EN 50173-6:2018

SLOVENSKI STANDARD
01-oktober-2018
Nadomešča:
SIST EN 50173-6:2013
Informacijska tehnologija - Generični kabelski sistemi - 6. del: Porazdeljene
storitve v stavbah
Information technology - Generic cabling systems - Part 6: Distributed building services
Informationstechnik - Anwendungsneutrale Kommunikationskabelanlagen - Teil 6:
Verteilte Gebäudedienste
Technologies de l’information - Systèmes de câblage générique - Partie 6 : Services
distribués dans les bâtiments
Ta slovenski standard je istoveten z: EN 50173-6:2018
ICS:
33.040.50 Vodi, zveze in tokokrogi Lines, connections and
circuits
35.110 Omreževanje Networking
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50173-6
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2018
ICS 35.110 Supersedes EN 50173-6:2013
English Version
Information technology - Generic cabling systems - Part 6:
Distributed building services
Technologies de l'information - Systèmes de câblage Informationstechnik - Anwendungsneutrale
générique - Partie 6 : Services distribués dans les Kommunikationskabelanlagen - Teil 6: Verteilte
bâtiments Gebäudedienste
This European Standard was approved by CENELEC on 2018-03-19. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50173-6:2018 E
Contents Page
European foreword . 6
Introduction . 7
1 Scope and conformance . 10
1.1 Scope .10
1.2 Conformance .10
2 Normative references . 11
3 Terms, definitions and abbreviations . 11
3.1 Terms and definitions .11
3.2 Abbreviations .12
4 Structure of the generic cabling for distributed building services . 12
4.1 General .12
4.2 Functional elements .13
4.2.1 Stand-alone structure .13
4.2.2 Overlay structure .13
4.3 Structure and hierarchy .13
4.3.1 Type A generic cabling .13
4.3.2 Type B generic cabling .15
4.3.3 Centralized cabling .16
4.4 Cabling subsystems .16
4.4.1 Service distribution cabling subsystem (Type A generic cabling).16
4.4.2 Service distribution cabling subsystem (Type B generic cabling).17
4.4.3 Associated cabling subsystems .17
4.5 Design objectives .17
4.5.1 General .17
4.5.2 Service distribution cabling (Type A generic cabling) .18
4.5.3 Service distribution cabling subsystem (Type B generic cabling).18
4.5.4 Backbone cabling .19
4.5.5 Tie cabling .19
4.6 Accommodation of functional elements .19
4.6.1 General .19
4.6.2 Service Outlets.20
4.6.3 Distributors .20
4.6.4 Cables .20
4.6.5 Service Concentration Points .20
4.7 Interfaces .21
4.7.1 Equipment interfaces and test interfaces.21
4.7.2 Channels and links .22
4.8 Dimensioning and configuring .22
4.8.1 General .22
4.8.2 Type A generic cabling .24
4.8.3 Type B generic cabling .25
4.8.4 Service Concentration Point .26
4.8.5 Connecting hardware .26
4.9 Relevant building services .26
5 Requirement of channels for distributed building services . 27
5.1 General .27
5.2 Environmental performance .28
5.3 Transmission performance .28
5.3.1 General .28
5.3.2 Balanced cabling .28
5.3.3 Optical fibre cabling .29
6 Reference implementations for distributed building services. 29
6.1 General .29
6.2 Balanced cabling .29
6.2.1 General .29
6.2.2 Service distribution cabling (Type A generic cabling) .30
6.2.3 Service distribution cabling (Type B generic cabling) .33
6.2.4 Backbone cabling .34
6.3 Optical fibre .34
6.3.1 Service distribution cabling (Type A generic cabling) .34
6.3.2 Service distribution cabling (Type B generic cabling) .34
6.4 Backbone cabling .34
7 Requirements of cables for distributed building services . 34
7.1 General .34
7.2 Balanced cables of Category 6 , 7, 7A, 8.1 and 8.2 .34
A
7.3 Optical fibre cables of Category OM3, OM4, OM5, OS1a and OS2 .34
8 Requirements of connecting hardware for distributed building services . 35
8.1 General requirements .35
8.2 Balanced connecting hardware .35
8.2.1 General requirements .35
8.2.2 Electrical, mechanical and environmental performance .35
8.3 Connecting hardware for optical fibre cabling .35
8.3.1 General requirements .35
8.3.2 Optical, mechanical and environmental performance .35
9 Requirements for cords and jumpers for distributed building services . 36
9.1 Jumpers .36
9.2 Balanced cords of Category 6 , 7, 7 , 8.1 and 8.2 .36
A A
9.2.1 General .36
9.2.2 Additional requirements for certain cords .36
9.3 Optical fibre cords of Category OM3, OM4, OM5, OS1a and OS2 .36
Annex A (normative) Link performance limits . 37
A.1 General. 37
A.2 Balanced cabling . 37
A.3 Optical fibre cabling . 38
Annex B (informative) Services and applications . 39
B.1 Introduction . 39
B.2 Service sectors and services . 39
B.2.1 Access control . 39
B.2.2 Burglar alarms . 40
B.2.3 Asset management . 40
B.2.4 Audio-visual . 40
B.2.5 Building information systems . 40
B.2.6 Building well-being and structural sensor systems . 41
B.2.7 Energy management . 41
B.2.8 Environmental control . 41
B.2.9 Fixed IT services . 42
B.2.10 Personal well-being . 42
B.2.11 Shared IT services . 42
B.3 SCP grid density . 45
B.4 Cabling provision to SCPs. 45
Annex C (informative) Overlay . 47
C.1 Functional elements . 47
C.1.1 Type A generic cabling . 47
C.1.2 Type B generic cabling . 47
C.2 General structure and hierarchy . 47
C.2.1 Type A generic cabling . 47
C.2.2 Type B generic cabling . 48
Annex D (informative) Optical fibre within the Type B service distribution cabling subsystem . 49
D.1 Overview . 49
D.2 Implementation recommendations . 49
D.2.1 Channel performance . 49
D.2.2 Reference implementation . 49
D.2.3 Cables . 50
D.2.4 Connecting hardware . 51
D.2.5 Cords. 51
Bibliography . 52

Figures
Figure 1 — Schematic relationship between the EN 50173 series and other relevant standards . 8
Figure 2 — Structure of Type A generic cabling . 14
Figure 3 — Hierarchical structure of Type A generic cabling . 14
Figure 4 — Structure of Type B generic cabling . 15
Figure 5 — Hierarchical structure of Type B generic cabling . 15
Figure 6 — Structures for centralized generic cabling . 16
Figure 7 — Examples of cabling implementation to improve reliability . 18
Figure 8 — Accommodation of functional elements . 19
Figure 9 — Accommodation of TEs (Type B generic cabling). 20
Figure 10 — Example of direct connection to SCP . 21
Figure 11 — Test and equipment interfaces (Type A generic cabling) . 21
Figure 12 — Test and equipment interfaces (Type B generic cabling) . 22
Figure 13 — Example of a Type A generic cabling system with combined BD and SD . 23
Figure 14 — Transmission performance of a service distribution channel . 27
Figure 15 — Example of a system showing the location of cabling interfaces . 28
Figure 16 — Service distribution cabling models . 32
Figure A.1 — Link options . 37
Figure B.1 — Wireless application coverage area grid . 44
Figure D.1 — Combined optical fibre backbone/service distribution channels . 50
Tables
Table 1 — Contextual relationship between EN 50173 series and other standards relevant for
information technology cabling systems . 8
Table 2 — Maximum channel lengths for Type A reference implementations . 23
Table 3 — Maximum channel lengths for Type B reference implementations . 25
Table 4 — Service distribution channel formulae . 33
Table B.1 — Supported wireless applications . 42
Table B.2 — Recommended SCP grid dimensions . 45
Table B.3 — Estimated SOs per SCP . 46
European foreword
This document (EN 50173-6:2018) has been prepared by CLC/TC 215 “Electrotechnical aspects of
telecommunication equipment”.
The following dates are fixed:
• latest date by which this document has (dop) 2019-03-19
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2021-03-19
standards conflicting with this document
have to be withdrawn
This document supersedes EN 50173-6:2013.
The European Standards EN 50173:1995 and EN 50173-1:2002 have been developed to enable the
application-independent cabling to support ICT applications in office premises. Their basic principles,
however, are applicable to other types of applications and in other types of premises.
Therefore, CLC/TC 215 has established relevant European Standards which address the specific
requirements of these premises. In order to point out the commonalities of these cabling design standards,
these European Standards are published as individual parts of the EN 50173 series, thus also acknowledging
that standards users recognize the designation “EN 50173” as a synonym for generic cabling design.
At the time of publication of this European Standard, EN 50173 series comprises the following standards:
EN 50173-1 Information technology — Generic cabling systems — Part 1: General requirements
EN 50173-2 Information technology — Generic cabling systems — Part 2: Office spaces
EN 50173-3 Information technology — Generic cabling systems — Part 3: Industrial spaces
EN 50173-4 Information technology — Generic cabling systems — Part 4: Homes
EN 50173-5 Information technology — Generic cabling systems — Part 5: Data centre spaces
EN 50173-6 Information technology — Generic cabling systems — Part 6: Distributed building
services
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This edition of EN 50173-6:
a) introduces new components 8.1 and 8.2 for balanced cabling to support new channel Classes I and II as
well as optical fibre cabling (OM5) as defined in EN 50173-1:2018;
b) revises Annex B on services and applications;
c) revises Annex D on optical fibres used in the Type B service distribution type cabling system;
d) aligns the document structure across the EN 50173 series and updates the document both technically
and editorially.
Introduction
The importance of cabling infrastructure is similar to that of other fundamental utilities such as water and
energy supply and interruptions to the services provided over that infrastructure can have a serious impact. A
lack of design foresight, the use of inappropriate components, incorrect installation, poor administration or
inadequate support can threaten quality of service and have commercial consequences for all types of users.
This standard specifies generic cabling for distributed building services and can be used as a stand-alone
infrastructure or in conjunction with all the space-specific standards of the EN 50173 series.
It has been prepared to reflect the increasing use of generic cabling in support of non-user specific services
and the sharing of information between such services, many of which require the use of remote powered
devices. The distribution of these services is implemented either as a stand-alone structure and configuration
or as an overlay provided to locations other than those specified by space-specific standards in the
EN 50173 series.
This standard is not intended to replace the application of other space-specific standards in EN 50173 series
but has been prepared in recognition of the fact that, although certain functional elements of distributed
building services cabling can be co-located with those of other generic cabling infrastructures, it can be:
— specified, installed and operated by different entities than those responsible for other generic cabling
infrastructures that are be installed within the premises;
— specified and installed at a different time than other generic cabling infrastructures that are be installed
within the premises.
Figure 1 and Table 1 show the schematic and contextual relationships between the standards produced by
TC 215 for information technology cabling, namely:
1) this and other parts of the EN 50173 series;
2) installation (EN 50174 series);
3) bonding (EN 50310).
In addition, a number of Technical Reports have been developed to support or extend the application of these
standards, including:
— CLC/TR 50173-99-1, Cabling guidelines in support of 10 GBASE-T;
— CLC/TR 50173-99-2, Information technology — Implementation of BCT applications using cabling in
accordance with EN 50173-4;
— CLC/TR 50173-99-3, Information technology — Generic cabling systems — Part 99-3: Home cabling
infrastructures up to 50 m in length to support simultaneous and non simultaneous provision of
applications.
In addition, a number of cabling design standards have been developed using components of EN 50173-1
(e.g. EN 50098 series and EN 50700).
Figure 1 — Schematic relationship between the EN 50173 series and other relevant standards
Table 1 — Contextual relationship between EN 50173 series and other standards relevant for
information technology cabling systems
Building design Generic cabling Specification Installation Operation phase
phase design phase phase phase
EN 50310 EN 50173-2 EN 50174-1
EN 50173-3
Planning phase
EN 50173-4
EN 50174-2
EN 50173-5
EN 50174-3 EN 50174-1
EN 50173-6 EN 50174-2
EN 50310
EN 50174-3
(these ENs
EN 50310
reference general
requirements of
EN 50173-1)
The generic cabling specified by this standard provides users with:
— an application independent system capable of supporting a wide range of applications in a range of
installation and operating environments;
— a flexible scheme such that modifications are both easy and economical;
— a multi-vendor supply chain within an open market for cabling components.
In addition this standard provides:
a) relevant industry professionals with guidance allowing the accommodation of cabling before specific
requirements are known; i.e. in the initial planning either for construction or refurbishment and for further
deployment as the requirements of areas are defined;
b) industry and standardization bodies with a cabling system which supports current products and provides
a basis for future product development and applications standardization.
Applications addressed in this standard include the Technical Committees of IEC (including the
subcommittees of ISO/IEC JTC 1) and study groups of ITU-T as used to support the following services:
— telecommunications, e.g. wireless access points, distributed antenna systems;
— energy management, e.g. lighting, power distribution, incoming utility metering;
— environmental control, e.g. temperature, humidity;
— personnel management, e.g. access control, cameras, passive infrared (PIR) detectors, time and
attendance monitoring, electronic signage, audio-visual (AV) projectors;
— personal information and alarms, e.g. paging, patient monitoring, nurse call, infant security;
— “intelligent” building systems.
Physical layer requirements for the applications listed in EN 50173-1:2018, Annex F, have been analysed to
determine their compatibility with the cabling performance specified in this standard and, together with
statistics concerning premises geography from different countries and the models described in Clause 4,
have been used to develop the requirements for cabling components and to stipulate their arrangement into
cabling systems.
As a result, this standard:
a) specifies a structure for generic cabling supporting a wide variety of applications including, but not
restricted to, those in EN 50173-1:2017, Annex F;
b) adopts balanced cabling channel and link Classes EA, F and FA, specified in EN 50173-1;
c) adopts optical fibre cabling channel and link requirements specified in EN 50173-1;
d) adopts component requirements, specified in EN 50173-1, and specifies cabling implementations that
ensures performance of links and of channels meeting the requirements of a specified group (e.g. Class)
of applications.
Life expectancy of generic cabling systems can vary depending on environmental conditions, supported
applications, aging of materials used in cables, and other factors such as access to pathways (campus
pathways are more difficult to access than building pathways).
With appropriate choice of components, generic cabling systems meeting the requirements of this standard
are expected to have a life expectancy of at least ten years.
1 Scope and conformance
1.1 Scope
This standard specifies generic cabling for distributed building services and can be used in conjunction with
all the space-specific standards of the EN 50173 series.
It covers balanced cabling and optical fibre cabling.
This standard specifies directly or via reference to EN 50173-1 the:
— structure and minimum configuration for generic cabling for distributed building services;
— interfaces at the service outlet (SO);
— performance requirements for cabling links and channels;
— implementation requirements and options;
— performance requirements for cabling components;
— conformance requirements and verification procedures.
This standard has taken into account requirements specified in application standards listed in EN 50173-1.
Safety and electromagnetic compatibility (EMC) requirements are outside the scope of this standard and are
covered by other standards and regulations. However, information given in this standard can be of assistance
in meeting these standards and regulations.
1.2 Conformance
For a cabling installation to conform to this standard the following applies:
a) The configuration and structure shall conform to the requirements of Clause 4.
b) Channels shall meet the requirements of Clause 5.
This shall be achieved by one of the following:
1) a channel design and implementation ensuring that the prescribed channel performance of Clause 5
is met;
2) attachment of appropriate components to a permanent link or SCP link design meeting the
prescribed performance class of Annex A. Channel performance shall be ensured where a channel
is created by adding more than one cord to either end of a link meeting the requirements of
Annex A;
3) for E1 environments, using the reference implementations of Clause 6 and compatible cabling
components conforming to the requirements of Clauses 7, 8 and 9 based upon a statistical
approach of performance modelling.
c) The interfaces to the cabling at the SO shall conform to the requirements of Clause 8 with respect to
mating interfaces and performance.
d) Connecting hardware at other places in the cabling structure shall meet the performance requirements
specified in Clause 8 independent of the interface used.
e) The requirements of EN 50174 series standards and EN 50310 shall be met.
f) Local regulations, including those concerning safety and EMC, shall be met.
This standard does not specify which tests and sampling levels should be adopted. Test methods to assess
conformance with the channel and link requirements of Clause 5 and Annex A respectively are specified in
EN 50173-1. The test parameters to be measured, the sampling levels and the treatment of measured results
to be applied for a particular installation shall be defined in the installation specification and quality plans for
that installation prepared in accordance with EN 50174-1.
In the absence of the channel, the conformance of the link shall be used to verify conformance with the
standard.
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.
EN 50173-1:2018, Information technology — Generic cabling systems — Part 1: General requirements
EN 50174-1, Information technology — Cabling installation — Part 1: Installation specification and quality
assurance
EN 50174-2, Information technology — Cabling installation — Part 2: Installation planning and practices
inside buildings
EN 50174-3, Information technology — Cabling installation — Part 3: Installation planning and practices
outside buildings
EN 61076-3-106:2006, Connectors for electronic equipment — Product requirements — Part 3-106:
Rectangular connectors — Detail specification for protective housings for use with 8-way shielded and
unshielded connectors for industrial environments incorporating the IEC 60603-7 series interface
(IEC 61076-3-106:2006)
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 50173-1, EN 50174-1 and the
following apply.
3.1.1
building service
non-user specific service within premises including, but not restricted to, building automation, security, access
control, building management, wireless access points, information displays and alarm systems
3.1.2
distributed building service
building service provided to locations additional to those specified in premises-specific standards in
EN 50173 series
3.1.3
network conversion interface
passive or active device allowing the attachment of cabling of different network topologies to a service
concentration point
3.1.4
service area
area in a room or other space where non-user specific equipment is placed and connected to the same SCP
or groups of SOs
3.1.5
service area cord
cord connecting the service outlet to the terminal equipment
3.1.6
service concentration point
connection point in the Type A generic cabling between a service distributor and a service outlet or a
connection point offering connections to terminal equipment at the end of Type B generic cabling
3.1.7
service concentration point cable
cable between a service concentration point and a service outlet
3.1.8
service distribution cable
cable connecting the service distributor to the service outlet(s) or service concentration point(s) of Type A
cabling
3.1.9
service outlet
fixed connecting device where the service distribution cabling terminates
3.2 Abbreviations
For the purposes of this document, the abbreviations given in EN 50173-1 and the following apply.
AV Audio-visual
DAS Distributed Antenna System
OE EQP Opto-electronic equipment
PIR Passive Infrared
RFID Radio Frequency Identification
SCP Service Concentration Point
SD Service Distributor
SO Service Outlet
TE Terminal Equipment
WAP Wireless Access Point
4 Structure of the generic cabling for distributed building services
4.1 General
This clause identifies the functional elements of generic cabling, describes how they are connected together
to form subsystems and identifies the interfaces at which application-specific components are connected to
the generic cabling infrastructure. Applications listed in EN 50173-1:2018, Annex F, are supported by
connecting active equipment to the generic cabling.
In general, all functional elements, subsystems and interfaces from the campus distributor to the floor
distributor as described in EN 50173-1 are applicable.
4.2 Functional elements
4.2.1 Stand-alone structure
In addition to the functional elements specified in EN 50173-1, this European Standard specifies two
implementations of generic cabling for distributed building services. This European Standard enables:
a) Type A generic cabling to the SO;
b) Type B generic cabling to the SCP, thereby providing the opportunity for:
— application-specific cabling to be installed between the SCP and terminal equipment;
— application-specific equipment to be connected at the SCP.
The specification of application-specific cabling and equipment connected to the SCP is outside the scope of
the European Standard.
Type A generic cabling uses the following functional elements and interfaces:
1) service distributor (SD);
2) service distribution cable;
3) service concentration point (SCP);
4) service concentration point cable (SCP cable);
5) service outlet (SO).
Type B generic cabling uses the following functional elements and interfaces:
i) service distributor (SD);
ii) service distribution cable;
iii) service concentration point (SCP).
Groups of these functional elements are connected together with those of EN 50173-1 to form cabling
subsystems (see 4.3).
4.2.2 Overlay structure
The structure of Type A and Type B generic cabling in association with generic cabling of other standards in
EN 50173 series is described in Annex C.
4.3 Structure and hierarchy
4.3.1 Type A generic cabling
4.3.1.1 Stand-alone structure
Type A generic cabling systems contain up to three cabling subsystems: campus backbone, building
backbone and service distribution cabling. The cabling subsystems are connected together to create a
generic cabling system with a structure as shown in Figure 2. The composition of the cabling subsystems is
described in 4.4.1, 4.4.3.1 and 4.4.3.2. The functional elements of the cabling subsystems are interconnected
to form a basic hierarchical topology as shown in Figure 3.
Where the functions of distributors are combined (see 4.8.1), the intermediate cabling subsystem(s) are not
required.
Connections between cabling subsystems are either active, requiring application-specific equipment, or
passive. Connection to application-specific equipment adopts either an interconnect or a cross-connect
approach (see EN 50173-1). Passive connections between cabling subsystems adopt either a cross-connect
approach, by way of either patch cords or jumpers, or an interconnect approach.
The SO shall be connecting hardware in accordance with Clause 8.

Figure 2 — Structure of Type A generic cabling

Figure 3 — Hierarchical structure of Type A generic cabling
4.3.1.2 Overlay structure
The structure of Type A generic cabling in association with generic cabling of other standards in
EN 50173 series is described in Annex C.
4.3.2 Type B generic cabling
4.3.2.1 Stand-alone structure
Type B generic cabling systems contain up to three cabling subsystems: campus backbone, building
backbone and service distribution cabling. The cabling subsystems are connected together to create a
generic cabling system with a structure as shown in Figure 4. The composition of the cabling subsystems is
described in 4.4.3.2, 4.4.3.1 and 4.4.2. The functional elements of the cabling subsystems are interconnected
to form a basic hierarchical topology as shown in Figure 5.

Figure 4 — Structure of Type B generic cabling

Figure 5 — Hierarchical structure of Type B generic cabling
Where the functions of distributors are combined (see 4.8.1), the intermediate cabling subsystem(s) are not
required.
Connections between cabling subsystems are either active, requiring application-specific equipment, or
passive. Connection to application-specific equipment adopts either an interconnect or a cross-connect
approach (see EN 50173-1). Passive connections between cabling subsystems adopt either a cross-connect
approach, by way of either patch cords or jumpers, or an interconnect approach.
4.3.2.2 Overlay structure
The structure of Type B generic cabling in association with generic cabling of other standards in
EN 50173 series is described in Annex C.
4.3.3 Centralized cabling
Centralized cabling structures as shown in Figure 6 combine backbone and service distribution channels. The
channels are provided by passive connections in the distributors. The connections are achieved by using
either cross-connections or interconnections. In addition, for centralized optical fibre cabling, it is possible to
create connections at the distributors using splices although this reduces the ability of the cabling to support
re-configuration.
Figure 6 — Structures for centralized generic cabling
4.4 Cabling subsystems
4.4.1 Service distribution cabling subsystem (Type A generic cabling)
The service distribution cabling subsystem extends from an SD to the SO(s) connected to it. The subsystem
includes:
a) the service distribution cables;
b) the mechanical termination of the service distribution cables at the SO and the SD together with
associated patch cords and/or jumpers at the SD;
c) (an) SCP(s) (optional);
d) the SCP cable(s).
Although service area and equipment cords are used to connect termina
...

SLOVENSKI STANDARD
01-oktober-2018
Nadomešča:
SIST EN 50173-6:2013
Informacijska tehnologija - Osnovni kabelski sistemi - 6. del: Porazdeljene storitve
v stavbah
Information technology - Generic cabling systems - Part 6: Distributed building services
Informationstechnik - Anwendungsneutrale Kommunikationskabelanlagen - Teil 6:
Verteilte Gebäudedienste
Technologies de l’information - Systèmes de câblage générique - Partie 6 : Services
distribués dans les bâtiments
Ta slovenski standard je istoveten z: EN 50173-6:2018
ICS:
33.040.50 Vodi, zveze in tokokrogi Lines, connections and
circuits
35.110 Omreževanje Networking
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50173-6
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2018
ICS 35.110 Supersedes EN 50173-6:2013
English Version
Information technology - Generic cabling systems - Part 6:
Distributed building services
Technologies de l'information - Systèmes de câblage Informationstechnik - Anwendungsneutrale
générique - Partie 6 : Services distribués dans les Kommunikationskabelanlagen - Teil 6: Verteilte
bâtiments Gebäudedienste
This European Standard was approved by CENELEC on 2018-03-19. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
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Switzerland, Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50173-6:2018 E
Contents Page
European foreword . 6
Introduction . 7
1 Scope and conformance . 10
1.1 Scope .10
1.2 Conformance .10
2 Normative references . 11
3 Terms, definitions and abbreviations . 11
3.1 Terms and definitions .11
3.2 Abbreviations .12
4 Structure of the generic cabling for distributed building services . 12
4.1 General .12
4.2 Functional elements .13
4.2.1 Stand-alone structure .13
4.2.2 Overlay structure .13
4.3 Structure and hierarchy .13
4.3.1 Type A generic cabling .13
4.3.2 Type B generic cabling .15
4.3.3 Centralized cabling .16
4.4 Cabling subsystems .16
4.4.1 Service distribution cabling subsystem (Type A generic cabling).16
4.4.2 Service distribution cabling subsystem (Type B generic cabling).17
4.4.3 Associated cabling subsystems .17
4.5 Design objectives .17
4.5.1 General .17
4.5.2 Service distribution cabling (Type A generic cabling) .18
4.5.3 Service distribution cabling subsystem (Type B generic cabling).18
4.5.4 Backbone cabling .19
4.5.5 Tie cabling .19
4.6 Accommodation of functional elements .19
4.6.1 General .19
4.6.2 Service Outlets.20
4.6.3 Distributors .20
4.6.4 Cables .20
4.6.5 Service Concentration Points .20
4.7 Interfaces .21
4.7.1 Equipment interfaces and test interfaces.21
4.7.2 Channels and links .22
4.8 Dimensioning and configuring .22
4.8.1 General .22
4.8.2 Type A generic cabling .24
4.8.3 Type B generic cabling .25
4.8.4 Service Concentration Point .26
4.8.5 Connecting hardware .26
4.9 Relevant building services .26
5 Requirement of channels for distributed building services . 27
5.1 General .27
5.2 Environmental performance .28
5.3 Transmission performance .28
5.3.1 General .28
5.3.2 Balanced cabling .28
5.3.3 Optical fibre cabling .29
6 Reference implementations for distributed building services. 29
6.1 General .29
6.2 Balanced cabling .29
6.2.1 General .29
6.2.2 Service distribution cabling (Type A generic cabling) .30
6.2.3 Service distribution cabling (Type B generic cabling) .33
6.2.4 Backbone cabling .34
6.3 Optical fibre .34
6.3.1 Service distribution cabling (Type A generic cabling) .34
6.3.2 Service distribution cabling (Type B generic cabling) .34
6.4 Backbone cabling .34
7 Requirements of cables for distributed building services . 34
7.1 General .34
7.2 Balanced cables of Category 6 , 7, 7A, 8.1 and 8.2 .34
A
7.3 Optical fibre cables of Category OM3, OM4, OM5, OS1a and OS2 .34
8 Requirements of connecting hardware for distributed building services . 35
8.1 General requirements .35
8.2 Balanced connecting hardware .35
8.2.1 General requirements .35
8.2.2 Electrical, mechanical and environmental performance .35
8.3 Connecting hardware for optical fibre cabling .35
8.3.1 General requirements .35
8.3.2 Optical, mechanical and environmental performance .35
9 Requirements for cords and jumpers for distributed building services . 36
9.1 Jumpers .36
9.2 Balanced cords of Category 6 , 7, 7 , 8.1 and 8.2 .36
A A
9.2.1 General .36
9.2.2 Additional requirements for certain cords .36
9.3 Optical fibre cords of Category OM3, OM4, OM5, OS1a and OS2 .36
Annex A (normative) Link performance limits . 37
A.1 General. 37
A.2 Balanced cabling . 37
A.3 Optical fibre cabling . 38
Annex B (informative) Services and applications . 39
B.1 Introduction . 39
B.2 Service sectors and services . 39
B.2.1 Access control . 39
B.2.2 Burglar alarms . 40
B.2.3 Asset management . 40
B.2.4 Audio-visual . 40
B.2.5 Building information systems . 40
B.2.6 Building well-being and structural sensor systems . 41
B.2.7 Energy management . 41
B.2.8 Environmental control . 41
B.2.9 Fixed IT services . 42
B.2.10 Personal well-being . 42
B.2.11 Shared IT services . 42
B.3 SCP grid density . 45
B.4 Cabling provision to SCPs. 45
Annex C (informative) Overlay . 47
C.1 Functional elements . 47
C.1.1 Type A generic cabling . 47
C.1.2 Type B generic cabling . 47
C.2 General structure and hierarchy . 47
C.2.1 Type A generic cabling . 47
C.2.2 Type B generic cabling . 48
Annex D (informative) Optical fibre within the Type B service distribution cabling subsystem . 49
D.1 Overview . 49
D.2 Implementation recommendations . 49
D.2.1 Channel performance . 49
D.2.2 Reference implementation . 49
D.2.3 Cables . 50
D.2.4 Connecting hardware . 51
D.2.5 Cords. 51
Bibliography . 52

Figures
Figure 1 — Schematic relationship between the EN 50173 series and other relevant standards . 8
Figure 2 — Structure of Type A generic cabling . 14
Figure 3 — Hierarchical structure of Type A generic cabling . 14
Figure 4 — Structure of Type B generic cabling . 15
Figure 5 — Hierarchical structure of Type B generic cabling . 15
Figure 6 — Structures for centralized generic cabling . 16
Figure 7 — Examples of cabling implementation to improve reliability . 18
Figure 8 — Accommodation of functional elements . 19
Figure 9 — Accommodation of TEs (Type B generic cabling). 20
Figure 10 — Example of direct connection to SCP . 21
Figure 11 — Test and equipment interfaces (Type A generic cabling) . 21
Figure 12 — Test and equipment interfaces (Type B generic cabling) . 22
Figure 13 — Example of a Type A generic cabling system with combined BD and SD . 23
Figure 14 — Transmission performance of a service distribution channel . 27
Figure 15 — Example of a system showing the location of cabling interfaces . 28
Figure 16 — Service distribution cabling models . 32
Figure A.1 — Link options . 37
Figure B.1 — Wireless application coverage area grid . 44
Figure D.1 — Combined optical fibre backbone/service distribution channels . 50
Tables
Table 1 — Contextual relationship between EN 50173 series and other standards relevant for
information technology cabling systems . 8
Table 2 — Maximum channel lengths for Type A reference implementations . 23
Table 3 — Maximum channel lengths for Type B reference implementations . 25
Table 4 — Service distribution channel formulae . 33
Table B.1 — Supported wireless applications . 42
Table B.2 — Recommended SCP grid dimensions . 45
Table B.3 — Estimated SOs per SCP . 46
European foreword
This document (EN 50173-6:2018) has been prepared by CLC/TC 215 “Electrotechnical aspects of
telecommunication equipment”.
The following dates are fixed:
• latest date by which this document has (dop) 2019-03-19
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2021-03-19
standards conflicting with this document
have to be withdrawn
This document supersedes EN 50173-6:2013.
The European Standards EN 50173:1995 and EN 50173-1:2002 have been developed to enable the
application-independent cabling to support ICT applications in office premises. Their basic principles,
however, are applicable to other types of applications and in other types of premises.
Therefore, CLC/TC 215 has established relevant European Standards which address the specific
requirements of these premises. In order to point out the commonalities of these cabling design standards,
these European Standards are published as individual parts of the EN 50173 series, thus also acknowledging
that standards users recognize the designation “EN 50173” as a synonym for generic cabling design.
At the time of publication of this European Standard, EN 50173 series comprises the following standards:
EN 50173-1 Information technology — Generic cabling systems — Part 1: General requirements
EN 50173-2 Information technology — Generic cabling systems — Part 2: Office spaces
EN 50173-3 Information technology — Generic cabling systems — Part 3: Industrial spaces
EN 50173-4 Information technology — Generic cabling systems — Part 4: Homes
EN 50173-5 Information technology — Generic cabling systems — Part 5: Data centre spaces
EN 50173-6 Information technology — Generic cabling systems — Part 6: Distributed building
services
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This edition of EN 50173-6:
a) introduces new components 8.1 and 8.2 for balanced cabling to support new channel Classes I and II as
well as optical fibre cabling (OM5) as defined in EN 50173-1:2018;
b) revises Annex B on services and applications;
c) revises Annex D on optical fibres used in the Type B service distribution type cabling system;
d) aligns the document structure across the EN 50173 series and updates the document both technically
and editorially.
Introduction
The importance of cabling infrastructure is similar to that of other fundamental utilities such as water and
energy supply and interruptions to the services provided over that infrastructure can have a serious impact. A
lack of design foresight, the use of inappropriate components, incorrect installation, poor administration or
inadequate support can threaten quality of service and have commercial consequences for all types of users.
This standard specifies generic cabling for distributed building services and can be used as a stand-alone
infrastructure or in conjunction with all the space-specific standards of the EN 50173 series.
It has been prepared to reflect the increasing use of generic cabling in support of non-user specific services
and the sharing of information between such services, many of which require the use of remote powered
devices. The distribution of these services is implemented either as a stand-alone structure and configuration
or as an overlay provided to locations other than those specified by space-specific standards in the
EN 50173 series.
This standard is not intended to replace the application of other space-specific standards in EN 50173 series
but has been prepared in recognition of the fact that, although certain functional elements of distributed
building services cabling can be co-located with those of other generic cabling infrastructures, it can be:
— specified, installed and operated by different entities than those responsible for other generic cabling
infrastructures that are be installed within the premises;
— specified and installed at a different time than other generic cabling infrastructures that are be installed
within the premises.
Figure 1 and Table 1 show the schematic and contextual relationships between the standards produced by
TC 215 for information technology cabling, namely:
1) this and other parts of the EN 50173 series;
2) installation (EN 50174 series);
3) bonding (EN 50310).
In addition, a number of Technical Reports have been developed to support or extend the application of these
standards, including:
— CLC/TR 50173-99-1, Cabling guidelines in support of 10 GBASE-T;
— CLC/TR 50173-99-2, Information technology — Implementation of BCT applications using cabling in
accordance with EN 50173-4;
— CLC/TR 50173-99-3, Information technology — Generic cabling systems — Part 99-3: Home cabling
infrastructures up to 50 m in length to support simultaneous and non simultaneous provision of
applications.
In addition, a number of cabling design standards have been developed using components of EN 50173-1
(e.g. EN 50098 series and EN 50700).
Figure 1 — Schematic relationship between the EN 50173 series and other relevant standards
Table 1 — Contextual relationship between EN 50173 series and other standards relevant for
information technology cabling systems
Building design Generic cabling Specification Installation Operation phase
phase design phase phase phase
EN 50310 EN 50173-2 EN 50174-1
EN 50173-3
Planning phase
EN 50173-4
EN 50174-2
EN 50173-5
EN 50174-3 EN 50174-1
EN 50173-6 EN 50174-2
EN 50310
EN 50174-3
(these ENs
EN 50310
reference general
requirements of
EN 50173-1)
The generic cabling specified by this standard provides users with:
— an application independent system capable of supporting a wide range of applications in a range of
installation and operating environments;
— a flexible scheme such that modifications are both easy and economical;
— a multi-vendor supply chain within an open market for cabling components.
In addition this standard provides:
a) relevant industry professionals with guidance allowing the accommodation of cabling before specific
requirements are known; i.e. in the initial planning either for construction or refurbishment and for further
deployment as the requirements of areas are defined;
b) industry and standardization bodies with a cabling system which supports current products and provides
a basis for future product development and applications standardization.
Applications addressed in this standard include the Technical Committees of IEC (including the
subcommittees of ISO/IEC JTC 1) and study groups of ITU-T as used to support the following services:
— telecommunications, e.g. wireless access points, distributed antenna systems;
— energy management, e.g. lighting, power distribution, incoming utility metering;
— environmental control, e.g. temperature, humidity;
— personnel management, e.g. access control, cameras, passive infrared (PIR) detectors, time and
attendance monitoring, electronic signage, audio-visual (AV) projectors;
— personal information and alarms, e.g. paging, patient monitoring, nurse call, infant security;
— “intelligent” building systems.
Physical layer requirements for the applications listed in EN 50173-1:2018, Annex F, have been analysed to
determine their compatibility with the cabling performance specified in this standard and, together with
statistics concerning premises geography from different countries and the models described in Clause 4,
have been used to develop the requirements for cabling components and to stipulate their arrangement into
cabling systems.
As a result, this standard:
a) specifies a structure for generic cabling supporting a wide variety of applications including, but not
restricted to, those in EN 50173-1:2017, Annex F;
b) adopts balanced cabling channel and link Classes EA, F and FA, specified in EN 50173-1;
c) adopts optical fibre cabling channel and link requirements specified in EN 50173-1;
d) adopts component requirements, specified in EN 50173-1, and specifies cabling implementations that
ensures performance of links and of channels meeting the requirements of a specified group (e.g. Class)
of applications.
Life expectancy of generic cabling systems can vary depending on environmental conditions, supported
applications, aging of materials used in cables, and other factors such as access to pathways (campus
pathways are more difficult to access than building pathways).
With appropriate choice of components, generic cabling systems meeting the requirements of this standard
are expected to have a life expectancy of at least ten years.
1 Scope and conformance
1.1 Scope
This standard specifies generic cabling for distributed building services and can be used in conjunction with
all the space-specific standards of the EN 50173 series.
It covers balanced cabling and optical fibre cabling.
This standard specifies directly or via reference to EN 50173-1 the:
— structure and minimum configuration for generic cabling for distributed building services;
— interfaces at the service outlet (SO);
— performance requirements for cabling links and channels;
— implementation requirements and options;
— performance requirements for cabling components;
— conformance requirements and verification procedures.
This standard has taken into account requirements specified in application standards listed in EN 50173-1.
Safety and electromagnetic compatibility (EMC) requirements are outside the scope of this standard and are
covered by other standards and regulations. However, information given in this standard can be of assistance
in meeting these standards and regulations.
1.2 Conformance
For a cabling installation to conform to this standard the following applies:
a) The configuration and structure shall conform to the requirements of Clause 4.
b) Channels shall meet the requirements of Clause 5.
This shall be achieved by one of the following:
1) a channel design and implementation ensuring that the prescribed channel performance of Clause 5
is met;
2) attachment of appropriate components to a permanent link or SCP link design meeting the
prescribed performance class of Annex A. Channel performance shall be ensured where a channel
is created by adding more than one cord to either end of a link meeting the requirements of
Annex A;
3) for E1 environments, using the reference implementations of Clause 6 and compatible cabling
components conforming to the requirements of Clauses 7, 8 and 9 based upon a statistical
approach of performance modelling.
c) The interfaces to the cabling at the SO shall conform to the requirements of Clause 8 with respect to
mating interfaces and performance.
d) Connecting hardware at other places in the cabling structure shall meet the performance requirements
specified in Clause 8 independent of the interface used.
e) The requirements of EN 50174 series standards and EN 50310 shall be met.
f) Local regulations, including those concerning safety and EMC, shall be met.
This standard does not specify which tests and sampling levels should be adopted. Test methods to assess
conformance with the channel and link requirements of Clause 5 and Annex A respectively are specified in
EN 50173-1. The test parameters to be measured, the sampling levels and the treatment of measured results
to be applied for a particular installation shall be defined in the installation specification and quality plans for
that installation prepared in accordance with EN 50174-1.
In the absence of the channel, the conformance of the link shall be used to verify conformance with the
standard.
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.
EN 50173-1:2018, Information technology — Generic cabling systems — Part 1: General requirements
EN 50174-1, Information technology — Cabling installation — Part 1: Installation specification and quality
assurance
EN 50174-2, Information technology — Cabling installation — Part 2: Installation planning and practices
inside buildings
EN 50174-3, Information technology — Cabling installation — Part 3: Installation planning and practices
outside buildings
EN 61076-3-106:2006, Connectors for electronic equipment — Product requirements — Part 3-106:
Rectangular connectors — Detail specification for protective housings for use with 8-way shielded and
unshielded connectors for industrial environments incorporating the IEC 60603-7 series interface
(IEC 61076-3-106:2006)
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 50173-1, EN 50174-1 and the
following apply.
3.1.1
building service
non-user specific service within premises including, but not restricted to, building automation, security, access
control, building management, wireless access points, information displays and alarm systems
3.1.2
distributed building service
building service provided to locations additional to those specified in premises-specific standards in
EN 50173 series
3.1.3
network conversion interface
passive or active device allowing the attachment of cabling of different network topologies to a service
concentration point
3.1.4
service area
area in a room or other space where non-user specific equipment is placed and connected to the same SCP
or groups of SOs
3.1.5
service area cord
cord connecting the service outlet to the terminal equipment
3.1.6
service concentration point
connection point in the Type A generic cabling between a service distributor and a service outlet or a
connection point offering connections to terminal equipment at the end of Type B generic cabling
3.1.7
service concentration point cable
cable between a service concentration point and a service outlet
3.1.8
service distribution cable
cable connecting the service distributor to the service outlet(s) or service concentration point(s) of Type A
cabling
3.1.9
service outlet
fixed connecting device where the service distribution cabling terminates
3.2 Abbreviations
For the purposes of this document, the abbreviations given in EN 50173-1 and the following apply.
AV Audio-visual
DAS Distributed Antenna System
OE EQP Opto-electronic equipment
PIR Passive Infrared
RFID Radio Frequency Identification
SCP Service Concentration Point
SD Service Distributor
SO Service Outlet
TE Terminal Equipment
WAP Wireless Access Point
4 Structure of the generic cabling for distributed building services
4.1 General
This clause identifies the functional elements of generic cabling, describes how they are connected together
to form subsystems and identifies the interfaces at which application-specific components are connected to
the generic cabling infrastructure. Applications listed in EN 50173-1:2018, Annex F, are supported by
connecting active equipment to the generic cabling.
In general, all functional elements, subsystems and interfaces from the campus distributor to the floor
distributor as described in EN 50173-1 are applicable.
4.2 Functional elements
4.2.1 Stand-alone structure
In addition to the functional elements specified in EN 50173-1, this European Standard specifies two
implementations of generic cabling for distributed building services. This European Standard enables:
a) Type A generic cabling to the SO;
b) Type B generic cabling to the SCP, thereby providing the opportunity for:
— application-specific cabling to be installed between the SCP and terminal equipment;
— application-specific equipment to be connected at the SCP.
The specification of application-specific cabling and equipment connected to the SCP is outside the scope of
the European Standard.
Type A generic cabling uses the following functional elements and interfaces:
1) service distributor (SD);
2) service distribution cable;
3) service concentration point (SCP);
4) service concentration point cable (SCP cable);
5) service outlet (SO).
Type B generic cabling uses the following functional elements and interfaces:
i) service distributor (SD);
ii) service distribution cable;
iii) service concentration point (SCP).
Groups of these functional elements are connected together with those of EN 50173-1 to form cabling
subsystems (see 4.3).
4.2.2 Overlay structure
The structure of Type A and Type B generic cabling in association with generic cabling of other standards in
EN 50173 series is described in Annex C.
4.3 Structure and hierarchy
4.3.1 Type A generic cabling
4.3.1.1 Stand-alone structure
Type A generic cabling systems contain up to three cabling subsystems: campus backbone, building
backbone and service distribution cabling. The cabling subsystems are connected together to create a
generic cabling system with a structure as shown in Figure 2. The composition of the cabling subsystems is
described in 4.4.1, 4.4.3.1 and 4.4.3.2. The functional elements of the cabling subsystems are interconnected
to form a basic hierarchical topology as shown in Figure 3.
Where the functions of distributors are combined (see 4.8.1), the intermediate cabling subsystem(s) are not
required.
Connections between cabling subsystems are either active, requiring application-specific equipment, or
passive. Connection to application-specific equipment adopts either an interconnect or a cross-connect
approach (see EN 50173-1). Passive connections between cabling subsystems adopt either a cross-connect
approach, by way of either patch cords or jumpers, or an interconnect approach.
The SO shall be connecting hardware in accordance with Clause 8.

Figure 2 — Structure of Type A generic cabling

Figure 3 — Hierarchical structure of Type A generic cabling
4.3.1.2 Overlay structure
The structure of Type A generic cabling in association with generic cabling of other standards in
EN 50173 series is described in Annex C.
4.3.2 Type B generic cabling
4.3.2.1 Stand-alone structure
Type B generic cabling systems contain up to three cabling subsystems: campus backbone, building
backbone and service distribution cabling. The cabling subsystems are connected together to create a
generic cabling system with a structure as shown in Figure 4. The composition of the cabling subsystems is
described in 4.4.3.2, 4.4.3.1 and 4.4.2. The functional elements of the cabling subsystems are interconnected
to form a basic hierarchical topology as shown in Figure 5.

Figure 4 — Structure of Type B generic cabling

Figure 5 — Hierarchical structure of Type B generic cabling
Where the functions of distributors are combined (see 4.8.1), the intermediate cabling subsystem(s) are not
required.
Connections between cabling subsystems are either active, requiring application-specific equipment, or
passive. Connection to application-specific equipment adopts either an interconnect or a cross-connect
approach (see EN 50173-1). Passive connections between cabling subsystems adopt either a cross-connect
approach, by way of either patch cords or jumpers, or an interconnect approach.
4.3.2.2 Overlay structure
The structure of Type B generic cabling in association with generic cabling of other standards in
EN 50173 series is described in Annex C.
4.3.3 Centralized cabling
Centralized cabling structures as shown in Figure 6 combine backbone and service distribution channels. The
channels are provided by passive connections in the distributors. The connections are achieved by using
either cross-connections or interconnections. In addition, for centralized optical fibre cabling, it is possible to
create connections at the distributors using splices although this reduces the ability of the cabling to support
re-configuration.
Figure 6 — Structures for centralized generic cabling
4.4 Cabling subsystems
4.4.1 Service distribution cabling subsystem (Type A generic cabling)
The service distribution cabling subsystem extends from an SD to the SO(s) connected to it. The subsystem
includes:
a) the service distribution cables;
b) the mechanical termination of the service distribution cables at the SO and the SD together with
associated patch cords and/or jumpers at the SD;
c) (an) SCP(s) (optional);
d) the SCP cable(s).
Although service area and equipment cords are used to connect terminal
...