SIST EN IEC 61756-1:2020

Fibre optic interconnecting devices and passive components - Interface standard for fibre management systems - Part 1: General and guidance (IEC 61756-1:2019)

EN-IEC 61756-1 covers general information on fibre management system interfaces. It includes the definitions and rules under which a fibre management system interface is created and it provides also criteria to identify the minimum bending radius for stored fibres. This document allows both single-mode and multimode fibre to be used. Liquid, gas or dust sealing requirements at the cable entry area or cable element ending are not covered in this document.

Lichtwellenleiter - Verbindungselemente und passive Bauteile - Schnittstellennorm für Einzelfasermanagementsysteme - Teil 1: Allgemeines und Leitfaden (IEC 61756-1:2019)

Dispositifs d'interconnexion et composants passifs à fibres optiques - Norme d'interface pour les systèmes de gestion de fibres - Partie 1: Généralités et lignes directrices (IEC 61756-1:2019)

IEC 61767-1:2019 englobe des informations générales sur les interfaces de système de gestion des fibres. Elle comprend les définitions et les règles régissant la création d'une interface de système de gestion des fibres et elle fournit des critères permettant d'identifier le rayon de courbure minimal des fibres stockées. Le présent document permet d'utiliser les fibres unimodales et les fibres multimodales. Les exigences relatives à l'étanchéité aux liquides, aux gaz ou à la poussière au niveau de la zone d'entrée de câble ou à l'extrémité des éléments de câble ne sont pas couvertes par le présent document. Cette deuxième édition annule et remplace la première édition parue en 2006 dont elle constitue une révision technique. La présente édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- ajout de figures de représentation de l'interface entre une enveloppe de protection et le système de gestion des fibres;
- ajout des définitions d'enveloppe de protection, de boîtier, de boîte murale, d'armoire située dans un environnement urbain et de module répartiteur optique;
- ajout d'un tableau qui donne les dimensions des protecteurs d'épissures par fusion et des épissures mécaniques;
- ajout d'une méthode permettant d'identifier le rayon de courbure minimal des fibres stockées;
- ajout d'un article portant sur d'autres facteurs applicables aux systèmes de gestion des fibres;
- ajout de l'Annexe A qui donne un exemple de calcul du rayon de courbure minimal des fibres stockées dans un système de gestion des fibres.
Mots clés : interfaces de système de gestion des fibres, rayon de courbure minimal des fibres stockées

Povezovalne naprave in pasivne komponente optičnih vlaken - Vmesniški standard za sisteme upravljanja z optičnimi kabli - 1. del: Splošno in smernice (IEC 61756-1:2019)

General Information

• Status: Published
• Publication Date: 29-Mar-2020
• ICS: 33.180.01 - Fibre optic systems in general
• ICS: 33.180.20 - Fibre optic interconnecting devices
• Technical Committee: MOC - Mobile Communications
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 12-Mar-2020
• Due Date: 17-May-2020
• Completion Date: 30-Mar-2020
• Ref Project: EN IEC 61756-1:2020 - Fibre optic interconnecting devices and passive components - Interface standard for fibre management systems - Part 1: General and guidance

Relations

• Revised: SIST EN 61756-1:2006 - Fibre optic interconnecting devices and passive components - Interface standard for fibre management systems -- Part 1: General and guidance
• Effective Date: 20-Dec-2016
• Replaces: SIST EN 61756-1:2006 - Fibre optic interconnecting devices and passive components - Interface standard for fibre management systems -- Part 1: General and guidance
• Effective Date: 10-Mar-2020
• Replaces: SIST EN 61756-1:2006 - Fibre optic interconnecting devices and passive components - Interface standard for fibre management systems -- Part 1: General and guidance
• Effective Date: 07-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN IEC 61756-1:2020
01-maj-2020
Nadomešča:
SIST EN 61756-1:2006
Povezovalne naprave in pasivne komponente optičnih vlaken - Vmesniški
standard za sisteme upravljanja z optičnimi kabli - 1. del: Splošno in smernice (IEC
61756-1:2019)
Fibre optic interconnecting devices and passive components - Interface standard for fibre
management systems - Part 1: General and guidance (IEC 61756-1:2019)
Lichtwellenleiter - Verbindungselemente und passive Bauteile - Schnittstellennorm für
Einzelfasermanagementsysteme - Teil 1: Allgemeines und Leitfaden (IEC 61756-1:2019)
Dispositifs d'interconnexion et composants passifs à fibres optiques - Norme d'interface
pour les systèmes de gestion de fibres - Partie 1: Généralités et lignes directrices (IEC
61756-1:2019)
Ta slovenski standard je istoveten z: EN IEC 61756-1:2020
ICS:
33.180.20 Povezovalne naprave za Fibre optic interconnecting
optična vlakna devices
SIST EN IEC 61756-1:2020 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 61756-1:2020


EUROPEAN STANDARD EN IEC 61756-1

NORME EUROPÉENNE

EUROPÄISCHE NORM
March 2020
ICS 33.180.01 Supersedes EN 61756-1:2006 and all of its amendments
and corrigenda (if any)
English Version
Fibre optic interconnecting devices and passive components -
Interface standard for fibre management systems - Part 1:
General and guidance
(IEC 61756-1:2019)
Dispositifs d'interconnexion et composants passifs Lichtwellenleiter - Verbindungselemente und passive
fibroniques - Norme d'interface pour les systèmes de Bauteile - Schnittstellennorm für
gestion de fibres - Partie 1: Généralités et Einzelfasermanagementsysteme - Teil 1: Allgemeines und
recommandations Leitfaden
(IEC 61756-1:2019) (IEC 61756-1:2019)
This European Standard was approved by CENELEC on 2020-01-01. 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,
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
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 61756-1:2020 E

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SIST EN IEC 61756-1:2020
EN IEC 61756-1:2020 (E)
European foreword
The text of document 86B/4228/FDIS, future edition 2 of IEC 61756-1, prepared by SC 86B "Fibre
optic interconnecting devices and passive components" of IEC/TC 86 "Fibre optics" was submitted to
the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 61756-1:2020.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2020-10-01
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2021-01-01
document have to be withdrawn

This document supersedes EN 61756-1:2006 and all of its amendments and corrigenda (if any).
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.

Endorsement notice
The text of the International Standard IEC 61756-1:2019 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60794-2 NOTE Harmonized as EN 60794-2
IEC 60794-3 NOTE Harmonized as EN 60794-3
IEC 60874-1:2011 NOTE Harmonized as EN 60874-1:2012 (not modified)
IEC 61753 (series) NOTE Harmonized as EN 61753 (series)
IEC 62134-1 NOTE Harmonized as EN 62134-1


2

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SIST EN IEC 61756-1:2020
EN IEC 61756-1:2020 (E)
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications
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.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60793-2-10 -  Optical fibres - Part 2-10: Product EN IEC 60793-2-10 -
specifications - Sectional specification for
category A1 multimode fibres
IEC 60793-2-50 -  Optical fibres - Part 2-50: Product EN IEC 60793-2-50 -
specifications - Sectional specification for
class B single-mode fibres



3

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SIST EN IEC 61756-1:2020




IEC 61756-1

®


Edition 2.0 2019-11




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE
colour

inside










Fibre optic interconnecting devices and passive components – Interface

standard for fibre management systems –

Part 1: General and guidance




Dispositifs d'interconnexion et composants passifs fibroniques – Norme

d'interface pour les systèmes de gestion de fibres –


Partie 1: Généralités et recommandations













INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 33.180.01 ISBN 978-2-8322-7511-5




Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN IEC 61756-1:2020
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CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
3.1 Fibre management related definitions . 6
3.2 Component related definitions . 9
3.3 Protective housing related definitions . 11
4 Abbreviated terms . 12
5 Description of a fibre management system . 13
6 Parts and functions of a fibre management system . 14
6.1 General . 14
6.2 Splice trays . 15
6.3 Minimum bending radius for stored fibres . 16
6.4 Splice protector . 19
6.5 Splice holder . 20
6.6 Guiding elements . 21
6.7 Patchcords and pigtails . 22
6.8 Identification of fibres, fibre tubes or single elements . 22
7 Other factors relevant to fibre management systems . 22
7.1 Re-entry and access . 22
7.2 Quality of mouldings . 22
7.3 Polymer materials . 22
7.4 Marked or colour coded parts . 22
Annex A (informative) Use of flow chart for calculation of the minimum bending radius
for stored fibres . 23
A.1 Example of calculation minimum bending radius . 23
A.2 Results for various fibre types with a 1 m storage length . 28
A.3 Results for various fibre types with 2 m storage length . 29
Bibliography . 31

Figure 1 – Multiple element management system . 7
Figure 2 – Single circuit management system. 8
Figure 3– Single element management system . 8
Figure 4– Patchcord . 11
Figure 5– Pigtail . 11
Figure 6 – Functional parts diagram of a protective housing. 13
Figure 7 – Functional parts diagram of FMS . 14
Figure 8 – Typical required failure probabilities of various networks . 17
Figure 9 – Lifetimes per bent fibre metre versus failure probability for various
bending radii . 18
Figure 10 – Flow chart for minimum bending radius of stored fibres . 19
Figure 11 – F type splice protector . 20
Figure 12– S type splice protector. 20
Figure 13 – M type fibre splice . 20

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Figure A.1 – Step 1: Find radius that matches the failure probability target requirement. 23
Figure A.2 – Find bending radius for specified failure probability target and fibre length . 24
Figure A.3 – Step 2: Estimate the maximum attenuation increase for bending radius . 25
Figure A.4 – Estimated maximum attenuation increase for bending radius of 15 mm . 25
Figure A.5 – Step 3: Compare estimated maximum attenuation with requirement . 26
Figure A.6 – Estimated attenuation increase for bending radius of 20 mm . 27
Figure A.7 – Step 5: Check the estimated attenuation with requested maximum limit . 28
Figure A.8 – Estimated maximum attenuation increase for bending radius . 29

Table 1 – Optical fibre fusion splice protectors – Outline and nominal dimensions . 20
Table 2 – Mechanical fibre splices – Outline and nominal dimensions . 20
Table A.1 – Minimum bending radius for storage of the various fibre types with typical
mechanical failure probability targets for different network locations and fibre storage

length of 1 metre and maximum attenuation increase of 0,05 dB at 1 625 nm . 29
Table A.2 – Minimum storage radius for the various fibre types with typical mechanical
failure probability targets for different network locations and fibre storage length of 2
metres and maximum allowed attenuation increase of 0,1 dB at 1 550 nm . 30

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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
INTERFACE STANDARD FOR FIBRE MANAGEMENT SYSTEMS –

Part 1: General and guidance

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61756-1 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
This second edition cancels and replaces the first edition published in 2006. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) addition of figures to show the interface between protective housing and fibre management
system;
b) addition of definitions for protective housing, closure, box, street cabinets and optical
distribution frame modules;
c) addition of table with dimensions of fusion splice protectors and mechanical splices;
d) addition of method to identify the minimum bending radius for stored fibres;

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e) addition of clause for other factors relevant to fibre management systems;
f) addition of annex A for example of calculating the minimum bending radius of stored fibres
in a fibre management system.
The text of this International Standard is based on the following documents:
FDIS Report on voting
86B/4228/FDIS 86B/4240/RVD

Full information on the voting for the approval of this International Standard can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

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FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
INTERFACE STANDARD FOR FIBRE MANAGEMENT SYSTEMS –

Part 1: General and guidance



1 Scope
This part of IEC 61756 covers general information on fibre management system interfaces. It
includes the definitions and rules under which a fibre management system interface is created
and it provides also criteria to identify the minimum bending radius for stored fibres.
This document allows both single-mode and multimode fibre to be used.
Liquid, gas or dust sealing requirements at the cable entry area or cable element ending are
not covered in this document.
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.
IEC 60793-2-10, Optical fibres - Part 2-10: Product specifications - Sectional specification for
category A1 multimode fibres
IEC 60793-2-50, Optical fibres - Part 2-50: Product specifications - Sectional specification for
class B single-mode fibres
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1 Fibre management related definitions
3.1.1
distribution element
element for a fibre management system providing fibre branching, holding and distribution
function
3.1.2
fibre management system
system to control, protect and store splices, connectors, passive optical components and fibres
from incoming to outgoing cables

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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".
3.1.3
multiple element
physical fibre separation level consisting of more than one single element
Note 1 to entry: This separation level has fibres from multiple cable elements on one splice tray and is also called
mass storage. It is the lowest (worst) degree of physical circuit separation.
3.1.4
multiple element management system
system which provides all necessary equipment to connect a defined number of incoming and
outgoing fibres/cables
Note 1 to entry: It comprises storage and protection of fibres/ribbons and interconnections in one tray for more than one
single element (see Figure 1).
Note 2 to entry: There are many different names for this structure, for example " mass storage". In this document,
" multiple element" will be used.

Figure 1 – Multiple element management system
3.1.5
multiple ribbon
multiple element consisting of multiple optical fibres (circuits) arranged in ribbons (fibres in
parallel) which are also arranged (for example, in stacks)
3.1.6
optical performance stability
stability of the system to transient loss introduced by external disturbances of the fibres
3.1.7
single circuit
physical fibre separation level where the optical circuit consists of one fibre (single fibre), or
more than one fibre, providing all services for one subscriber
Note 1 to entry: This fibre separation level has the fibre(s) of only one customer on one splice tray. It is the highest
(best) degree of physical circuit separation.
3.1.8
single circuit management system
system which provides all necessary equipment to connect a defined number of incoming and
outgoing fibres/cables

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Note 1 to entry: It comprises storage and protection of fibres/ribbons and interconnections with one single circuit
per splice tray (Figure 2).
Note 2 to entry: Disturbance of operational circuits by accessing any other adjacent circuit should be minimised.
The disturbance should stay within allowable tolerances given in related performance standards.

Figure 2 – Single circuit management system
3.1.9
single element
physical fibre separation level in the cable subassembly comprising one or more optical fibres
inside a common covering for example in a tube or inside one groove of a grooved cable (slotted
core cable)
Note 1 to entry: A single element provides services to more than one subscriber.
Note 2 to entry: This fibre separation level has all fibres from a cable element (e.g. loose tube) on one splice tray.
It is an intermediate degree of physical circuit separation (between single circuit and multiple element).
3.1.10
single element management system
system which provides all necessary equipment to connect a defined number of incoming and
outgoing fibres/cables
Note 1 to entry: It comprises storage and protection of fibres/ribbons and interconnections in one tray for each
single element (see Figure 3).

Figure 3– Single element management system
3.1.11
single ribbon
single element designed to carry all fibres of one ribbon

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Note 1 to entry: Depending on the fibres deployment’, a single ribbon can contain all the fibres of one circuit (single
circuit) or the fibres of more than one circuit (single element).
3.1.12
splice tray
structure that organises and controls storage of fibre splices in an orderly manner, together with
the associated excess uncabled fibre length
Note 1 to entry: It can be a part of a fibre management system.
3.1.13
transient loss
short term (ms) reversible change of optical transmission characteristics arising from optical
discontinuity, physical defects and modifications of the attenuation (e.g. bending loss) normally
caused by mechanical stress
3.1.14
uncut fibre
fibres from a continuous cable with the cable sheath removed over a defined length without
cutting the fibres or tubes
Note 1 to entry: The uncut tubes or fibres are stored e.g. in a space saving loop. When required, the fibres are cut
and spliced or connected.
3.2 Component related definitions
3.2.1
active optical component
optical component exhibiting one or more of the following functions:
– generation or detection of optical power;
– conversion of an electronic signal to a corresponding optical one or vice versa;
– optical amplification or optical regeneration (2R or 3R) of an optical signal;
– direct conversion of the optical frequency of an optical signal
3.2.2
adapter
component in which two or more ferrules are aligned
Note 1 to entry: A ferrule is the fibre holding component part of the plug.
[SOURCE: IEC 60874-1:2011, 3.1, modified – The note has been added.]
3.2.3
fan-out
passive optical component providing a transition between a single ribbon or single element into
individual fibres
3.2.4
fusion splice
permanent joint accomplished by the application of localised heat sufficient to fuse or melt the
ends of two lengths of optical fibre, to produce a continuous single optical fibre
[SOURCE: IEC 60050-731:1991, 731-05-06, modified – The words "a splice" has been replaced
by "permanent joint".]
3.2.5
fusion splice protector
component which protects the weak fusion zone and the bare fibres of a fusion splice

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Note 1 to entry: The most common types used in fibre management systems are heat shrinkable or mechanical
fusion splice protectors.
3.2.6
live fibre
transmitting fibre
fibre optical circuit that is carrying an optical signal
3.2.7
mechanical splice
fibre splice accomplished by fixtures or materials, rather than by thermal fusion
[SOURCE: IEC 60050-731:1991, 731-05-07]
3.2.8
non-transmitting fibre
optical circuit that is not carrying an optical signal
3.2.9
optical connector set
complete assembly of components required to provide demountable coupling between optical
fibres
[SOURCE: IEC 60874-1:2011, 3.15, modified – The word "fibre" has been deleted from the term,
and the definition has been rephrased.]
3.2.10
optical fibre connector
component normally attached to an optical cable or piece of apparatus for the purpose of
providing optical interconnection and disconnection of optical fibres or cables
Note 1 to entry: The interconnection usually consists of two plugs mated together in an adapter or 1 plug mated in
a socket.
[SOURCE: IEC 60050-731:1991, 731-05-01, modified – The definition has been rephrased, and
the note added.]
3.2.11
optical fibre splice
permanent or separable joint whose purpose is to couple optical power between two optical
fibres, realised by either a fusion or a mechanical technique
[SOURCE: IEC 60050-731, 731-05-05, modified – The words "or separable" and "realised by
either a fusion or a mechanical technique" have been added.]
3.2.12
passive optical component
optical component or assembly which does not require any source of energy for its operation
other than optical input signals
Note 1 to entry: A passive optical component might need external power to control the stability of its optical
characteristics. Example is controlling the temperature of the component.
Note 2 to entry: A passive optical component never generates an optical gain of signal power.
[SOURCE: IEC TS 62538 modified]
3.2.13
patchcord
length of optical fibre or cable, permanently t
...