SIST EN 50700:2023

SLOVENSKI STANDARD
01-december-2023
Informacijska tehnologija - Okabljenje prostorov z distribucijskim dostopovnim
omrežjem v podporo gradnji optičnih širokopasovnih omrežij
Information technology - Premises distribution access network (PDAN) cabling to support
deployment of optical broadband networks
Informationstechnik - Standortverkabelung als Teil des optischen Zugangsnetzes von
optischen Breitbandnetzen
Technologies de l'information - Câblage du réseau de distribution privé du réseau
d'accès dans les locaux (PDAN) supportant le déploiement des réseaux optiques à large
bande
Ta slovenski standard je istoveten z: EN 50700:2023
ICS:
35.110 Omreževanje Networking
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50700
NORME EUROPÉENNE
EUROPÄISCHE NORM October 2023
ICS 35.110 Supersedes EN 50700:2014
English Version
Information technology - Premises distribution access network
(PDAN) cabling to support deployment of optical broadband
networks
Technologies de l'information - Câblage du réseau de Informationstechnik - Standortverkabelung als Teil des
distribution privé du réseau d'accès dans les locaux optischen Zugangsnetzes von optischen Breitbandnetzen
(PDAN) supportant le déploiement des réseaux optiques à
large bande
This European Standard was approved by CENELEC on 2023-07-04. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye 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
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50700:2023 E
Contents Page
European foreword . 5
1 Scope . 11
2 Normative references. 11
3 Terms, definitions and abbreviations . 12
3.1 Terms and definitions . 12
3.2 Abbreviations . 15
4 Conformance . 15
5 Structure of PDAN cabling within multi-subscriber premises . 16
5.1 General . 16
5.2 Functional elements . 16
5.3 General structure and hierarchy . 16
5.4 Cabling subsystems . 18
5.4.1 External cabling subsystem . 18
5.4.2 Internal cabling subsystem . 18
5.5 Design objectives . 18
5.6 Accommodation of functional elements . 19
5.6.1 Fibre management systems providing protection to optical fibre cables and cable
elements . 19
5.6.2 Example configuration of multi-subscriber premises . 19
5.6.3 Example configuration of subscriber premises connected to FTTH networks . 20
5.7 Interfaces . 20
5.7.1 Equipment interfaces and test interfaces . 20
5.7.2 Cabling . 21
5.8 Dimensioning and configuring . 21
5.8.1 Premises dimensions . 21
5.8.2 Distributors . 21
5.8.3 Subscriber interface (SI) . 21
5.8.4 Operator access point (OAP) . 22
5.8.5 External network test interface (ENTI) . 22
5.8.6 Entrance facilities . 23
6 PDAN cabling performance . 23
6.1 General . 23
6.2 Environmental performance . 23
6.3 Transmission performance . 24
6.3.1 Optical return loss . 24
6.3.2 Attenuation . 24
7 Implementation options . 24
8 Cable requirements . 25
8.1 General . 25
8.2 Cable . 25
9 Connecting hardware requirements . 25
9.1 General requirements . 25
9.2 Connecting hardware at the SI . 25
9.3 Connecting hardware at other places . 26
9.3.1 Plugs and adaptors . 26
9.3.2 Mechanical and fusion splices . 26
10 Cords . 26
11 Accommodation of the subscriber interface (SI) and the customer premises equipment (CPE)
11.1 Security for data integrity . 26
11.2 Placement of the housing . 27
Annex A (informative) Broadband infrastructure external to multi-subscriber premises . 28
Annex B (informative) Example implementation of PDAN in multi-tenant premises . 29
Annex C (informative) Example implementation of PDAN in privately managed real estate . 32
Annex D (informative) Example implementation of PDAN cabling connecting a single subscriber
premises . 37
Annex E (informative) A-deviation . 39
Bibliography . 41
Figures
Figure 1 — Multi-subscriber PDAN cabling (LOC external to the premises) . 7
Figure 2 — Example of multi-subscriber PDAN cabling (LOC internal to the premises) . 7
Figure 3 — Schematic relationship between EN 50700 and other relevant TC 215 standards . 9
Figure 4 — PDAN cabling distribution schematic with future LOC external to premises . 17
Figure 5 — PDAN cabling distribution schematic with ADP (and future LOC) internal to premises . 17
Figure 6 — PDAN cabling distribution schematic with ADP (and future LOC) internal to multi-subscriber
building . 17
Figure 7 — Example of accommodation of functional elements . 20
Figure 8 — Test and equipment interfaces . 20
Figure 9 — SI connection to the customer network . 22
Figure 10 — Examples of arrangements of SI, OAP and ENTI . 22
Figure 11 — Examples of SI configuration of passive PDAN cabling . 23
Figure A.1 — Broadband optical fibre cabling to subscriber premises . 28
Figure B.1 — Example implementation – multi-tenant premises on a campus . 29
Figure C.1 — Schematic with key used in figures of Annex C . 32
Figure C.2 — Example implementation - pre-construction in small areas . 33
Figure C.3 — Example implementation — pre-construction in larger areas . 33
Figure C.4 — Example implementation — construction in small areas . 34
Figure C.5 — Example implementation — construction in large areas . 35
Figure D.1 — Example implementation of PDAN cabling connecting a single subscriber premises . 37
Tables
Table 1 — Contextual relationship between EN 50700 and other relevant TC 215 standards . 10
Table 2 — PDAN cabling attenuation . 24
European foreword
This document (EN 50700:2023) has been prepared by CLC/TC 215 “Electrotechnical aspects of
telecommunication equipment”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2024-04-20
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2026-10-20
conflicting with this document have to be
withdrawn
This document supersedes EN 50700:2014.
a) Annex B to Annex D with example implementations of PDAN in multi-tenant premises, in privately
managed real estate and in local to single subscriber premises, respectively, added;
b) editorial improvements as appropriate;
c) A-deviations for France updated, A-deviations for Finland and Spain added.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN-CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN and CENELEC
websites.
Introduction
This document has been developed to enable the application of system-independent pre-cabling of multi-
subscriber premises to enable the delivery of broadband telecommunication services.
Fibre to the home (FTTH) is the subject of standardization in the form of:
— Technical Reports such as CLC/TR 50510 which cover general concepts and system planning;
— component standards that support its implementation;
— installation standards such as the EN 50174 series.
FTTH is a general term applied to the provision of broadband optical networks to residential premises. Some
premises accommodate multiple subscribers and these may be residential or commercial enterprises such
as offices, data centres, industrial, retail or a mix of these subscriber types. These multi-subscriber premises
may consist of one or more buildings.
Multi-subscriber premises also include areas of privately managed real estate comprising multiple individual
premises which themselves can house single or multiple subscribers.
NOTE Annex D describes the connection of individual subscribers directly to FTTH networks using the terminology
of this document.
The cabling specified in this document:
— constitutes the part of the broadband access network within multi-subscriber premises termed the
premises distribution access network (PDAN); the access network serving single subscriber premises is
not normatively addressed in this document;
— is intended to be pre-installed, in readiness for subsequent connection of the multi-subscriber premises,
to an access provider’s infrastructure to an access demarcation point (ADP) - enabling broadband
content to be delivered by the service provider(s).
Within premises, the importance of the information technology cabling infrastructure is similar to that of other
fundamental building utilities such as heating, lighting and mains power. As with other utilities, interruptions
to service can have a serious impact. Poor quality of service due to lack of design foresight, use of
inappropriate components, incorrect installation, poor administration or inadequate support can disrupt
service delivery.
This document:
— allows access providers to be aware of the minimum implementation delivered to them when they reach
such multi-subscriber premises;
— maximizes the opportunity for network evolution by either the access provider or the service providers
using that access infrastructure.
This document specifies the cabling between the access demarcation point (ADP) and the subscriber
interface (SI). The transmission performance of the premises cabling between the last operator connection
point (LOC) and the ADP is not addressed although the requirements for its accommodation are provided by
external reference to the EN 50174 series. The location of the LOC can be either outside the premises’
boundary (see the schematic in Figure 1) or inside the premises, internal or external to a building (see the
schematic in Figure 2).
Figure 1 — Multi-subscriber PDAN cabling (LOC external to the premises)

Figure 2 — Example of multi-subscriber PDAN cabling (LOC internal to the premises)
Where the subscribers’ premises are homes, the design of generic cabling beyond the SI is specified in
EN 50173-4. CLC/TR 50173-99-2 and CLC/TR 50173-99-3 provide additional information in relation to
cabling design within homes. For other types of subscribers, the design of generic cabling beyond the SI is
specified in other documents in the EN 50173 series.
This document provides:
a) access providers with an application independent optical fibre cabling subsystem;
b) an open market for cabling components;
c) building professionals (for example, architects) with guidance for the accommodation of cabling and
interfaces before specific requirements are known; i.e. in the initial planning either for construction or
refurbishment.
This document specifies multi-vendor cabling, and is related to:
— standards for cabling components developed by Technical Committees of CENELEC and/or IEC;
— standards for the quality assurance and installation of information technology cabling (EN 50174 series)
and testing of installed cabling (ISO/IEC 14763-3);
— applications developed by ETSI and Study Groups of ITU-T.
Figure 3 and Table 1 show the schematic and contextual relationships between the standards produced by
TC 215 for information technology cabling, namely:
1) the EN 50173 series where this standard interfaces to the subscriber;
2) installation (EN 50174 series).
Figure 3 — Schematic relationship between EN 50700 and other relevant TC 215 standards
Table 1 — Contextual relationship between EN 50700 and other relevant TC 215 standards
PDAN cabling design Specification phase Installation phase Operation phase
phase
EN 50700 EN 50174-1  EN 50174-1
5: Structure of PDAN cabling 4 Requirements for  4: Requirements for
within multi-subscriber specifying installations of specifying installations of
premises information technology information technology
cabling cabling
6: PDAN cabling
performance 5: Requirements for
installers of information
7: Implementation options
technology cabling
8: Cable requirements
9: Connecting hardware
requirements
Planning phase
EN 50174-2 EN 50174-2
4: Requirements for 5: Requirements for the
planning installations of installation of information
information technology technology cabling
cabling
6: Segregation of metallic
6: Segregation of metallic information technology
information technology cabling and power supply
cabling and power supply cabling
cabling
8: Office (commercial)
7: Electricity distribution premises
systems and lightning
9: Industrial premises
protection
10: Homes
8: Office (commercial)
premises
11: Data centres
9: Industrial premises
12: Multi-tenant pathways
and spaces
10: Homes
11: Data centres
12: Multi-tenant pathways
and spaces
and and
EN 50174-3 EN 50174-3
4. Requirements for 4. Requirements for
planning installations of planning installations of
information technology information technology
cabling cabling
5. Requirements for the 5. Requirements for the
installation of information installation of information
technology cabling technology cabling
6. Segregation 6. Segregation
7. Additional installation 7. Additional installation
practices for specific sites practices for specific sites
and services and services
1 Scope
This document specifies the optical fibre access network cabling within single- and multi-subscriber premises
termed the premises distribution access network (PDAN). The premises can comprise single or multiple
buildings.
The cabling specified is intended to be pre-installed, in readiness for subsequent connection of the multi-
subscriber premises to an access providers infrastructure to support deployment of optical broadband
networks.
This document does not specify either the access network cabling external to the premises or the cabling
within the subscriber space for onward distribution of services beyond the customer premises equipment.
This document specifies:
a) the structure and configuration of the optical fibre cabling;
b) cabling performance requirements;
c) implementation options.
Annex A contains information on network segments not covered by this document.
Safety practices in relation to optical power hazard are specified in EN 60825-2. Optical powers higher than
the hazard levels specified in EN 60825-2 are not considered in this document.
Safety (electrical safety, fire, etc.) 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.
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 50411-3-2:2011, Fibre organisers and closures to be used in optical fibre communication systems -
Product specifications - Part 3-2: Singlemode mechanical fibre splice
EN IEC 60793-2-50:2019, Optical fibres - Part 2-50: Product specifications - Sectional specification for class
B single-mode fibres (IEC 60793-2-50:2012)
EN 61754-20:2012, Fibre optic interconnecting devices and passive components - Fibre optic connector
interfaces - Part 20: Type LC connector family (IEC 61754-20:2012)
EN 61755-1:2006, Fibre optic connector optical interfaces - Part 1: Optical interfaces for single mode non-
dispersion shifted fibres - General and guidance (IEC 61755-1:2005)
EN 61755-2-2:2006, Fibre optic connector optical interfaces - Part 2-2: Optical interface standard single
mode angled physically contacting fibres (IEC 61755-2-2:2006)
ISO/IEC 14763-3, Information technology — Implementation and operation of customer premises cabling —
Part 3: Testing of optical fibre cabling
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document the following terms and definitions 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
access demarcation point
location from which premises distribution access network cabling is routed to subscribers
3.1.2
access network
functional elements (equipment and infrastructure) that enable communication between the core network and
a customer network
[SOURCE: EN 50174-3:2013, 3.1.1]
3.1.3
access provider
operator or another entity providing the means to enable external telecommunications service provision to a
subscriber
[SOURCE: EN 50174-3:2013, 3.1.2]
3.1.4
building entrance facility
facility that provides all necessary mechanical and electrical services for the entry of telecommunication
cables into a building and which can enable transition from outdoor to indoor cable
[SOURCE: EN 50173-1:2018, 3.1.18]
3.1.5
cabling
system of telecommunications cables, cords and connecting hardware that supports the operation of
information technology equipment
[SOURCE: EN 50173-1:2018, 3.1.23]
3.1.6
core network
functional elements (that is equipment and infrastructure) that enable communication between operator sites
and/or network data centres
[SOURCE: EN 50174-3:2013, 3.1.7]
3.1.7
customer network
functional elements (equipment and infrastructure) that enable communication between the subscriber
interface and one or more attached terminal equipment
3.1.8
customer premises equipment
CPE
equipment, not owned by subscribers, that is located on the customer's premises
3.1.9
distribution access network
sub-part of the access network comprising the functional elements that enable communication between the
last operator connection point and the subscriber interface
3.1.10
equipment interface
point at which application-specific equipment can be connected to the generic cabling or network access
cabling
[SOURCE: EN 50173-1:2018, 3.1.41]
3.1.11
external network test interface
point in or near the customer premises accessible to the network operator for testing purposes
[SOURCE: ETSI TS 105 174-1:2009, 3.1, modified: deleted “(inside or outside the customer network)”]
3.1.12
fibre management system
system to control, protect and store splices, connectors, passive optical components and fibres from
incoming to outgoing cables
Note 1 to entry: A fibre management system is intended for installation within a protective housing.
Note 2 to entry: A fibre management system is often called an “organiser”.
[SOURCE: EN IEC 61756-1:2020, 3.1.2]
3.1.13
last operator connection point
interface to the transport access networks of one or more operators from which cabling is routed to the
access demarcation point (ADP) of the premises distribution access network cabling
3.1.14
multi-building subscriber
subscriber accommodated in more than one building within the premises
3.1.15
multi-subscriber premises
premises which are designed to accommodate more than one subscriber
Note 1 to entry: Areas of privately managed real estate accommodating one or more individual premises are included in
this definition.
3.1.16
operator access point
optional functional element of the premises distribution access network which allows a service provider to
install an external network test interface between the subscriber interface and the access demarcation point
3.1.17
operator site
premises accommodating network telecommunications equipment providing direct connection to the core
and access networks and which may also accommodate information technology equipment
[SOURCE: ETSI TR 105 174-2-1:2009, 3.1]
3.1.18
premises distribution access network
sub-part of the access network within multi-subscriber premises comprising the functional elements that
enable communication between the access demarcation point and the subscriber interface
3.1.19
primary distributor
distributor in which the cable(s) from the access demarcation point is distributed onward to the secondary
distributor(s), if present, or the subscriber interface
3.1.20
secondary distributor
distributor in which the cable(s) from the primary distributor, or another secondary distributor, is (are)
distributed onward to other secondary distributor(s), if present, or the subscriber interface
3.1.21
service provider
operator of any service that furnishes telecommunications content (transmissions) delivered over access
provider facilities
Note 1 to entry: The access provider and the service provider can be a single entity.
[SOURCE: EN 50174-3:2013, 3.1.15]
3.1.22
single-subscriber premises
premises which are designed to accommodate a single subscriber
3.1.23
subscriber
identifiable entity within the premises that may require a future direct connection to the access network
3.1.24
subscriber entrance facility
facility that provides all necessary mechanical and electrical services for the entry of cables into a subscriber
space
3.1.25
subscriber interface
point where the customer premises equipment is connected to the premises distribution access network
cabling
3.1.26
subscriber space
space within the premises allocated to a subscriber
3.1.27
test interface
point at which test equipment can be connected to the premises distribution access network cabling
3.1.28
transport access network
sub-part of the access network comprising the functional elements that enable communication between the
core network and the last operator connection point
3.2 Abbreviations
For the purposes of this document, the following abbreviations apply.
ADP access demarcation point
BEF building entrance facility
CPE customer premises equipment
EI equipment interface
ENTI external network test interface
FTTH fibre to the home
LOC last operator connection point
OAP operator access point
PD primary distributor
PDAN premises distribution access network
SD secondary distributor
SEF subscriber entrance facility
SI subscriber interface
TI test interface
WDM wave length division multiplexing
4 Conformance
For a cabling system to conform to this document:
a) the structure and configuration shall conform to the requirements of Clause 5;
b) the optical fibres and cables shall conform to the requirements of Clause 8;
c) the interfaces to the cabling at the subscriber interface (SI) shall conform to the requirements of 9.2 with
respect to mating interfaces and performance;
d) connecting hardware at other places shall conform to Clause 9;
e) the performance of the cabling shall conform to the requirements of Clause 6.
Local regulations including safety regulations can exist.
In addition, the requirements of the EN 50174 series of standards shall be met.
The test parameters to be measured and the sampling levels 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.
The treatment of measured results that fail to meet the requirements of this clause, or lie within the relevant
measurement accuracy, shall be clearly documented within a quality plan as described in EN 50174-1.
Test methods to ensure conformance with cabling requirements of Clause 6 are specified in
ISO/IEC 14763-3.
5 Structure of PDAN cabling within multi-subscriber premises
5.1 General
This clause identifies the functional elements of the PDAN cabling, describes how they are connected
together to form subsystems and identifies the interfaces at which application-specific components are
connected.
5.2 Functional elements
This document specifies the following functional elements and interfaces:
a) access demarcation point (ADP);
b) distribution branching cable;
c) primary distributor (PD);
d) primary branching cable;
e) secondary distributor (SD);
f) secondary branching cable;
g) operator access point (OAP);
h) operator access point cable;
i) subscriber interface (SI);
j) outdoor cable;
k) indoor cable.
The OAP is an optional functional element within the PDAN cabling and is used to enable a service provider
to install an external network test interface (ENTI) typically adjacent to the SI. The OAP potentially degrades
the transmission performance of the PDAN and should only be installed where there is evidence to suggest
that at least one potential service provider may require such an ENTI design (see 5.8.5).
Groups of these functional elements are connected together to form cabling subsystems (see 5.3).
5.3 General structure and hierarchy
PDAN cabling systems contain up to two cabling subsystems: external cabling and internal cabling.
The composition of the cabling subsystems is described in 5.4.1 and 5.4.2.
Where the last operator connection point (LOC) is external to the premises, the cabling subsystems are
connected together to create a cabling system with a structure as shown in Figure 4.
Where the LOC is located within the premises but external to a building, the cabling subsystems are
connected together to create a cabling system with a structure as shown in Figure 5.
Where the LOC is located within the premises and internal to a multi-subscriber building, the cabling
subsystems are connected together to create a cabling system with a structure as shown in Figure 6.
Figure 4 — PDAN cabling distribution schematic with future LOC external to premises

Figure 5 — PDAN cabling distribution schematic with ADP (and future LOC) internal to premises

Figure 6 — PDAN cabling distribution schematic with ADP (and future LOC) internal to
multi-subscriber building
The ADP may be co-located with the PD. SDs are implemented as required. There is no restriction on the
number of SDs between the PD and the SI provided that the performance requirements of 6.3 are met.
See 5.8.2 for the minimum number of functional elements.
Where the ADP is co-located with a building entrance facility (BEF), there is no external cabling subsystem.
Where an SI is co-located with a building entrance facility (BEF), there is no internal cabling subsystem.
Distributors shall not contain any system specific components such as passive splitters or WDM components
and there is a direct connection for each optical fibre between an SI and the ADP in all the configurations
(Figure 4, Figure 5 and Figure 6).
5.4 Cabling subsystems
5.4.1 External cabling subsystem
The external cabling subsystem extends from the ADP (in Figure 4 and Figure 5) to the distributor
associated with a BEF. When present, the subsystem includes:
a) the cables outside the building and extending into the building, through the BEF to the distributor
associated with the BEF;
b) any cabling components in the distributors outside the building.
The cabling subsystems may comprise:
— optical fibre cables which are spliced or terminated with connectors at the distributors to allow:
— the re-distribution of the number of optical fibres within the cables (e.g. one cable containing 24
optical fibres divided into 6 cables containing 4 optical fibres);
— a change of cable construction;
— microduct fibre units or optical fibre cables that are installed within microducts that are connected at the
distributors to allow:
— the re-distribution of the number of microducts in the distribution system (e.g. 2 microducts are split
from a bundle of 8 microducts);
— a change of microduct construction.
Where the premises comprise a single multi-subscriber building, the BEF may be at the premises boundary
(see Figure 7).
5.4.2 Internal cabling subsystem
The internal cabling subsystem extends from the distributor associated with a BEF (in Figure 4 and Figure 5)
or the ADP associated with a BEF (in Figure 6) to the SI. The subsystem includes:
a) the cables inside the building (indoor cables) between the distributors (in Figure 4 and Figure 5) or the
ADP (in Figure 6) associated with a BEF and the SI;
b) any cabling components in SDs inside the building;
c) the mechanical termination of the cables at the SI.
The cabling subsystems comprise optical fibre cables which are spliced or terminated with connectors at the
distributors to allow:
1) the re-distribution of the number of optical fibres within the cables (e.g. one cable containing 24 optical
fibres divided into 6 cables containing 4 optical fibres);
2) a change of cable construction.
Where the premises comprises a single multi-subscriber building, the BEF may be at the premises boundary.
In such cases, the PD replaces the SD associated with the BEF for this subclause.
Where the premises contain multiple single subscriber buildings the SEF in each building replaces the BEF.
5.5 Design objectives
The cabling specified provides the service provider with an optical transmission performance capable of
supporting the broadest set of existing and emerging applications within the environmental conditions
defined in 6.2 and therefore provides the longest operational life. This will minimize disruption and the high
cost of re-cabling.
The design of pathways and spaces shall consider the risks to services to subscribers associated with
unauthorised access (e.g. eavesdropping or denial of-service).
The installation of additional pathways to enable the installation of additional pathway systems and/or cables
should be considered (see EN 50174-2 and EN 50174-3 for planning information).
5.6 Accommodation of functional elements
5.6.1 Fibre management systems providing protection to optical fibre cables and cable elements
Fibre management systems are used to provide protection to optical fibres cables and cable elements at the
following functional elements:
a) ADP,
b) PD,
c) SD,
d) OAP,
e) SI.
At all locations other than the SI, the closures used shall ensure that the minimum bend radius applied to the
optical fibre cables or cable elements shall be 30 mm.
At the SI, the closure used shall ensure that the minimum bend radius applied to the optical fibre cables or
cable elements shall be 20 mm.
Lower minimum bend radii may be applied provided that a risk assessment has been undertaken with regard
to the total length of optical fibre subjected to such bends between the ADP and the SI.
5.6.2 Example configuration of multi-subscriber premises
Figure 7 shows an example of how the functional elements are accommodated within multi-subscriber
premises.
Figure 7 — Example of accommodation of functional elements
For examples of the arrangements of SI, OAP and ENTI see Figure 10.
Annex B describes the implementation of PDAN in multi-subscriber premises comprising a single building by
the construction of an optical fibre “riser” or backbone serving the individual subscribers.
Annex C describes the implementation of PDAN in areas of privately managed real estate under construction
which comprises, or is planned to comprise, multiple premises accommodating individual subscribers.
5.6.3 Example configuration of subscriber premises connected to FTTH networks
Annex D extends the concept of PDAN cabling to connect a single subscriber premises to access networks.
5.7 Interfaces
5.7.1 Equipment interfaces and test interfaces
Equipment interfaces (EI) and test interfaces (TI) to the PDAN cabling are shown in Figure 8.

Figure 8 — Test and equipment interfaces
An equipment interface exists at the SI.
Test interfaces to the PDAN cabling exist at the ends of the complete cabling subsystem i.e. at the SI and at
the optical fibre end-face prior to connection to the access network at the ADP. If it is required to measure
the transmission performance of the PDAN cabling using techniques in accordance with ISO/IEC 14763-3
(see 6.3), it can be necessary to terminate the optical fibre at the ADP with appropriate connecting hardware.
There is no test interface for the PDAN cabling at the OAP. The OAP enables a service provider to install an
ENTI within the PDAN cabling which may then be used to perform a testing function on the complete access
network as configured by the service provider.
5.7.2 Cabling
PDAN cabling is, if required, an application-independent cabling system that may be tested between the
specific test interfaces as detailed in Clause 6.
Once connected to an operator’s access network at the ADP, the PDAN cabling is part of the complete
access network transmission path and extends from the operator site via the LOC to the customer premises
equipment (CPE). The transmission performance of the PDAN cabling within the complete access network is
not specified in this document and depends on the configuration of the access network and any connections
of that access network at the OAP.
Figure 8 indicates that the interface at the SI is a defined optical fibre connector interface. The interface at
the ADP may be either an unterminated optical fibre or, if testing in accordance with ISO/IEC 14763-3 is
required, an optical fibre terminated with appropriate connecting hardware.
5.8 Dimensioning and configuring
5.8.1 Premises dimensions
In order to meet the performance requirements of 6.3 (Table 2), the maximum length of cabling from the ADP
to the SI shall not exceed 500 m.
Any premises requiring longer cabling lengths will increase the attenuation of the PDAN cabling. Such
configurations should not be pre-cabled without agreement with the access provider and may involve
premises-specific implementations.
5.8.2 Distributors
The number and type of subsystems that are included in the PDAN cabling implementation depends upon
the geography and size of the premises (e.g. campus or building) and upon the strategy of the premises’
owner.
A minimum implementation would include one PD, one SD per building, and one SI per subscriber.
If the premises is small enough and contain only a single building, the SD of that building may function as the
PD (without the need for an external cabling subsystem). In contrast, larger premises/buildings may be
served by a series of SDs.
Distributors should be located such that the resulting cable lengths are consistent with the cabling
performance requirements of Clause 6, taking account of any connecting hardware installed within the
distributors.
5.8.3 Subscriber interface (SI)
A subscriber interface shall comprise at least
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