IEC 61753-031-6:2014

Fibre optic interconnecting devices and passive components - Performance standard - Part 031-6: Non-connectorized single-mode 1×N and 2×N non-wavelength-selective branching devices for Category O - Uncontrolled environment

IEC 61753-031-6:2014 contains the minimum initial tests and measurement requirements and severities which a non-wavelength selective branching device (NWBD) should satisfy in order to be categorized as meeting the requirements of this standard. The requirements cover balanced bidirectional non-connectorized single-mode 1xN and 2xN non-wavelength-selective branching devices for use in an IEC category O environment (N is the number of branching ports), especially but not exclusively used for PON application. For balanced NWBD, two attenuation and uniformity performance classes are considered:
- class A (premium class) which meets more restrictive requirements (i.e. for extended reach PON application) and
- class B (standard class) for standard application (i.e. normal reach PON application). The requirements also cover unbalanced bidirectional non-connectorized single-mode non-wavelength-selective branching devices, however the specifications of unbalanced branching devices are limited to 1x2 and 2x2 devices because they are the most commonly used. This second edition of IEC 61753-031-6 cancels and replaces the first edition published in 2008 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- deletion of the Introduction;
- an updated and extended scope to reflect an introduction of two attenuation and uniformity performance classes for balanced NWBD instead of branching device technologies on the market;
- an updated list of normative references;
- a more simplified introduction to the two types of spectral bands;
- Clause 5, Performance requirements, has been updated and extended to reflect the introduction of two attenuation and uniformity performance classes for balanced NWBD;
- simplified test items to exclude tests for damp heat (steady state) and impact for performance requirements;
- Annex A has been changed to introduce the calculated and minimum requirements for attenuation and uniformity. Keywords: non-wavelength selective branching device (NWBD), IEC category O environment

Dispositifs d'interconnexion et composants passifs fibroniques - Norme de performance - Partie 031-6: Dispositifs de couplage indépendants de la longueur d’onde 1 x N et 2 x N en unimodal non connectorisés pour la catégorie O - Environnement non contrôlé

IEC 61753-031-6:2014 contient les exigences et les sévérités initiales minimales d’essais et de mesures auxquelles il convient qu’un dispositif de couplage indépendant de la longueur d’onde (NWBD, non-wavelength selective branching device) satisfasse afin d’être classé comme satisfaisant aux exigences de la présente norme. Ces exigences couvrent les dispositifs de couplage indépendants de la longueur d’onde 1xN et 2xN en unimodal, non connectorisés, bidirectionnels symétriques destinés à être utilisés dans un environnement de catégorie O selon l’IEC (N correspond au nombre de ports de couplage), qui sont utilisés, en particulier, mais pas de manière exclusive, pour les applications PON. Dans le cas des NWBD symétriques, deux classes d’affaiblissement et d’uniformité sont prises en compte: la classe A (classe de première qualité) qui satisfait aux exigences les plus restrictives (à savoir pour les applications PON étendues) et la classe B (classe normale) pour les applications normales (à savoir les applications PON d’étendue normale). Ces exigences couvrent aussi les dispositifs de couplage indépendants de la longueur d’onde en unimodal, non connectorisés, bidirectionnels asymétriques, toutefois les spécifications des dispositifs de couplage asymétriques sont limitées aux dispositifs 1x2 et 2x2, car ce sont les plus couramment utilisés. Cette deuxième édition de l’IEC 61753-031-6 annule et remplace la première édition parue en 2008 et constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
- la suppression de l’Introduction;
- un domaine d’application mis à jour et étendu pour refléter l’introduction de deux classes de performance d’affaiblissement et d’uniformité pour les NWBD symétriques à la place des technologies de dispositifs de couplage du marché;
- une liste mise à jour des références normatives;
- une introduction plus simple des deux types de bandes spectrales;
- l’Article 5, Exigences de performances, a été mis à jour et étendu pour refléter l’introduction de deux classes de performance d’affaiblissement et d’uniformité pour les NWBD symétriques;
- des éléments soumis à essai simplifiés pour exclure les essais de chaleur humide (essai continu) et d’impact pour les exigences de performance;
- l’Annexe A a été modifiée pour introduire les exigences calculées et minimales en matière d’affaiblissement et d’uniformité.
Mots clés: couplage indépendant de la longueur d’onde (NWBD), environnement de catégorie O selon l’IEC

General Information

• Status: Published
• Publication Date: 02-Sep-2014
• ICS: 33.180.10 - Fibres and cables
• Technical Committee: SC 86B - Fibre optic interconnecting devices and passive components
• Drafting Committee: WG 7 - TC 86/SC 86B/WG 7
• Current Stage: PPUB - Publication issued
• Start Date: 03-Sep-2014
• Completion Date: 30-Sep-2014

Relations

• Revises: IEC 61753-031-6:2008 - Fibre optic interconnecting devices and passive components performance standard - Part 031-6: Non-connectorized single-mode 1xN and 2xN non-wavelength-selective branching devices (NWBD) for Category O - Uncontrolled environment
• Effective Date: 05-Sep-2023

Overview

IEC 61753-031-6:2014 is the IEC performance standard for non-connectorized single‑mode non‑wavelength‑selective branching devices (NWBDs) intended for an IEC category O (uncontrolled) environment. Edition 2.0 (2014) defines the minimum initial tests, measurement requirements and severities that 1×N and 2×N balanced bidirectional NWBDs - and common unbalanced 1×2 and 2×2 variants - must satisfy to be categorized as compliant. The standard is especially relevant to Passive Optical Network (PON) applications and introduces two attenuation/uniformity performance classes (Class A = premium/extended reach, Class B = standard/normal reach).

Key topics and technical requirements

• Scope and device types: Balanced bidirectional non‑connectorized single‑mode 1×N and 2×N NWBDs; unbalanced devices limited to 1×2 and 2×2.
• Performance classes: Two classes for balanced devices - Class A (premium) and Class B (standard) - with stricter attenuation and uniformity in Class A for extended reach PON.
• Minimum tests and severities: Initial tests and measurement methods are drawn from the IEC 61300 series (basic test & measurement procedures). The standard specifies sample preparation (single‑mode fibres per IEC 60793‑2‑50) and test sequencing/grouping.
• Spectral bands: Test validation over spectral bands I (1 260–1 360 nm & 1 480–1 625 nm) and II (1 260–1 360 nm & 1 480–1 660 nm).
• Performance metrics: Focus on attenuation, uniformity and other optical characteristics (directivity, return loss, transient loss) with calculated and minimum requirements provided in Annex A.
• Technical revisions in the 2014 edition: introduction of performance classes, updated normative references, simplified spectral band descriptions, revised Clause 5 (performance requirements), removal of some environmental tests (damp heat steady state and impact) for performance requirements, and new Annex A calculations.

Practical applications and users

• For manufacturers: Design, test and classify non‑connectorized NWBD products to meet market and regulatory expectations for PON splitters and branching devices.
• For test laboratories and certificaton bodies: Implement the IEC 61300‑based test methods and produce compliant test reports required by IEC 61753‑031‑6.
• For network planners and operators: Specify appropriate Class A or B branching devices for extended‑reach or standard PON deployments in uncontrolled environments (outside plant, pole‑top cabinets, etc.).
• For component integrators: Ensure compatibility of non‑connectorized branching devices with single‑mode fibre categories and spectral band requirements.

Related standards

• IEC 61300 series (basic test and measurement procedures)
• IEC 60793‑2‑50 (single‑mode fibre product specifications)
• Other parts of IEC 61753 (performance standards for fibre optic interconnecting devices)

Keywords: non‑wavelength selective branching device (NWBD), IEC category O environment, PON, 1×N, 2×N, single‑mode, attenuation, uniformity, IEC 61300.

Standards Content (Sample)

IEC 61753-031-6 ®
Edition 2.0 2014-09
INTERNATIONAL
STANDARD
Fibre optic interconnecting devices and passive components – Performance
standard –
Part 031-6: Non-connectorized single-mode 1xN and 2xN non-wavelength-
selective branching devices for Category O – Uncontrolled environment
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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IEC 61753-031-6 ®
Edition 2.0 2014-09
INTERNATIONAL
STANDARD
Fibre optic interconnecting devices and passive components – Performance

standard –
Part 031-6: Non-connectorized single-mode 1xN and 2xN non-wavelength-

selective branching devices for Category O – Uncontrolled environment

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
R
ICS 33.180.10 ISBN 978-2-8322-1841-9

– 2 – IEC 61753-031-6:2014 © IEC 2014
CONTENTS
FOREWORD . 3
NOTICE . 5
1 Scope . 6
2 Normative references . 6
3 Test . 7
4 Test report . 8
5 Performance requirements . 8
5.1 Dimensions . 8
5.2 Sample size, sequencing and grouping . 8
5.3 Test details and requirements . 8
Annex A (normative) A and U requirements of 1 × N and 2 × N NWBDs . 16
A.1 Attenuation and uniformity requirements of 1×N and 2×N NWBDs calculated
by the equations of Tests No.1 and 2 . 16
A.2 Minimum requirements at room temperature of attenuation values for
balanced bidirectional 1 × N and 2 × N NWBD . 17
Annex B (normative) Sequencing and grouping of tests . 19
Bibliography . 20

Table 1 – Test details and requirements (1 of 6) . 9
Table A.1 – Attenuation and uniformity requirements of balanced bidirectional NWBD
having the most common port configurations for Class A, with the underlying formulas
as specified in the Tests 1 and 2 of Table 1 . 16
Table A.2 – Attenuation and uniformity requirements of balanced bidirectional NWBD
having the most common port configurations for Class B, with the underlying formulas
as specified in the Test 1s and 2 of Table 1 . 17
Table A.3 – Attenuation requirements of 1×2 and 2×2 unbalanced NWBD having the
most common port configurations, with the underlying formula as specified in the Test
1 of Table 1 . 17
Table A.4 – Minimum requirements at room temperature of attenuation values for
Class A balanced bidirectional NWBD . 18
Table A.5 – Minimum requirements at room temperature of attenuation values for
Class A balanced bidirectional NWBD . 18
Table B.1 – Sample size for each test . 19

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
PERFORMANCE STANDARD –
Part 031-6: Non-connectorized single-mode 1×N and 2×N
non-wavelength-selective branching devices for Category O –
Uncontrolled environment
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
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2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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6) All users should ensure that they have the latest edition of this publication.
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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 61753-031-6 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
This second edition of IEC 61753-031-6 cancels and replaces the first edition published in
2008 and constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) deletion of the Introduction;

– 4 – IEC 61753-031-6:2014 © IEC 2014
b) an updated and extended scope to reflect an introduction of two attenuation and uniformity
performance classes for balanced NWBD instead of branching device technologies on the
market;
c) an updated list of normative references;
d) a more simplified introduction to the two types of spectral bands;
e) Clause 5, Performance requirements, has been updated and extended to reflect the
introduction of two attenuation and uniformity performance classes for balanced NWBD;
f) simplified test items to exclude tests for damp heat (steady state) and impact for
performance requirements;
g) Annex A has been changed to introduce the calculated and minimum requirements for
attenuation and uniformity.
The text of this standard is based on the following documents:
FDIS Report on voting
86B/3763/FDIS 86B/3825/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
IEC 61753 consists of the following parts, under the general title Fibre optic interconnecting
devices and passive components – Performance standard:
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

NOTICE
This document contains material that is Copyright © 2006, Telcordia Technologies, Inc.
("Telcordia"). All rights reserved. The reader is advised that this IEC document and Telcordia
source(s) may differ, and the context and use of said material in this IEC document may differ
from that of Telcordia.
TELCORDIA MAKES NO REPRESENTATION OR WARRANTY, EXPRESS OR IMPLIED,
WITH RESPECT TO THE SUFFICIENCY, ACCURACY, OR UTILITY OF ANY INFORMATION
OR OPINION CONTAINED HEREIN. ANY USE OF OR RELIANCE UPON SAID
INFORMATION OR OPINION IS AT THE RISK OF THE USER. TELCORDIA SHALL NOT BE
LIABLE FOR ANY DAMAGE OR INJURY INCURRED BY ANY PERSON ARISING OUT OF
THE SUFFICIENCY, ACCURACY, OR UTILITY OF ANY INFORMATION OR OPINION
CONTAINED HEREIN.
– 6 – IEC 61753-031-6:2014 © IEC 2014
FIBRE OPTIC INTERCONNECTING DEVICES
AND PASSIVE COMPONENTS –
PERFORMANCE STANDARD –
Part 031-6: Non-connectorized single-mode 1×N and 2×N
non-wavelength-selective branching devices for Category O –
Uncontrolled environment
1 Scope
This part of IEC 61753 contains the minimum initial tests and measurement requirements and
severities which a non-wavelength selective branching device (NWBD) should satisfy in order
to be categorized as meeting the requirements of this standard.
The requirements cover balanced bidirectional non-connectorized single-mode 1×N and 2×N
non-wavelength-selective branching devices for use in an IEC category O environment (N is
the number of branching ports), especially but not exclusively used for PON application. For
balanced NWBD, two attenuation and uniformity performance classes are considered: class A
(premium class) which meets more restrictive requirements (i.e. for extended reach PON
application) and class B (standard class) for standard application (i.e. normal reach PON
application).
The requirements also cover unbalanced bidirectional non-connectorized single-mode non-
wavelength-selective branching devices, however the specifications of unbalanced branching
devices are limited to 1 × 2 and 2 × 2 devices because they are the most commonly used.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60793-2-50:2012, Optical fibres – Part 2-50: Product specifications – Sectional
specification for class B single-mode fibres
IEC 61300-2-1, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-1: Tests – Vibration (sinusoidal)
IEC 61300-2-4, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-4: Tests – Fibre/cable retention
IEC 61300-2-5, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-5: Tests – Torsion
IEC 61300-2-9, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-9: Tests – Shock
IEC 61300-2-14, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-14: Tests – High optical power

IEC 61300-2-19, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-19: Tests – Damp heat (steady state)
IEC 61300-2-22, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-22: Tests – Change of temperature
IEC 61300-2-42, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-42: Tests – Static side load for connectors
IEC 61300-2-44, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-44: Tests – Flexing of the strain relief of fibre optic
devices
IEC 61300-2-48:2009, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 2-48: Tests – Temperature-humidity cycling
IEC 61300-3-2:2009, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 3-2: Examination and measurements – Polarization
dependent loss in a single-mode fibre optic device
IEC 61300-3-3:2009, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 3-3: Examinations and measurements – Active
monitoring of changes in attenuation and return loss
IEC 61300-3-6:2008, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 3-6: Examinations and measurements – Return loss
IEC 61300-3-7:2009, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 3-7: Examinations and measurements – Wavelength
dependence of attenuation and return loss of single mode components
IEC 61300-3-20, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 3-20: Examinations and measurements – Directivity of
fibre optic branching devices
IEC 61300-3-28, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 3-28: Examinations and measurements – Transient loss
3 Test
All test methods are selected within the IEC 61300 series.
The samples for tests shall be terminated onto single-mode fibres according to category B1.1,
B1.3, or B.6 of IEC 60793-2-50:2012 in either coated fibres (primary and secondary) or
reinforced cable format.
All tests shall be carried out to validate performance over one of the spectral bands listed
below:
1) Spectral bands I:
1 260 nm to 1 360 nm
1 480 nm to 1 625 nm
2) Spectral bands II:
1 260 nm to 1 360 nm
1 480 nm to 1 660 nm
– 8 – IEC 61753-031-6:2014 © IEC 2014
4 Test report
Fully documented test reports and supporting evidence shall be prepared and be available for
inspection as evidence that the tests have been carried out and complied with.
5 Performance requirements
5.1 Dimensions
Dimensions shall comply with with those given in appropriate manufacturer’s drawings.
5.2 Sample size, sequencing and grouping
Sample sizes for the tests are defined in Annex B. Test groups and sequences shall be in
sequential order as shown in Annex B.
5.3 Test details and requirements
Performance requirements and details are specified in Table 1.
All optical perfor
...

IEC 61753-031-6 ®
Edition 2.0 2014-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components –
Performance standard –
Part 031-6: Non-connectorized single-mode 1×N and 2×N non-wavelength
selective branching devices for Category O – Uncontrolled environment

Dispositifs d’interconnexion et composants passifs fibroniques –
Norme de performance –
Partie 031-6: Dispositifs de couplage indépendants de la longueur d’onde
1×N et 2×N en unimodal, non connectorisés, pour catégorie O –
Environnement non contrôlé
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IEC 61753-031-6 ®
Edition 2.0 2014-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components –

Performance standard –
Part 031-6: Non-connectorized single-mode 1×N and 2×N non-wavelength

selective branching devices for Category O – Uncontrolled environment

Dispositifs d’interconnexion et composants passifs fibroniques –

Norme de performance –
Partie 031-6: Dispositifs de couplage indépendants de la longueur d’onde

1×N et 2×N en unimodal, non connectorisés, pour catégorie O –

Environnement non contrôlé
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10 ISBN 978-2-8322-7274-9

– 2 – IEC 61753-031-6:2014 © IEC 2014
CONTENTS
FOREWORD . 3
NOTICE . 5
1 Scope . 6
2 Normative references . 6
3 Test . 7
4 Test report . 8
5 Performance requirements . 8
5.1 Dimensions . 8
5.2 Sample size, sequencing and grouping . 8
5.3 Test details and requirements . 8
Annex A (normative) A and U requirements of 1 × N and 2 × N NWBDs . 16
A.1 Attenuation and uniformity requirements of 1×N and 2×N NWBDs calculated
by the equations of Tests No.1 and 2 . 16
A.2 Minimum requirements at room temperature of attenuation values for
balanced bidirectional 1 × N and 2 × N NWBD . 17
Annex B (normative) Sequencing and grouping of tests . 19
Bibliography . 20

Table 1 – Test details and requirements (1 of 6) . 9
Table A.1 – Attenuation and uniformity requirements of balanced bidirectional NWBD
having the most common port configurations for Class A, with the underlying formulas
as specified in the Tests 1 and 2 of Table 1 . 16
Table A.2 – Attenuation and uniformity requirements of balanced bidirectional NWBD
having the most common port configurations for Class B, with the underlying formulas
as specified in the Test 1s and 2 of Table 1 . 17
Table A.3 – Attenuation requirements of 1×2 and 2×2 unbalanced NWBD having the
most common port configurations, with the underlying formula as specified in the Test
1 of Table 1 . 17
Table A.4 – Minimum requirements at room temperature of attenuation values for
Class A balanced bidirectional NWBD . 18
Table A.5 – Minimum requirements at room temperature of attenuation values for
Class A balanced bidirectional NWBD . 18
Table B.1 – Sample size for each test . 19

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
PERFORMANCE STANDARD –
Part 031-6: Non-connectorized single-mode 1×N and 2×N
non-wavelength-selective branching devices for Category O –
Uncontrolled environment
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,
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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-
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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
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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 61753-031-6 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
This bilingual version (2019-08) corresponds to the monolingual English version, published in
2014-09.
This second edition of IEC 61753-031-6 cancels and replaces the first edition published in
2008 and constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
– 4 – IEC 61753-031-6:2014 © IEC 2014
a) deletion of the Introduction;
b) an updated and extended scope to reflect an introduction of two attenuation and uniformity
performance classes for balanced NWBD instead of branching device technologies on the
market;
c) an updated list of normative references;
d) a more simplified introduction to the two types of spectral bands;
e) Clause 5, Performance requirements, has been updated and extended to reflect the
introduction of two attenuation and uniformity performance classes for balanced NWBD;
f) simplified test items to exclude tests for damp heat (steady state) and impact for
performance requirements;
g) Annex A has been changed to introduce the calculated and minimum requirements for
attenuation and uniformity.
The text of this standard is based on the following documents:
FDIS Report on voting
86B/3763/FDIS 86B/3825/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
The French version of this standard has not been voted upon.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
IEC 61753 consists of the following parts, under the general title Fibre optic interconnecting
devices and passive components – Performance standard:
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
NOTICE
This document contains material that is Copyright © 2006, Telcordia Technologies, Inc.
("Telcordia"). All rights reserved. The reader is advised that this IEC document and Telcordia
source(s) may differ, and the context and use of said material in this IEC document may differ
from that of Telcordia.
TELCORDIA MAKES NO REPRESENTATION OR WARRANTY, EXPRESS OR IMPLIED,
WITH RESPECT TO THE SUFFICIENCY, ACCURACY, OR UTILITY OF ANY INFORMATION
OR OPINION CONTAINED HEREIN. ANY USE OF OR RELIANCE UPON SAID
INFORMATION OR OPINION IS AT THE RISK OF THE USER. TELCORDIA SHALL NOT BE
LIABLE FOR ANY DAMAGE OR INJURY INCURRED BY ANY PERSON ARISING OUT OF
THE SUFFICIENCY, ACCURACY, OR UTILITY OF ANY INFORMATION OR OPINION
CONTAINED HEREIN.
– 6 – IEC 61753-031-6:2014 © IEC 2014
FIBRE OPTIC INTERCONNECTING DEVICES
AND PASSIVE COMPONENTS –
PERFORMANCE STANDARD –
Part 031-6: Non-connectorized single-mode 1×N and 2×N
non-wavelength-selective branching devices for Category O –
Uncontrolled environment
1 Scope
This part of IEC 61753 contains the minimum initial tests and measurement requirements and
severities which a non-wavelength selective branching device (NWBD) should satisfy in order
to be categorized as meeting the requirements of this standard.
The requirements cover balanced bidirectional non-connectorized single-mode 1×N and 2×N
non-wavelength-selective branching devices for use in an IEC category O environment (N is
the number of branching ports), especially but not exclusively used for PON application. For
balanced NWBD, two attenuation and uniformity performance classes are considered: class A
(premium class) which meets more restrictive requirements (i.e. for extended reach PON
application) and class B (standard class) for standard application (i.e. normal reach PON
application).
The requirements also cover unbalanced bidirectional non-connectorized single-mode non-
wavelength-selective branching devices, however the specifications of unbalanced branching
devices are limited to 1 × 2 and 2 × 2 devices because they are the most commonly used.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60793-2-50:2012, Optical fibres – Part 2-50: Product specifications – Sectional
specification for class B single-mode fibres
IEC 61300-2-1, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-1: Tests – Vibration (sinusoidal)
IEC 61300-2-4, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-4: Tests – Fibre/cable retention
IEC 61300-2-5, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-5: Tests – Torsion
IEC 61300-2-9, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-9: Tests – Shock
IEC 61300-2-14, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-14: Tests – High optical power

IEC 61300-2-19, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-19: Tests – Damp heat (steady state)
IEC 61300-2-22, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-22: Tests – Change of temperature
IEC 61300-2-42, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-42: Tests – Static side load for connectors
IEC 61300-2-44, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-44: Tests – Flexing of the strain relief of fibre optic
devices
IEC 61300-2-48:2009, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 2-48: Tests – Temperature-humidity cycling
IEC 61300-3-2:2009, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 3-2: Examination and measurements – Polarization
dependent loss in a single-mode fibre optic device
IEC 61300-3-3:2009, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 3-3: Examinations and measurements – Active
monitoring of changes in attenuation and return loss
IEC 61300-3-6:2008, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 3-6: Examinations and measurements – Return loss
IEC 61300-3-7:2009, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 3-7: Examinations and measurements – Wavelength
dependence of attenuation and return loss of single mode components
IEC 61300-3-20, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 3-20: Examinations and measurements – Directivity of
fibre optic branching devices
IEC 61300-3-28, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 3-28: Examinations and measurements – Transient loss
3 Test
All test methods are selected within the IEC 61300 series.
The samples for tests shall be terminated onto single-mode fibres according to category B1.1,
B1.3, or B.6 of IEC 60793-2-50:2012 in either coated fibres (primary and secondary) or
reinforced cable format.
All tests shall be carried out to validate performance over one of the spectral bands listed
below:
1) Spectral bands I:
1 260 nm to 1 360 nm
1 480 nm to 1 625 nm
2) Spectral bands II:
1 260 nm to 1 360 nm
60 nm
1 480 nm to 1 6
– 8 – IEC 61753-031-6:2014 © IEC 2014
4 Test report
Fully documented test reports and supporting evidence shall be prepared and be available for
inspection as evidence that the tests have been carried out and complied with.
5 Performance requirements
5.1 Dimensions
Dimensions shall comply with with those given in appropriate manufacturer’s drawings.
5.2 Sample size, sequencing and grouping
Sample sizes for the tests are defined in Annex B. Test groups and sequences shall be in
sequential order as shown in Annex B.
5.3 Test details and requirements
Performance requirements and details are specified in Table 1.
All optical performances are given only for non-connectorized NWBD. During the
environmental tests where monitoring of the NWBD is needed, all ports of the device shall be
monitored.
In Annex A some numerical values of attenuation and uniformity requirements of tests No.1
and 2 for the most commonly used NWBD are shown in Tables A.1, A.2 and A.3.
In Tables A.4 and A.5 the minimum attenuation requirements at room temperature are
described by way of equations on the top of column, with the calculated values of the most
commonly used NWBD listed below.

Table 1 – Test details and requirements (1 of 7)
No. Tests Requirements Details
Launch
≥ 2 m
1 Attenuation (A) Balanced NWBD
patchcord
(Insertion loss) Configuration 1xN 2xN length.

IEC 61300-3-
Performance class A B A B
Source type
Unpolarized.
7:2009
Spectral band I
≤ 0,5 + 3,3log N (dB) ≤ 0,5 + 3,4log N (dB) ≤ 0,7 + 3,4log N (dB) ≤ 0,7 + 3,5log N (dB)
2 2 2 2
(Method A) Launch
The wavelength of
conditions the source shall be
Spectral band II ≤ 0,5 + 3,4log N (dB) ≤ 0,5 + 3,5log N (dB) ≤ 0,7 + 3,5log N (dB) ≤ 0,7 + 3,6log N (dB)]
2 2 2 2
longer than the cut-
Unbalanced
off wavelength of
NWBD
the fibre.
Uncertainty
≤ ± 0,05 dB
The measurement
Spectral band I
should be performed
≤ 22 – 10,5log P (dB)] where P is the nominal percentage of power associated with one port
with all combination
Spectral band II
of input/output ports.
See Tables A.1, A.2
and A.3 for example
Launch
≥ 2 m
2 Uniformity (U) Balanced NWBD
patchcord
IEC 61300-3-
Configuration 1 x N 2 x N length
7:2009
Performance A B A B
Source type
Unpolarized.
(Method A)
Class
Launch
The wavelength of
Spectral band I ≤ 0,1 + 0,3log N (dB) ≤ 0,2 + 0,3log N (dB) ≤ 0,4 + 0,4log N (dB) ≤ 0,5 + 0,4log N (dB)
2 2 2 2
conditions the source shall be
longer than the cut-
Spectral band II
≤ 0,1 + 0,4log N (dB) ≤ 0,2 + 0,4log N (dB) ≤ 0,4 + 0,5log N (dB) ≤ 0,5 + 0,5log N (dB)
2 2 2 2
off wavelength of
the fibre.
Uncertainty
≤ ± 0,05 dB
The measurement
should be performed
with all combination
of input/output ports.
See Tables A.1 and
A.2 for example
– 10 – IEC 61753-031-6:2014 © IEC 2014
Table 1 (2 of 7)
No. Tests Requirements Details
Launch
≥ 2 m
3 Directivity
≥ 55 dB
patchcord
length
IEC 61300-3-20
Source type LD
Launch The wavelength of
conditions the source shall be
longer than the cut-
off wavelength of the
fibre
Uncertainty
≤ ± 1 dB
The measurement
should be made
between all pairs of
Input/output ports.
All ports not under
test shall be
terminated to avoid
unwanted reflections
contributing to the
measurement
Launch ≥ 2 m
4 Return loss (RL) ≥ 55 dB
patchcord
IEC 61300-3-6:2008 length
(Method 1, OCWR)
Source type LD
Launch The wavelength of
conditions the source shall be
longer than the cut-
off wavelength of the
fibre
Uncertainty
≤ ± 1 dB
The measurement
should be performed
with all combination
of input/output ports.
All ports not under
test shall be
terminated to avoid
unwanted reflections
contributing to the
measurement
Launch ≥ 2 m
5 Polarization For balanced NWBD:
patchcord
dependent loss
length
1 × N        2 × N
(PDL)
N ≤ 4    ≤ 0,2 dB      ≤ 0,3 dB
IEC 61300-3-2:2009
Source type LD
4 Uncertainty ≤ ± 0,05 dB
N >16   ≤ 0,4 dB      ≤ 0,5 dB
The measurement
For unbalanced 1×2 and 2×2 NWBD and for
should be performed
any pair of input and output ports:
with all combination
of input/output ports
≤ 0,7 – 0,25log P (dB)
Where P is the nominal percentage of the
power associated with one port

Table 1 (3 of 7)
No. Tests Requirements Details
Launch patchcord
≥ 2 m
6 High optical power
P = 500 mW (+27 dBm) per port only
max
length
one at the time.
IEC 61300-2-14 During the test the change in A shall be
Source type Unpolarized.
within ± 0,5 dB of the original value

under ambient conditions, while on
Launch
The wavelength of
completion of the test the change in A
conditions
the source shall be
shall be within ± 0,3 dB of the original
longer than the cut-
value.
off wavelength of the
fibre.
During and on completion of the test the

RL limit of Test No. 4 shall be met
Uncertainty
≤ ± 0,05 dB
A test
Uncertainty
≤ ± 1 dB
RL test
Test wavelength
1 310 nm ± 20 nm
Spectral band I
1 550 nm ± 20 nm
Test wavelength
1 310 nm ± 20 nm
Spectral band II
1 625 nm ± 20 nm
Duration of the
30 min
optical power
exposure at the
The measurement
each level
shall be performed
between the
common port (input
port) and the output
ports
Temperature + 75 °C ± 2 °C
7 Damp heat (steady For balanced and unbalanced NWBD

state) before and on completion of the test the
Relative humidity
90 % + 5 %
A limits of Test No. 1 shall be met.

IEC 61300-2-19
In addition during the test the change in
Duration of 168 h
A of balanced NWBD shall be within ±
exposure
0,3 dB for N ≤ 4 and within ± 0,5 dB for
Specimens shall be
N > 4 of the original value under ambient
optically functioning.
conditions. For unbalanced NWBD the
A and RL shall be
change in A during the test shall be
measured before the
within ± 0,3 dB for P % > 2 % and
test, during the test
±0,5 dB for P % ≤ 2 % of the original at a maximum
value. interval of 10 min
and after the test by
During and after the test the RL limit of
the Method 3 of
Test No. 4 shall be met
IEC 61300-3-3:2009
– 12 – IEC 61753-031-6:2014 © IEC 2014
Table 1 (4 of 7)
No. Tests Requirements Details
Frequency 10 Hz to 55 Hz
8 Vibration For balanced and unbalanced NWBD
range
(sinusoidal) before and on completion of the test the A

limits of Test No. 1 shall be met
Number of 3 orthogonal
IEC 61300-2-1
In addition during the test the change in A axes
of balanced NWBD shall be within ± 0,3 dB 2 h
Duration per
for N ≤ 4 and within ± 0,5 dB for N > 4 of
axis
the initial value. For unbalanced NWBD the
1 octave/min
change in A during the test shall be within
Rate of change
± 0,3 dB for P % > 2 % and within ±0,5 dB
1,52 mm
for P % ≤ 2 % of the initial value
Vibration
During and after the test the RL limit of
amplitude NWBD shall be
Test No. 4 shall be met
optically functioning.
A and RL shall be
measured before and
after the test by
means the set-ups
defined in Test No. 1
and No. 4.
In addition during the
test the change in A
shall be measured by
IEC 61300-3-28
(transient loss) at
1 550 nm ± 25 nm
Acceleration Components:
9 Shock For balanced and unbalanced NWBD
forces 5 000 m/s for mass
before and on completion of the test the A
IEC 61300-2-9
≤ 0,125 kg
limits of Test No. 1 shall be met

In addition on completion of the test the
Modules: 2 000 m/s
change in A of balanced NWBD shall be

for: 0,125 kg < mass
within ± 0,3 dB for N ≤ 4 and within ±
≤ 0,225 kg
0,5 dB for N > 4 of the initial value. For

unbalanced NWBD the change in A after
500 m/s for: 0,225
the test shall be within ± 0,3 dB for P % >
kg < mass ≤ 1 kg
2 % and within ± 0,5 dB for P % ≤ 2 % of
Nominal
the initial value 1 ms, half sine pulse
duration
After the test the RL limit of Test No. 4

shall be met
No. of shocks
3 axes in 2 directions,
2 shocks per axis,
12 shocks total.
NWBD shall be
optically functioning.
A and RL shall be
measured before and
after the test by
means the set-ups
defined in Tests No. 1
and No. 4
Table 1 (5 of 7)
No. Tests Requirements Details
High
+ 75 °C ± 2 °C
10 Change of For balanced and unbalanced NWBD
temperature
temperature before and on completion of the test the A

limits of Test No. 1 shall be met.
IEC 61300-2-22 Low
– 40 °C ± 2 °C
In addition during the test the change in A temperature

of balanced NWBD shall be within ± 0,3 dB
1 h
Duration at
for N ≤ 4 and within ± 0,5 dB for N > 4 of

extreme
the original value under ambient conditions.

temperature
For unbalanced NWBD the change in A

during the test shall be within ± 0,3 dB for
≥ 1 °C/min
Temperature
P % > 2 % and ±0,5 dB for P % ≤ 2 % of

rate of change
the original value.
During and after the test the RL limit of
Number of
Test No. 4 shall be met
cycles
Dwell at +23 °C
allowed between
temperature
extremes.
Specimens shall be
optically functioning.
A and RL shall be
measured before the
test, during the test at
a maximum interval of
10 min and after the
test by the Method 3
of IEC 61300-3-
3:2009
High
+ 85 °C ± 2 °C
11 Temperature For balanced and unbalanced NWBD
temperature:
humidity cycling before and on completion of the test the A

limits of Test No. 1 shall be met
IEC 61300-2-
Low
– 40 °C ± 2 °C
48:2009
In addition during the test the change in A temperature

(Method A) of balanced NWBD shall be within ± 0,3 dB

Relative
for N ≤ 4 and within ± 0,5 dB for N > 4 of
85 % ± 5 %
humidity at the
the original value under ambient conditions.
maximum
For unbalanced NWBD the change in A

temperature
during the test shall be within ± 0,3 dB for

P % > 2 % and ±0,5 dB for P % ≤ 2 % of
Duration at
1 h.
the original value
extreme
During and after the test the RL limit of
temperatures
Test No. 4 shall be met
Temperature
≥ 1 °C/min
rate of change:
Number of
cycles:
Specimens shall be
optically functioning.
A and RL shall be
measured before the
test, during the test at
a maximum interval of
10 min and after the
test by the Method 3
of IEC 61300-3-
3:2009
– 14 – IEC 61753-031-6:2014 © IEC 2014
Table 1 (6 of 7)
No. Tests Requirements Details
Magnitude of the load
12 Flexing of strain For balanced and unbalanced NWBD before

relief of fibre optic and on completion of the test the A limits of

devices Test No. 1 shall be met.

IEC 61300-2-44 In addition on completion of the test the
change in A of balanced NWBD shall be

within ± 0,3 dB for N ≤ 4 and within ± 0,5 dB
for N > 4 of the initial value. For unbalanced
Number of cycles
NWBD the change in A after the test shall

be within ± 0,3 dB for P % > 2 % and within

± 0,5 dB for P % ≤ 2 % of the initial value.
After the test the RL limit of Test No. 4 shall
be met
Magnification 5 N at a speed of 0,1
13 Torsion/twist For balanced and unbalanced NWBD before
and rate of N/s for reinforced
and on completion of the test the A limits of
IEC 61300-2-5 application of cables
Test No. 1 shall be met.
the tensile
In addition on completion of the test the
load 2 N at a speed of 0,1
change in A of balanced NWBD shall be N/s for secondary and
within ± 0,3 dB for N ≤ 4 and within ± 0,5 dB primary coated fibres.

for N > 4 of the initial value. For unbalanced
For primary coated
NWBD the change in A after the test shall
fibre the test can be
be within ± 0,3 dB for P % > 2 % and within
omitted
± 0,5 dB for P % ≤ 2 % of the initial value.

After the test the RL limit of Test No. 4 shall
Point of 0,2 m from the end of
be met
application of the device
the load
Number of 10 cycles at ± 180°
cycles
NWBD shall be
optically functioning.
A and RL shall be
measured before and
after the test by
means the set-ups
defined in Tests No. 1
and No. 4
Magnitude of 5 N for 5 s for
14 Static side load For balanced and unbalanced NWBD before
the load reinforced cable;
and on completion of the test the A limits of
IEC 61300-2-42 2,3 N for 5 s for
Test No. 1 shall be met.
primary and
In addition on completion of the test the secondary coated
change in A of balanced NWBD shall be fibre.
Point of
within ± 0,3 dB for N ≤ 4 and within ± 0,5 dB
application of 0,3 m from the end of
for N > 4 of the initial value. For unbalanced
tensile load the device.
NWBD the change in A after the test shall

be within ± 0,3 dB for P % > 2 % and within
The test shall be
± 0,5 dB for P % ≤ 2 % of the initial value.
done on two mutually
After the test the RL limit of Test No. 4 shall
perpendicular
be met
directions as
permitted by the
product design.
NWBD shall be
optically functioning.
A and RL shall be
measured before and
after the test by
means the set-ups
defined in Tests No. 1
and No. 4
Table 1 (7 of 7)
No. Tests Requirements Details
Magnitude and
10 N ± 1 N at a speed
15 Fibre/cable retention For balanced and unbalanced NWBD before
rate of
of 0,5 N/s for
and on completion of the test the A limits of
IEC 61300-2-4
application of reinforced cable.
Test No. 1 shall be met
the tensile
In addition on completion of the test the load
5 N ± 0,5 N at a
change in A of balanced NWBD shall be
speed of 0,5 N/s for
within ± 0,3 dB for N ≤ 4 and within ± 0,5 dB
primary and
for N > 4 of the initial value. For unbalanced
secondary coated
NWBD the change in A after the test shall fibres.

be within ± 0,3 dB for P % > 2 % and within
Point of
0,3 m from the from
± 0,5 dB for P % ≤ 2 % of the initial value
application of
the exit point of the
After the test the RL limit of Test No. 4 shall
tensile load
fibre/cable from the
be met
NWBD.
Duration of the
120 s at 10 N;
test
60 s at 5 N
(maintaining
the load)
NWBD shall be
optically functioning.
A and RL shall be
measured before and
after the test by
means the set-ups
defined in Tests No.
1 and No. 4
– 16 – IEC 61753-031-6:2014 © IEC 2014
Annex A
(normative)
A and U requirements of 1 × N and 2 × N NWBDs
A.1 Attenuation and uniformity requirements of 1×N and 2×N NWBDs
calculated by the equations of Tests No.1 and 2
Tables A.1, A.2 and A.3 show the attenuation and uniformity requirements for different
classes with the underlying formulas as specified in the Tests 1 and 2 of Table 1.
Table A.1 – Attenuation and uniformity requirements of balanced bidirectional NWBD
having the most common port configurations for Class A, with the underlying formulas
as specified in the Tests 1 and 2 of Table 1
N
1 × N 2 × N
Spectral band I Spectral band II Spectral band I Spectral band II
A (dB) U (dB) A (dB) U (dB) A (dB) U (dB) A (dB) U (dB)
max max max max max max max max
0,5+3,3log N 0,1+0,3log N 0,5+3,4log N 0,1+0,4log N 0,7+3,4log N 0,4+0,4log N 0,7+3,5log N 0,4+0,5log N
2 2 2 2 2 2 2 2
2 3,8 0,4 3,9 0,5 4,1 0,8 4,2 0,9
3 5,7 0,6 5,9 0,7 6,1 1,0 6,2 1,2
4 7,1 0,7 7,3 0,9 7,5 1,2 7,7 1,4
6 9,0 0,9 9,3 1,1 9,5 1,4 9,7 1,7
8 10,4 1,0 10,7 1,3 10,9 1,6 11,2 1,9
12 12,3 1,2 12,7 1,5 12,9 1,8 13,2 2,2
16 13,7 1,3 14,1 1,7 14,3 2,0 14,7 2,4
24 15,6 1,5 16,1 1,9 16,3 2,2 16,7 2,7
32 17,0 1,6 17,5 2,1 17,7 2,4 18,2 2,9
64 20,3 1,9 20,9 2,5 21,1 2,8 21,7 3,4
128 23,6 2,2 24,3 2,9 24,5 3,2 25,2 3,9
NOTE N is the number of branching ports.

Table A.2 – Attenuation and uniformity requirements of balanced bidirectional NWBD
having the most common port configurations for Class B, with the underlying formulas
as specified in the Test 1 and 2 of Table 1
N
1 × N 2 × N
Spectral band I Spectral band II Spectral band I Spectral band II
A (dB) U (dB) A (dB) U (dB) A (dB) U (dB) A (dB) U (dB)
max max max max max max max max
0,5+3,4log N 0,2+0,3log N 0,5+3,5log N 0,2+0,4log N 0,7+3,5log N 0,5+0,4log N 0,7+3,6log N 0,5+0,5log N
2 2 2 2 2 2 2 2
2 3,9 0,5 4,0 0,6 4,2 0,9 4,3 1,0
3 5,9 0,7 6,0 0,8 6,2 1,1 6,4 1,3
4 7,3 0,8 7,5 1,0 7,7 1,3 7,9 1,5
6 9,3 1,0 9,5 1,2 9,7 1,5 10,0 1,8
8 10,7 1,1 11,0 1,4 11,2 1,7 11,5 2,0
12 12,7 1,3 13,0 1,6 13,2 1,9 13,6 2,3
16 14,1 1,4 14,5 1,8 14,7 2,1 15,1 2,5
24 16,1 1,6 16,5 2,0 16,7 2,3 17,2 2,8
32 17,5 1,7 18,0 2,2 18,2 2,5 18,7 3,0
64 20,9 2,0 21,5 2,6 21,7 2,9 22,3 3,5
128 24,3 2,3 25,0 3,0 25,2 3,3 25,9 4,0
NOTE N is the number of branching ports.

Table A.3 – Attenuation requirements of 1×2 and 2×2 unbalanced NWBD having the
most common port configurations, with the underlying formula as specified in
Test 1 of Table 1
Coupling ratio A /A
1 2
max max
P %/P % dB
1 2
(22 – 10,5log P )/(22 – 10,5log P )
10 1 10 2
40/60 5,2 / 3,.3
30/70 6,5 / 2,6
20/80 8,3 / 2,0
10/90 11,5 / 1,5
5/95 14,7 / 1,2
2/98 18,8 / 1,1
1/99 22,0 / 1,0
A.2 Minimum requirements at room temperature of attenuation values for
balanced bidirectional 1 × N and 2 × N NWBD
Tables A.4 and A.5 show the minimum requirements at room temperature of attenuation
values for different classes.
– 18 – IEC 61753-031-6:2014 © IEC 2014
Table A.4 – Minimum requirements at room temperature of attenuation values
for Class A balanced bidirectional NWBD
N 1 × N 2 × N
Spectral band I Spectral band II Spectral band I Spectral band II
A (dB) A (dB) A (dB) A (dB)
max max max max
0,5+3,2log N 0.5+3,3log N 0,7+3,3log N 0,7+3,4log N
2 2 2 2
2 3,7 3,8 4,0 4,1
3 5,6 5,7 5,9 6,1
4 6,9 7,1 7,3 7,5
6 8,8 9,0 9,2 9,5
8 10,1 10,4 10,6 10,9
12 12,0 12,3 12,5 12,9
16 13,3 13,7 13,9 14,3
24 15,2 15,6 15,8 16,3
32 16,5 17,0 17,2 17,7
64 19,7 20,3 20,5 21,1
128 22,9 23,6 23,8 24,5
NOTE N is the number of branching ports.

Table A.5 – Minimum requirements at room temperature of attenuation values
for Class A balanced bidirectional NWBD
N
1 × N 2 × N
Spectral band I Spectral band II Spectral band I Spectral band II
A (dB) A (dB) A (dB) A (dB)
max max max max
0,5+3,3log N 0.5+3,4log N 0,7+3,4log N 0,7+3,5log N
2 2 2 2
2 3,8 3,9 4,1 4,2
3 5,7 5,9 6,1 6,2
4 7,1 7,3 7,5 7,7
6 9,0 9,3 9,5 9,7
8 10,4 10,7 10,9 11,2
12 12,3 12,7 12,9 13,2
16 13,7 14,1 14,3 14,7
24 15,6 16,1 16,3 16,7
32 17,0 17,5 17,7 18,2
64 20,3 20,9 21,1 21,7
128 23,6 24,3 24,5 25,2
NOTE N is the number of branching ports.

Annex B
(normative)
Sequencing and grouping of tests
The sample size for each test is shown in Table B.1. Test groups and sequences shall be
performed in sequential order as described in the table. The samples are sourced as defined.
Table B.1 – Sample size for each test
Test Test Sample Test from which samples Group
number size are sourced
1 Attenuation (insertion loss) 12 NEW
2 Uniformity 12 1
3 Directivity 12 2 1
4 Return loss 12 3
5 Polarization dependent loss 12 4
6 High optical power 8 5 2
7 Damp heat (steady state) 4 5
8 Vibration 4 7
9 Shock 4 8
10 Change of temperature 4 9
11 Temperature humidity cycling 4 10 3
12 Flexing of strain relief of fibre optic devices 4 11
13 Torsion/twist 4 12
14 Static side load 4 13
15 Fibre/cable retention 4 14
– 20 – IEC 61753-031-6:2014 © IEC 2014
Bibliography
IEC 60875-1, Fibre optic interconnecting devices and passive optical components – Non-
wavelength-selective fibre optic branching devices – Part 1: Generic specification
IEC 61753-1, Fibre optic interconnecting devices and passive components performance
standard – Part 1: General and guidance for performance standard
Recommendation ITU-T G.671, Transmission characteristics of optical components and
subsystem
____________
– 22 – IEC 61753-031-6:2014 © IEC 2014
SOMMAIRE
SOMMAIRE . 22
AVANT-PROPOS . 23
AVERTISSEMENT . 25
1 Domaine d’application . 26
2 Références normatives . 26
3 Essai . 27
4 Rapport d’essai . 28
5 Exigences de performances . 28
5.1 Dimensions . 28
5.2 Nombre d’échantillons, séquences et groupement . 28
5.3 Exigences et détails d’essai . 28
Annexe A (normative) Exigences A et U des NWBD 1 × N et 2 × N . 36
A.1 Exigences d’affaiblissement et d’uniformité des NWBD 1×N et 2×N calculées
o
par les équations des essais n 1 et 2 . 36
A.2 Exigences minimales à température ambiante des valeurs d’affaiblissement
pour les N
...