014 – 7 –
© ISO/IEC 2014
Annex C
(normative)
Intermediate distribution cabling subsystem
C.1 General
Depending on the size and/or complexity of the data centres, it may require an additional
subsystem in order to allow for the connection of several zone distributors. In such cases, the
main distributor connects several intermediate distributors, each of which acts as local main
distributors.
This annex will describe the additional requirements that ar
...
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