ISO/IEC FDIS 22237-5

• Abstract:

  ISO/IEC TS 22237-5:2018 addresses the wide range of telecommunications cabling infrastructures within data centres based upon the criteria and classifications for "availability" within ISO/IEC TS 22237‑1. ISO/IEC TS 22237-5:2018 specifies requirements and recommendations for the following: a) information technology and network telecommunications cabling (e.g. SAN and LAN); b) general information technology cabling to support the operation of the data centre; c) telecommunications cabling to monitor and control, as appropriate, power distribution, environmental control and physical security of the data centre; d) other building automation cabling; e) pathways, spaces and enclosures for the telecommunications cabling infrastructures. Safety and electromagnetic compatibility (EMC) requirements are outside the scope of this document and are covered by other standards and regulations. However, information given in this document may be of assistance in meeting these standards and regulations.

• Status: Not Published
• ICS: 35.020 - Information technology (IT) in general
• ICS: 35.200 - Interface and interconnection equipment
• Technical Committee: ISO/IEC JTC 1/SC 39 - Sustainability, IT and data centres
• Drafting Committee: ISO/IEC JTC 1/SC 39/WG 3 - Sustainable facilities and infrastructures
• Current Stage: 5000 - FDIS registered for formal approval
• Start Date: 12-May-2026
• Completion Date: 19-Mar-2026

• Revises: ISO/IEC TS 22237-5:2018 - Information technology — Data centre facilities and infrastructures — Part 5: Telecommunications cabling infrastructure
• Effective Date: 23-Dec-2023

Overview

ISO/IEC FDIS 22237-5 sets out the requirements and recommendations for the design, implementation, and management of telecommunications cabling infrastructure in data centres. As part of the ISO/IEC 22237 series on data centre facilities and infrastructures, this standard provides a framework to ensure robust, flexible, and scalable network connectivity within data centre environments by addressing key areas such as structured cabling for IT services, distributed building services, pathways, spaces, and enclosures.

The standard prioritizes the availability and resilience of telecommunications cabling, defining classifications and criteria that align with overall data centre availability goals. It supports various data centre operational requirements, including physical security and clear provisions for colocation and enterprise environments. While ISO/IEC FDIS 22237-5 does not cover safety and electromagnetic compatibility (EMC) directly, it offers guidance that can assist compliance with other applicable regulations.

Key Topics

• Structured Cabling for IT and Network Services

  • Establishes requirements for storage area network (SAN), local area network (LAN), and general IT operations within all data centre spaces.
  • Supports both fixed and point-to-point cabling topologies for critical connectivity.

• Cabling for Building Services and Automation

  • Defines telecommunications cabling to support building management, including power distribution monitoring, environmental controls, and physical security systems.
  • Considers integration of other building service cables.

• Pathways, Spaces, and Enclosures

  • Specifies requirements for pathways, spaces, and enclosures to ensure proper accommodation and protection for telecommunications cabling.
  • Addresses cabinet, rack, and frame considerations for computer room spaces.

• Availability Classes

  • Introduces a graduated classification of cabling infrastructure availability aligned with ISO/IEC 22237-1, helping stakeholders match cabling design to operational resilience goals.

• Physical Security

  • Recommends best practices for protecting cabling infrastructure from unauthorized access and internal threats.

• Management and Operational Guidelines

  • Provides guidance for ongoing management, maintenance, and use of automated infrastructure management (AIM) systems.

Applications

ISO/IEC FDIS 22237-5 is relevant to a wide range of stakeholders involved in data centre design, construction, operation, and management:

• Architects and Engineers: Use the standard to ensure new data centres or upgrades provide sufficient and compliant telecommunications cabling, supporting both current and future needs.
• Data Centre Operators: Achieve operational availability targets by aligning cabling layouts with the standard’s availability classes and management recommendations.
• Facility Managers & ICT Managers: Benefit from integrated cabling infrastructure that supports IT operations, building automation, and security requirements.
• Consultants and Designers: Reference criteria and design concepts outlined for various types of data centres, from enterprise environments to colocation and network operator facilities.
• Installers and Maintenance Teams: Apply best practices for pathways, rack selection, physical security, and documentation to deliver reliable, manageable cabling infrastructure.

The standard is applicable to all data centre types, including permanent, temporary, mobile, and multi-building or multi-floor installations. It supports both new builds and major retrofit projects.

Related Standards

ISO/IEC FDIS 22237-5 is closely linked with several other international standards and technical documents:

• ISO/IEC 22237-1: General concepts for data centre availability, physical security, and energy efficiency.
• ISO/IEC 11801-5: Generic cabling for customer premises - data centres, referenced for cabling implementation details.
• ISO/IEC 22237 series (Parts 2-7): Covers other aspects of data centre infrastructure, including building construction, power distribution, security, and management.
• ISO/IEC TS 22237-31: Addresses resilience, dependability, and fault tolerance.

Data centre owners and designers should consult these related standards to ensure a comprehensive and fully compliant approach to infrastructure development and operation.

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Keywords: ISO/IEC FDIS 22237-5, data centre cabling, telecommunications infrastructure, structured cabling, data centre standards, network cabling, data centre availability, colocation, ISO data centre, IT infrastructure standards, cabling management.

FINAL DRAFT
International
Standard
ISO/IEC
FDIS
22237-5
ISO/IEC JTC 1/SC 39
Information technology —
Secretariat: ANSI
Data centre facilities and
Voting begins on:
infrastructures —
2026-09-30
Part 5:
Voting terminates on:
2026-11-25
Telecommunications cabling
infrastructure
Technologie de l’information — Installation et infrastructures de
centres de traitement de données —
Partie 5: Infrastructure du câblage dédié télécommunications
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
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BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
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INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
ISO/IEC FDIS 22237­5:2026(en) © ISO/IEC 2026

FINAL DRAFT
International
Standard
ISO/IEC
FDIS
22237-5
ISO/IEC JTC 1/SC 39
Information technology —
Secretariat: ANSI
Data centre facilities and
Voting begins on:
infrastructures —
Part 5:
Voting terminates on:
Telecommunications cabling
infrastructure
Technologie de l’information — Installation et infrastructures de
centres de traitement de données —
Partie 5: Infrastructure du câblage dédié télécommunications
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO/IEC 2026
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
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INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
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TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
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ISO/IEC FDIS 22237­5:2026(en) © ISO/IEC 2026

© ISO/IEC 2026 – All rights reserved
ii
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and abbreviated terms . 2
3.1 Terms and definitions .2
3.2 Abbreviated terms .6
4 Conformance . 7
5 Telecommunications cabling within the data centre . 8
5.1 General .8
5.2 Requirements for cabling supporting the IT operations in all data centre spaces .8
5.3 Requirements for cabling providing distributed building services in all data centre
spaces .8
5.4 Requirements for cabling for ICT services to and within the computer room space .9
5.4.1 General .9
5.4.2 Point-to-point cabling .9
5.4.3 Requirements for fixed cabling .11
6 Implementation of cabling in accordance with ISO/IEC 11801-5 .13
6.1 General . 13
6.2 Functional elements. 13
6.3 Distribution areas and spaces .14
6.3.1 General .14
6.3.2 Distribution areas . 15
6.3.3 Building entrance facility (BEF) .17
6.3.4 Entrance rooms (ERs).17
6.4 Infrastructures supporting the functional elements of ISO/IEC 11801-5 .18
6.4.1 General .18
6.4.2 Pathways and pathway systems for telecommunications cabling .18
6.4.3 Cabinets, frames and racks (CFRs) for the computer room space.19
7 Physical security .20
7.1 General . 20
7.2 Protection against unauthorized access .21
7.2.1 Pathways and spaces .21
7.2.2 Entrance room (ER) .21
7.3 Protection against internal events .21
8 Availability classification for the telecommunications cabling infrastructure,
infrastructure elements, facilities and spaces .21
8.1 General .21
8.2 Availability design principles for telecommunications cabling infrastructure . 22
8.3 Overview about the Availability Classes for telecommunications cabling . 22
8.3.1 General . 22
8.3.2 Standalone special purpose IT systems . 23
8.4 Availability Class design requirements and recommendations . 23
8.4.1 Transmission channel design for the network distribution cabling . 23
8.4.2 Availability Class 1 .24
8.4.3 Availability Class 2 . 25
8.4.4 Availability Class 3 . 28
8.4.5 Availability Class 4 .31
9 Management and operation of the telecommunications cabling infrastructure .33
9.1 General . 33
9.2 Automated infrastructure management systems . 33

© ISO/IEC 2026 – All rights reserved
iii
Annex A (informative) Design concepts for network distribution cabling .34
Annex B (informative) Energy efficiency considerations for the telecommunications cabling
infrastructure .42
Annex C (informative) Summary of requirements .43
Annex D (informative) Examples of telecommunications cabling infrastructures including
active equipment .45
Annex E (informative) Availability description .49
Annex F (normative) Availability Classes for cabling infrastructures in colocation data centres .50
Annex G (informative) Integration of standalone IT systems in data centres.54
Bibliography .57

© ISO/IEC 2026 – All rights reserved
iv
Foreword
ISO (the International Organization for Standardization) and IEC (the 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 through technical
committees established by the respective organization to deal with particular fields of technical activity.
ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations,
governmental and non-governmental, in liaison with ISO and IEC, also take part in the work.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of document should be noted. This document was drafted in accordance with the editorial rules of the ISO/
IEC Directives, Part 2 (see www.iso.org/directives or www.iec.ch/members_experts/refdocs).
ISO and IEC draw attention to the possibility that the implementation of this document may involve the
use of (a) patent(s). ISO and IEC take no position concerning the evidence, validity or applicability of any
claimed patent rights in respect thereof. As of the date of publication of this document, ISO and IEC had not
received notice of (a) patent(s) which may be required to implement this document. However, implementers
are cautioned that this may not represent the latest information, which may be obtained from the patent
database available at www.iso.org/patents and https://patents.iec.ch. ISO and IEC shall not be held
responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www.iso.org/iso/foreword.html.
In the IEC, see www.iec.ch/understanding-standards.
This document was prepared by Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee
SC 39, Sustainability, IT and data centres.
This first edition cancels and replaces ISO/IEC TS 22237-5:2018, which has been technically revised.
The main changes are as follows:
— the document structure has been completely revised;
— the Availability Classes have been revised;
— a clause on physical security has been added (Clause 7);
— Annex C summarizing the requirements and recommendations of the document has been added;
— Annex D with examples for cabling infrastructures including the location of active equipment has been
added;
— Annex E with an availability description has been added;
— Annex F with specific requirements for colocation data centres has been added.
A list of all parts in the ISO/IEC 22237 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body.
A complete listing of these bodies can be found at www.iso.org/members.html.

© ISO/IEC 2026 – All rights reserved
v
Introduction
The unrestricted access to internet-based information demanded by the information society has led to
an exponential growth of both internet traffic and the volume of stored/retrieved data. Data centres are
housing and supporting the information technology and network telecommunications equipment for data
processing, data storage and data transport. They are required both by network operators (delivering those
services to customer premises) and by enterprises within those customer premises.
Data centres need to provide modular, scalable and flexible facilities and infrastructures to easily
accommodate the rapidly changing requirements of the market. In addition, energy consumption of data
centres has become critical, both from an environmental point of view (reduction of carbon footprint) and
with respect to economic considerations (cost of energy) for the data centre operator.
The implementation of data centres varies in terms of:
— purpose (enterprise, co-location, co-hosting or network operator facilities);
— security level;
— physical size;
— accommodation (mobile, temporary and permanent constructions).
NOTE Cloud services can be provided by all data centre types mentioned.
The needs of data centres also vary in terms of availability of service, the provision of security and the
objectives for energy efficiency. These needs and objectives influence the design of data centres in terms of
building construction, power distribution, environmental control, telecommunications cabling and physical
security. Effective management and operational information is required to monitor achievement of the
defined needs and objectives.
The ISO/IEC 22237 series specifies requirements and recommendations to support the various parties
involved in the design, planning, procurement, integration, installation, operation and maintenance of
facilities and infrastructures within data centres. These parties include:
— owners, operators, facility managers, ICT managers, project managers, main contractors;
— consultants, architects, building designers and builders, system or installation designers, auditors, test
and commissioning agents;
— suppliers of equipment;
— installers, maintainers.
The inter-relationship of the documents within the ISO/IEC 22237 series is shown in Figure 1.

© ISO/IEC 2026 – All rights reserved
vi
Figure 1 — Schematic relationship between the ISO/IEC 22237 series of documents
ISO/IEC 22237-2 ISO/IEC 22237-3, ISO/IEC 22237-4, this document and ISO/IEC 22237-6 specify requirements
and recommendations for particular facilities and infrastructures to support the relevant classification for
“availability”, “physical security” and “energy efficiency enablement” selected from ISO/IEC 22237−1.
This document addresses the specific requirements for the telecommunications cabling infrastructure
in data centres used for the purpose of IT networking and building services in accordance with the
requirements of ISO/IEC 22237−1.
ISO/IEC TS 22237-7 addresses the operational and management information (in accordance with the
requirements of ISO/IEC 22237-1.
ISO/IEC TS 22237-31 addresses resilience attributes, including dependability and fault tolerance metrics.
This document is intended for use by and collaboration between architects, building designers, builders and
system and installation designers.
The ISO/IEC 22237 series does not address the selection of information technology and network
telecommunications equipment, software and associated configuration issues.
Figure 2 shows the schematic and contextual relationships of ISO/IEC 22237-5 with other cabling and cabling
installation related standards.

© ISO/IEC 2026 – All rights reserved
vii
Figure 2 — Schematic relationship between ISO/IEC 22237-5 and other cabling design and
installation standards
The importance of the information technology and network telecommunications cabling infrastructure
is similar to that of other infrastructures such as environmental control, power distribution and security
systems. As with other utilities, interruptions to service can have a serious impact. Poor quality of service
due to lack of planning, use of inappropriate components, incorrect installation, poor administration or
inadequate support can threaten an organization's effectiveness.

© ISO/IEC 2026 – All rights reserved
viii
FINAL DRAFT International Standard ISO/IEC FDIS 22237-5:2026(en)
Information technology — Data centre facilities and
infrastructures —
Part 5:
Telecommunications cabling infrastructure
1 Scope
This document specifies design principles for information technology (IT) and network telecommunications
cabling (e.g. storage area network and local area network) in accordance with ISO/IEC 11801-5, based upon
the criteria and classifications for “availability” and “physical security” within ISO/IEC 22237-1.
This document applies to the telecommunications cabling infrastructures used in data centres. It describes:
a) for design, the application of generic cabling standards in the ISO/IEC 11801 series;
b) for installation specification, planning and practices and quality assurance, the application of
ISO/IEC 14763-2 (and related standards).
In addition, this document specifies requirements and recommendations for the following:
— general IT cabling to support the IT operation of the data centre;
— telecommunications cabling to monitor and control, as appropriate, power distribution, environmental
control and physical security of the data centre;
— other building automation cabling;
— pathways, pathway systems, spaces and enclosures for the telecommunications cabling infrastructures.
Safety and electromagnetic compatibility (EMC) requirements are outside the scope of this document and
are covered by other standards and regulations. However, information given in this document can be of
assistance in meeting these standards and regulations.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements 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 11801-2, Information technology — Generic cabling for customer premises — Part 2: Office premises
ISO/IEC 11801-5, Information technology — Generic cabling for customer premises — Part 5: Data centres
ISO/IEC 11801-6, Information technology — Generic cabling for customer premises — Part 6: Distributed
building services
ISO/IEC 14763-2, Information technology — Implementation and operation of customer premises cabling —
Part 2: Planning and installation
ISO/IEC 22237-1, Information technology — Data centre facilities and infrastructures — Part 1: General
concepts
© ISO/IEC 2026 – All rights reserved
ISO/IEC 22237-2, Information technology — Data centre facilities and infrastructures — Part 2: Building
construction
ISO/IEC 22237-3, Information technology — Data centre facilities and infrastructures — Part 3: Power
distribution
ISO/IEC 22237-4, Information technology — Data centre facilities and infrastructures — Part 4: Environmental
control
ISO/IEC 22237-6, Information technology — Data centre facilities and infrastructures — Part 6: Security
systems
ISO/IEC 30129, Information technology — Telecommunications bonding networks for buildings and other
structures
IEC 60332-1-2, Tests on electric and optical fibre cables under fire conditions - Part 1-2: Test for vertical flame
propagation for a single insulated wire or cable
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/IEC 22237-1 and the following
apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1.1
application-specific cabling
structured cabling with a configuration and performance which is considered to provide a specific benefit
for a single or limited number of applications, as compared to generic cabling
3.1.2
cabinet
self-supporting and floor mounted enclosed construction for housing closures and information technology
equipment
3.1.3
central patching location
passive cross-connect to connect different functional elements of a data centre
Note 1 to entry: A central patching location can be located in both the main distribution area and the intermediate
distribution area and is therefore a configuration either of a main distributor or an intermediate distributor according
to the cabling of ISO/IEC 11801-5.
3.1.4
cross-connect
passive connection between cabling subsystems using a patch cord or jumper
[SOURCE: ISO/IEC 11801-1:2017, 3.1.38]
3.1.5
customer space
part of a cabinet, a cabinet, a cage or a computer room in a colocation data centre that customers can rent to
host their information technology equipment

© ISO/IEC 2026 – All rights reserved
3.1.6
entrance room
space that houses the external telecommunications provider equipment and that provides the demarcation
points for the external telecommunications services
3.1.7
equipment outlet
fixed connecting device for terminating the zone distribution cabling and providing the interface to the
equipment cord
[SOURCE: ISO/IEC 11801-5:2017, 3.1.3]
3.1.8
equipment distribution area
area served by local distribution point(s) (LDP) and equipment outlet(s) (EO) of cabling and accommodating
the LDP(s), EO(s), servers, storage device and other networking equipment and their connections to the EO(s)
Note 1 to entry: Cabling is according to ISO/IEC 11801-5.
3.1.9
external network interface
termination point providing demarcation of external telecommunications service provision
[SOURCE: ISO/IEC 11801-1:2017, 3.1.44]
3.1.10
fixed cabling
cabling subsystem between closures which has either a peer-to-peer or hierarchical structure and which
enables the installation of cross-connects or interconnects at those closures
3.1.11
floor distributor
distributor used to connect between the horizontal cable and other cabling subsystems or equipment
3.1.12
floor distribution area
area accommodating the floor distributor(s) of cabling and associated transmission equipment
Note 1 to entry: Cabling is according to ISO/IEC 11801-2.
3.1.13
frame
open construction, typically self-supporting and floor-mounted, intended for housing closures and other
telecommunications equipment
[SOURCE: ISO/IEC 14763-2:2019, 3.1.15]
3.1.14
generic cabling
structured telecommunications cabling system, capable of supporting a wide range of standardized
applications
Note 1 to entry: Application-specific hardware is not a part of generic cabling.
Note 2 to entry: Generic cabling can be installed without prior knowledge of the required applications.
[SOURCE: ISO/IEC 11801-1:2017, 3.1.48, modified — Note 1 to entry and Note 2 to entry have been added.]
3.1.15
information technology equipment
IT equipment
equipment designed for the purpose of:

© ISO/IEC 2026 – All rights reserved
a) receiving data from an external source (e.g. via network interface or via a keyboard);
b) performing processing and storage functions on the received data (e.g. computation, data transformation
or recording, filing, sorting, storage, transfer of data);
c) providing a data output (either to other equipment or by the reproduction of data);
d) data network transport;
3.1.16
interconnect
passive connection to a cabling subsystem not using a patch cord or jumper
[SOURCE: ISO/IEC 11801-1:2017, 3.1.54]
3.1.17
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 11801-1 and active equipment
[SOURCE: ISO/IEC 11801-5:2017, 3.1.6]
3.1.18
intermediate distribution area
area accommodating the intermediate distributor(s) of cabling and associated IT equipment
Note 1 to entry: Intermediate distributions areas (and intermediate distributors) are primarily used in larger data
centres to enable data centre growth or to provide segmentation for specific applications.
Note 2 to entry: Cabling is according to ISO/IEC 11801-5.
3.1.19
IT load
active equipment providing data transport services, data processing or data storage inside the data centre
3.1.20
jumper
cable, cable unit or cable element without connectors used for a cross-connections
[SOURCE: ISO/IEC 11801-1:2017, 3.1.57]
3.1.21
local distribution point
connection point in the zone distribution cabling subsystem between a zone distributor and an equipment
outlet
[SOURCE: ISO/IEC 11801-5:2017, 3.1.7]
3.1.22
main distributor
distributor used to make connections between the main distribution cabling subsystem, network access
cabling subsystem and cabling subsystems as specified in ISO/IEC 11801-1 and active equipment
Note 1 to entry: A central patching location located in a main distribution area is a specific configuration of a main
distributor according to the cabling of ISO/IEC 11801-5.
[SOURCE: ISO/IEC 11801-5:2017, 3.1.11, modified — Note 1 to entry has been added.]

© ISO/IEC 2026 – All rights reserved
3.1.23
main distribution area
area accommodating the main distributor(s) of cabling and associated transmission equipment
Note 1 to entry: A main distribution area can be in dedicated “main distributor space” or within the computer room of
the data centre.
Note 2 to entry: Cabling is according to ISO/IEC 11801-5.
3.1.24
meet-me-room
space in a colocation data centre which enables the interconnection either between data centre customer
spaces or between data centre customer spaces and telecommunications providers
3.1.25
pathway
defined route for cables between termination points
[SOURCE: ISO/IEC 14763-2:2019, 3.1.34]
3.1.26
pathway system
cable management system or other area or volume defined by markings or fittings used to either protect or
support the cabling in order that its desired performance is maintained
[SOURCE: ISO/IEC 14763-2:2019, 3.1.35]
3.1.27
point-to-point connection
direct connection of two pieces of IT equipment using a dedicated cable rather than a generic cabling system
3.1.28
premises entrance facility
facility that provides all necessary services, and which complies with all relevant regulations, for the entry
of specific infrastructures or services into premises
[SOURCE: ISO/IEC 22237-1:2021, 3.1.27]
3.1.29
rack
open construction, typically wall-mounted, for housing closures and other telecommunications equipment
[SOURCE: ISO/IEC 14763-2:2019, 3.1.41]
3.1.30
standalone IT system
IT system with a special purpose
Note 1 to entry: Examples are high performance computing clusters or AI clusters.
3.1.31
structured cabling
telecommunications cabling comprising fixed cables between points of distribution at which equipment or
other fixed cables can be connected
3.1.32
telecommunications provider
either an access provider or a service provider
Note 1 to entry: The term "service provider" is defined in ISO/IEC 14763-2:2019, 3.1.49.

© ISO/IEC 2026 – All rights reserved
3.1.33
zone distributor
distributor used to make connections between the main distribution cabling subsystem, intermediate
distribution cabling subsystem, zone distribution cabling subsystem, network access cabling subsystem,
cabling subsystems specified in ISO/IEC 11801-1 and active equipment
[SOURCE: ISO/IEC 11801-5:2017, 3.1.15]
3.1.34
zone distribution area
area accommodating the zone distributor(s) of cabling and associated transmission equipment
Note 1 to entry: Cabling is according to ISO/IEC 11801-5.
3.1.35
zone patching location
passive cross-connect to connect different functional elements of a data centre zone
Note 1 to entry: A zone patching location can be located in a zone distribution area and is therefore a specific
configuration of a zone distributor according to the cabling of ISO/IEC 11801-5.
3.2 Abbreviated terms
For the purposes of this document the following abbreviated terms apply:
BEF building entrance facility
BD building distributor
CD campus distributor
CFR cabinet/frame/rack
CPL central patching location
ENI external network interface
ER entrance room
EDA equipment distribution area
EO equipment outlet
EoR end of row
EQP transmission equipment
FDA floor distribution area
FD floor distributor
IDA intermediate distribution area
ID intermediate distributor
ICT information and communications technology
IT information technology
ITE information technology equipment
LAN local area network
© ISO/IEC 2026 – All rights reserved
LDP local distribution point
MDA main distribution area
MD main distributor
MMR meet-me-room
MoR middle of row
N/A not applicable
NOC network operating centre
SAN storage area network
SO service outlet
TE terminal equipment
ToR top of rack
ZDA zone distribution area
ZD zone distributor
ZPL zone patching location
4 Conformance
For a data centre to conform to this document:
a) Telecommunications cabling to support the IT operation of the data centre shall be in accordance with
Clause 5, Clause 6 and ISO/IEC 11801-2.
b) Telecommunications cabling for either monitoring or control of power distribution, environmental
control and physical security of the data centre shall be in accordance with Clause 5 and ISO/IEC 11801-6.
c) Telecommunications cabling for information technology (IT) and network telecommunications to and
within the computer room space of the data centre shall:
1) be in accordance with Clause 5;
2) be installed within an infrastructure, facilities and spaces meeting the requirements of Clause 6;
3) meet the physical security aspects of Clause 7 and ISO/IEC 22237-6;
4) have a design solution that meets the required Availability Class of Clause 8.
d) The installation specification, quality assurance (including documentation) of the cabling shall be in
accordance with ISO/IEC 14763-2 (subject to additional requirements of Clause 6 of this document).
e) Installation planning and practices of the cabling shall be in accordance with ISO/IEC 14763-2.
f) Telecommunications bonding networks for buildings and other structures shall be done in accordance
with ISO/IEC 30129.
g) The designer of the telecommunications cabling for IT and network telecommunications to and within
the computer room space of the data centre shall coordinate the cabling design with the data centre
network administrators regarding the network architecture, topology, physical locations and specific
interfaces required to be supported.

© ISO/IEC 2026 – All rights reserved
5 Telecommunications cabling within the data centre
5.1 General
This clause defines the requirements and recommendations for the performance, design criteria and
architectures for the different cabling types in a data centre.
The telecommunications cabling within the data centre serves to support the following:
a) data centre IT and network telecommunications;
b) monitoring and controlling of other data centre infrastructures;
c) building management and automation.
The design and planning of cabling infrastructures should be undertaken at an early stage of the data centre
design or refurbishment and should be integrated with the design and planning of:
— building construction;
— electrical power;
— environmental control systems;
— security systems;
— lighting systems;
— building management and automation systems.
5.2 Requirements for cabling supporting the IT operations in all data centre spaces
IT cabling to support the IT operations of the data centre in all data centre spaces shall be in accordance
with ISO/IEC 11801-2. The cabling infrastructure shall use a fixed cabling infrastructure (i.e. in accordance
with ISO/IEC 11801-2 or application-specific) in cabling subsystems in a single-path architecture.
Examples for spaces with IT operations are:
a) office space;
b) testing space;
c) network operating centre (NOC).
Cabling for the NOC shall have the same level of redundancy as the IT equipment (ITE) monitored or
controlled by the NOC. This document does not specify the redundancy requirements for the cabling in
office or test spaces.
In cases where data centre owners agree to the use of application-specific cabling because of advantages
compared with generic cabling, those application-specific cabling systems shall have a fixed and structured
cabling infrastructure approach in accordance with the cabling subsystem architecture of ISO/IEC 11801-2.
5.3 Requirements for cabling providing distributed building services in all data centre
spaces
ISO/IEC 11801-6 specifies generic cabling that supports a wide range of communication services within
premises. It reflects the increasing use of generic cabling in support of non-user specific services, including
the monitoring and control of data centre infrastructures. Many of these services require the use of remote
powered devices and include:
a) power distribution as described in ISO/IEC 22237-3, e.g. lighting, power distribution, incoming utility
metering;
© ISO/IEC 2026 – All rights reserved
b) environmental control as described in ISO/IEC 22237-4, e.g. temperature, humidity;
c) security management as described in ISO/IEC 22237-6, e.g. access control, cameras, motion/proximity
detectors, time and attendance monitoring.
The telecommunications cabling infrastructure for these purposes shall be in accordance with
ISO/IEC 11801-6 in all data centre spaces and shall use a fixed cabling infrastructure (i.e. according to
ISO/IEC 11801-6 or application-specific) in cabling subsystems. Any required redundancy should be
provided by the number of service outlets (SOs) provided throughout the data centre spaces.
In cases where data centre owners agree to the use of application-specific cabling because of advantages
compared with generic cabling, those application-specific cabling systems shall have a fixed and structured
cabling infrastructure approach in accordance with the cabling subsystem architecture of ISO/IEC 11801-6.
Cabling for the electrical power systems, environmental control systems and building management
and automation systems shall have the same level of redundancy as the electrical power systems and
environmental control systems. This document does not specify the redundancy requirements for
telecommunications cabling of security systems, lighting systems etc.
5.4 Requirements for cabling for ICT services to and within the computer room space
5.4.1 General
The cabling infrastructures to or within the computer room space of a data centre shall be appropriate to
provide networking and telecommunications capabilities and can comprise:
a) point-to-point cabling;
b) fixed cabling in accordance with ISO/IEC 11801-5;
c) fixed application-specific cabling.
The cabling infrastructure shall meet the design requirements for the chosen Availability Class in accordance
with Clause 8.
5.4.2 Point-to-point cabling
5.4.2.1 General
The point-to-point connection method uses cable assemblies (cords; typically factory-produced) that
directly connects between active equipment. Each cord connects a single port or a group of ports of one
device to a single port of another device or a group of devices.
Although point-to-point cabling seems to be the simplest and most cost-effective method of providing
connections, this cabling type should only be used for connections within the same or two adjacent cabinets,
frames and racks (CFRs) for the following reasons:
a) Point-to-point cabling has a limited lifetime because it is often not reusable when equipment either is
replaced or its location changes.
b) Continuous changes to the required interconnections increase both the planning and the operational
resources required for each change (see Figure 3).
c) Point-to-point cabling increases the risk of interfering with other infrastructures, including those for
environmental control.
© ISO/IEC 2026 – All rights reserved
a) Pre-change/addition
b) Post-change/addition
Key
storage
switch
server
1 additions
2 additions cables
Figure 3 — Impact of growth in an unstructured point-to-point cabling infrastructure

© ISO/IEC 2026 – All rights reserved
5.4.2.2 Requirements for point-to-point cabling
Where this document allows point-to-point cabling, it can be used subject to the following restrictions:
a) The mechanical performance of cords or cables used for point-to-point connections shall meet the
requirements of the installation environment (e.g. pathway systems).
b) Connectors on cords shall be protected against damage during installation, disconnection or removal.
c) Point-to-point connections shall only be used where the replacement of the cord following damage to
either connector can be performed without disruption to the data centre operation.
d) Cords shall be managed so as to avoid mechanical damage or accidental disconnection to adjacent
connections during insertion or removal.
e) Cords shall be labelled at both ends to show their origin and destination in accordance with the level 3
administration requirements of ISO/IEC 14763-2.
f) The impact of point-to-point connections on the fire load of cabling shall be assessed and mitigation
provided if necessary.
g) Cords providing point-to-point connections shall not be located where they restrict cooling airflow
towards active equipment.
5.4.3 Requirements for fixed cabling
5.4.3.1 General
Fixed cabling in the computer room space can be either a fixed cabling according to ISO/IEC 11801-5 or a
fixed application specific cabling.
5.4.3.2 Requirements for fixed cabling
A structured cabling system approach, illustrated in Figure 4, shows the equipment ports presented at
remote central patching locations (CPLs). Server-to-storage connections are made using short, easily
managed, patch cords within the CPL. The use of distributed zone patching locations (ZPLs), connected to
the CPLs with fixed cables provides additional flexibility for managing changes.
Figure 4 shows how a fixed cabling implementation grows over time. New equipment is connected to a CPL
or ZPL. The equipment can then be connected to the active systems by sim
...

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ISO/IEC JTC 1/SC 39/WG 3
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Secretariat: ANSI
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Date: 2026-05-0809-15
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Information technology — Data centre facilities and infrastructures — —
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Part 5:
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Telecommunications cabling infrastructure
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this publication may be reproduced or utilized otherwise in any form or by any means, electronic or
me3 chanical, including photocopying, or posting on the internet or an intranet, without prior written
permission. Permission can be requested from either ISO at the address below or ISO’s member body in the
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1 © ISO/IEC 2026
2 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be
3 reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the
4 internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO’s
5 member body in the country of the requester.
6 ISO copyright office
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9 Phone: + 41 22 749 01 11
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E-mail: [e-mail]
Website: www.iso.org
Published in Switzerland
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18 14 Contents
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19 Foreword . 5
20 Introduction . 11
21 1 Scope . 1
22 2 Normative references . 2
23 3 Terms, definitions and abbreviated terms . 3
24 3.1 Terms and definitions . 3
25 3.2 Abbreviated terms . 10
26 4 Conformance . 11
27 5 Telecommunications cabling within the data centre . 13
28 5.1 General. 13
29 5.2 Requirements for cabling supporting the IT operations in all data centre spaces . 14
30 5.3 Requirements for cabling providing distributed building services in all data centre spaces 14
31 5.4 Requirements for cabling for ICT services to and within the computer room space . 15
32 6 Implementation of cabling in accordance with ISO/IEC 11801-5 . 22
33 6.1 General. 22
34 6.2 Functional elements . 22
35 6.3 Distribution areas and spaces . 26
36 6.4 Infrastructures supporting the functional elements of ISO/IEC 11801-5 . 32
37 7 Physical security . 35
38 7.1 General. 35
39 7.2 Protection against unauthorized access . 35
40 7.3 Protection against internal events . 36
41 8 Availability classification for the telecommunications cabling infrastructure, infrastructure
42 elements, facilities and spaces . 37
43 8.1 General. 37
44 8.2 Availability design principles for telecommunications cabling infrastructure . 38
45 8.3 Overview about the Availability Classes for telecommunications cabling . 39
46 8.4 Availability Class design requirements and recommendations . 40
47 9 Management and operation of the telecommunications cabling infrastructure . 61
48 9.1 General. 61
49 9.2 Automated infrastructure management systems . 61
50 Annex A (informative) Design concepts for network distribution cabling . 62
51 Annex B (informative) Energy efficiency considerations for the telecommunications cabling
52 infrastructure . 83
53 Annex C (informative) Summary of requirements . 84
54 Annex D (informative) Examples of telecommunications cabling infrastructures including active
55 equipment . 4
56 Annex E (informative) Availability description . 9
57 Annex F (normative) Availability Classes for cabling infrastructures in colocation data centres11
58 Annex G (informative) Integration of standalone IT systems in data centres . 20
59 Bibliography . 26
61 15 Foreword . vi
62 16 Introduction . vii
63 17 1 Scope . 1

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18 2 Normative references . 1
19 3 Terms, definitions and abbreviated terms . 2
20 3.1 Terms and definitions . 2
21 3.2 Abbreviated terms . 6
22 4 Conformance . 7
23 5 Telecommunications cabling within the data centre . 8
24 5.1 General . 8
25 5.2 Requirements for cabling supporting the IT operations in all data centre spaces . 8
26 5.3 Requirements for cabling providing distributed building services in all data centre
27 spaces . 8
28 5.4 Requirements for cabling for IT and network telecommunications to and within the
29 computer room space . 9
30 5.4.1 General . 9
31 5.4.2 Point-to-point cabling . 9
32 5.4.3 Requirements for fixed cabling . 11
33 6 Implementation of cabling in accordance with ISO/IEC 11801-5 . 12
34 6.1 General . 12
35 6.2 Functional elements . 12
36 6.3 Distribution areas and spaces . 13
37 6.3.1 General . 13
38 6.3.2 Distribution areas . 15
39 6.3.3 Building entrance facility .16
40 6.3.4 Entrance rooms . 17
41 6.4 Infrastructures supporting the functional elements of ISO/IEC 11801-5 . 18
42 6.4.1 General . 18
43 6.4.2 Pathways and pathway systems for telecommunications cabling . 18
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44 6.4.3 Cabinets, frames and racks for the computer room space . 19
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45 7 Physical Security . 20 Formatted: Font: Not Bold, Not Expanded by /
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46 7.1 General . 20
47 7.2 Protection against unauthorized access . 20
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48 7.2.1 Pathways and spaces . 20
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49 7.2.2 Entrance room . 20
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50 7.3 Protection against internal events . 21
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51 8 Availability classification for the telecommunications cabling infrastructure,
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52 infrastructure elements, facilities and spaces . 21
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53 8.1 General . 21
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54 8.2 Availability design principles for telecommunications cabling infrastructure . 21
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55 8.3 Overview about the availability classes for telecommunications cabling . 22
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56 8.4 Availability Class design requirements and recommendations . 23
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57 8.4.1 Transmission channel design for the network distribution cabling . 23
58 8.4.2 Availability Class 1 . 23 Formatted: Font: Not Bold, Not Expanded by /
59 8.4.3 Availability Class 2 . 25 Condensed by
60 8.4.4 Availability Class 3 . 27
61 8.4.5 Availability Class 4 . 30

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62 9 Management and operation of the telecommunications cabling infrastructure . 33
63 9.1 General . 33
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64 9.2 Automated infrastructure management systems . 33 Condensed by
65 Annex A (informative) Design concepts for network distribution cabling. 34
66 A.1 General . 34
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67 A.2 Class 1 cabling concept . 34
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68 A.3 Class 2 cabling concepts . 35
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69 A.3.1 General . 35
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70 A.3.2 End of row and middle of row concepts . 35
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71 A.3.3 Top of rack concept . 37
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72 A.4 Class 3 cabling concepts . 38
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73 A.4.1 General . 38
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74 A.4.2 End of row and middle of row concepts . 38
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75 A.4.3 Top of rack concept . 39
76 A.5 Class 4 cabling concepts . 40
77 A.5.1 General . 40
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78 A.5.2 End of row and middle of row concepts . 40
79 A.5.3 Top of rack concept . 41
80 Annex B (informative) Energy efficiency considerations for the telecommunications
81 cabling infrastructure . 43
82 Annex C (informative) Summary of requirements . 44
83 Annex D (informative) Examples of telecommunications cabling infrastructures
84 including active equipment . 1
85 D.1 General . 1
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86 D.2 Example for Availability Class 3 . 1
87 D.3 Example for Availability Class 4 . 2
88 D.4 Example for Availability Class 3 implemented across multiple floors . 2
89 D.5 Example for Availability Class 3 in spine/leaf architecture with out-of-band
90 management . 3
91 Annex E (informative) Availability description . 4
92 Annex F (normative) Availability Classes for cabling infrastructures in colocation data
93 centres . 5
94 F.1 General . 5
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95 F.2 Telecommunications cabling infrastructures in customer spaces . 5
96 F.2.1 Availability Classes . 5
97 F.2.2 Requirements for spaces and distribution areas . 5
98 F.2.3 Requirements for pathways and pathway systems . 5
99 F.2.4 Requirements for cabinets, frames and racks . 5
100 F.3 Telecommunications supply cabling . 5

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101 F.3.1 Availability Classes . 5
102 F.3.2 Spaces and distribution areas . 5
103 F.3.2.1 Meet-Me-Room (MMR) . 5
104 F.3.2.2 Floor distribution area . 6
105 F.3.2.3 Requirements for spaces and distribution areas . 6
106 F.3.3 Requirements for pathways and pathway systems . 6
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107 F.3.4 Requirements for cabinets, frames and racks . 6
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108 F.4 Colocation campus cabling . 6
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109 F.4.1 General . 6
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110 F.4.2 Requirements for spaces and distribution areas . 6
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111 F.4.3 Requirements for pathways and pathway systems . 6
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112 F.4.4 Requirements for cabinets, frames and racks . 6
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113 F.5 Examples of telecommunications supply and campus cabling concepts . 7
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114 F.5.1 Telecommunications supply cabling in a single building colocation data centre 7
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115 F.5.2 Telecommunications supply and campus cabling in a multi-building/single floor
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116 colocation facility . 7
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117 Bibliography . 9
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119 Foreword
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120 ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
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Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or
IEC participate in the development of International Standards through technical committees established by the
respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate
in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO
and IEC, also take part in the work.
121 The procedures used to develop this document and those intended for its further maintenance are
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described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of
document should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives,
Part 2 (see www.iso.org/directives or www.iec.ch/members_experts/refdocs). www.iso.org/directives or
www.iec.ch/members_experts/refdocs).
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122 ISO and IEC draw attention to the possibility that the implementation of this document may involve the
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use of (a) patent(s). ISO and IEC take no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO and IEC had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at www.iso.org/patents and
https://patents.iec.ch.www.iso.org/patents and https://patents.iec.ch. ISO and IEC shall not be held responsible for
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identifying any or all such patent rights.
123 Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
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124 For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT) see
www.iso.org/iso/foreword.htmlwww.iso.org/iso/foreword.html. In the IEC, see www.iec.ch/understanding-
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standards. www.iec.ch/understanding-standards.
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125 This document was prepared by Technical Committee ISO/IEC JTC 1, Information Technology,
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126 technology, Subcommittee SC 39, Sustainability, IT and data centres.
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127 This first edition cancels and replaces ISO/IEC TS 22237-5:2018, which has been technically revised.
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128 technically revised.
129 The main changes are as follows:
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130— — the document structure has been completely revised;
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131— — the availability classesAvailability Classes have been revised;
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132— — a clause on physical security has been added (Clause 7);(Clause 7);
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133— — Annex CAnnex C summarizing the requirements and recommendations of the document has been added;
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134 — Annex DAnnex D with examples for cabling infrastructures including the location of active equipment
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has
135— been added;
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136— — Annex EAnnex E with an availability description has been added;
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137— — Annex FAnnex F with specific requirements for colocation data centres has been added.
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138 A list of all parts in the ISO/IEC 22237 series can be found on the ISO website.
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139 Any feedback or questions on this document should be directed to the user’s national standards body.
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140 A complete listing of these bodies can be found at www.iso.org/members.html.
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141 Introduction
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164 188
165 189
167 191
168 192
169 193
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182 1)
183 2)
185 3)
186 4)
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The ) and by enterprises within those customer premises.
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unrestrict
ed access Data centres need to provide modular, scalable and flexible facilities and infrastructures to easily
to accommodate the rapidly changing requirements of the market. In addition, energy consumption of data
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centres has become critical, both from an environmental point of view (reduction of carbon footprint),) and
internet-
with respect to economic considerations (cost of energy) for the data centre operator.
based
informati
The implementation of data centres varies in terms of:
on Formatted: Not Expanded by / Condensed by
demande
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a)— purpose (enterprise, co-location, co-hosting or network operator facilities);
d by the
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informati
b)— security level;
on Formatted: Not Expanded by / Condensed by
society
c)— physical size; and
has led to
an
d)— accommodation (mobile, temporary and permanent constructions).
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exponent
ial
NOTE Cloud services can be provided by all data centre types mentioned.
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growth of
both Formatted: Note, Indent: Left: 0 cm, Space Before: 0
The needs of data centres also vary in terms of availability of service, the provision of security and the
internet
objectives for energy efficiency. These needs and objectives influence the design of data centres in terms of Formatted: Indent: Left: 0 cm, Right: 0 cm, Space
traffic
building construction, power distribution, environmental control, telecommunications cabling and physical Before: 0 pt
and the
security. Effective management and operational information is required to monitor achievement of the defined
volume of
needs and objectives.
stored/re
trieved
The ISO/IEC 22237 series specifies requirements and recommendations to support the various parties
data. Data
involved in the design, planning, procurement, integration, installation, operation and maintenance of facilities
centres
and infrastructures within data centres. These parties include:
are
housing
— owners, operators, facility managers, ICT managers, project managers, main contractors;
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and
supportin
— consultants, architects, building designers and builders, system/ or installation designers, auditors, test
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g the
and commissioning agents;
informati
on
— suppliers of equipment; and
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technolog
y and — installers, maintainers.
network
telecomm
unication
s
equipme
nt for
data
processin
g, data
storage
and data
transport
. They are
required
both by
network
operators
(deliverin
g those
services
to
customer
premises
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195 The inter-relationship of the documents within the ISO/IEC 22237 series is shown in Figure 1.Figure 1.
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• Figure 1 — Schematic relationship between the ISO/IEC 22237 series of documents
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Expanded by / Condensed by
197 ISO/IEC 22237-2 toISO/IEC 22237-3, ISO/IEC 22237-4, this document and ISO/IEC 22237-6 specify
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requirements and recommendations for particular
198 facilities and infrastructures to support the relevant classification for “availability”, “physical
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199 security” and “energy efficiency enablement” selected from ISO/IEC 22237−1.
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200 This document addresses the specific requirements for the telecommunications cabling
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201 infrastructure in data centres used for the purpose of IT networking and building services (in
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202 accordance with the requirements of ISO/IEC 22237−1.
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203 ISO/IEC TS 22237-7 addresses the operational and management information (in accordance with the
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204 requirements of ISO/IEC 22237-1.
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205 ISO/IEC TS 22237-31 addresses resilience attributes, including dependability and fault tolerance metrics.
206 This document is intended for use by and collaboration between architects, building designers and
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207 , builders, and system and installation designers.
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208 The ISO/IEC 22237 series does not address the selection of information technology and network
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telecommunications equipment, software and associated configuration issues.
209 telecommunications equipment, software and associated configuration issues.

210 Figure 2Figure 2 shows the schematic and contextual relationships of ISO/IEC 22237-5 with other
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cabling
211 and cabling installation related standards.
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212 Figure 2 — Schematic relationship between ISO/IEC 22237-5 and other cabling design and
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Condensed by
213 installation standards
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214 The importance of the information technology and network telecommunications cabling Formatted: Not Expanded by / Condensed by
215 infrastructure is similar to that of other infrastructures such as environmental control, power
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216 distribution and security systems. As with other utilities, interruptions to service can have a serious
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217 impact. Poor quality of service due to lack of planning, use of inappropriate components, incorrect
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218 installation, poor administration or inadequate support can threaten an organization's
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effectiveness. Formatted: Not Expanded by / Condensed by
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ISO/IEC DIS 22237-5:202x(E)
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© ISO/IEC 2026 – All rights reserved
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© ISO/IEC 2025 –x viAll rights reserved

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231 Information technology — Data centre facilities and
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infrastructures — —
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232 Part 5: Telecommunication
Telecommunications cabling
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233 infrastructure
Condensed by
3051 1 Scope
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by
234 This document specifies design principles for information technology (IT) and
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network
235 telecommunications cabling (e.g. SANstorage area network and LANlocal area network) in accordance
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with ISO/IEC 11801-5, based upon the
236 criteria and classifications for “availability” and “physical security” within ISO/IEC 22237-1.
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237 This document addressesapplies to the telecommunications cabling infrastructures used in data centres.
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It
238 describes:
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239a) a) for design, the application of generic cabling standards in the ISO/IEC 11801 series;
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240 b) for installation specification, planning and practices and quality assurance, the application of
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241b) ISO/IEC 14763-2 (and related standards).
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242 In addition, this document specifies requirements and recommendations for the following:
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— general information technologyIT cabling to support the IT operation of the data centre;
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— telecommunications cabling to monitor and control, as appropriate, power distribution, environmental control and
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physical security of the data centre, ;
Condensed by
— other building automation cabling,;
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— pathways, pathway systems, spaces and enclosures for the telecommunications cabling infrastructures.
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Condensed by
243 Safety and electromagnetic compatibility (EMC) requirements are outside the scope of this document and
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are covered by other standards and regulations. However, information given in this document can be of assistance in
meeting these standards and regulations.
244 and are covered by other standards and regulations. However, information given in this document
245 can be of assistance in meeting these standards and regulations.
246 Conformance of data centres to the present document is covered in Clause 4.

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3052 2 Normative references
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by
247 The following documents are referred to in the text in such a way that some or all of their content
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constitutes requirements of this document. For dated references, only the edition cited applies. For undated references,
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the latest edition of the referenced document (including any amendments) applies.
248 constitutes requirements of this document. For dated references, only the edition cited applies. For
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249 undated references, the latest edition of the referenced document (including any amendments)
250 applies.
251 ISO/IEC 11801-2, Information technology — Generic cabling for customer premises –— Part 2: Office
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252 premises
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253 ISO/IEC 11801-5, Information technology — Generic cabling for cus
...