Amendment 1 - Information technology - Implementation and operation of customer premises cabling - Part 3: Testing of optical fibre cabling

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ISO/IEC 14763-3:2014/AMD1:2018 - Amendment 1 - Information technology - Implementation and operation of customer premises cabling - Part 3: Testing of optical fibre cabling
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ISO/IEC 14763-3
Edition 2.0 2018-08
Information technology – Implementation and operation of customer premises
cabling –
Part 3: Testing of optical fibre cabling
ISO/IEC 14763-3:2014-06/AMD1:2018-08(en)
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Copyright © 2018 ISO/IEC, Geneva, Switzerland

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ISO/IEC 14763-3
Edition 2.0 2018-08
Information technology – Implementation and operation of customer premises
cabling –
Part 3: Testing of optical fibre cabling
ICS 35.200 ISBN 978-2-8322-5976-4

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

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– 2 – ISO/IEC 14763-3:2014/AMD1:2018
© ISO/IEC 2018

This amendment has been prepared by subcommittee SC 25: Interconnection of information

technology equipment, of ISO/IEC joint technical committee 1: Information technology.

This document has been approved by vote of the member bodies, and the voting results may

be obtained from the address given on the second title page.

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.
INTRODUCTION to the amendment

This document contains information for inspecting end faces of the different kinds of installed

fibre optic cabling interfaces and connectors of test cords and recommendations for cleaning

these interfaces, and replaces the normative Annex B and deletes the informative Annex H of

ISO/IEC 14763-3:2014.

Additional information regarding channel and link testing is provided to Annex E.

Replace paragraphs 1 to 3, including Figure 1, with the following:

This International Standard has been prepared in support of International Standard series

ISO/IEC 11801.

Figure 1 below shows the inter-relationship between the ISO/IEC 11801 series and other

International Standards and for cabling systems with related standards.
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ISO/IEC 14763-3:2014/AMD1:2018 – 3 –
© ISO/IEC 2018
NOTE ISO/IEC 15018 has been replaced by ISO/IEC 11801-4.
Figure 1 – Relationship of related International Standards

ISO/IEC 14763-3 details the inspection and test procedures for optical fibre cabling,

a) designed in accordance with premises cabling standards including the ISO/IEC 11801

series, and

b) installed according to the requirements and recommendations of ISO/IEC 14763-2.

In the NOTE, replace "ISO/IEC 11801" with "ISO/IEC 11801-1".
1 Scope
Replace "ISO/IEC 11801, ISO/IEC 24764, ISO/IEC 24702 and ISO/IEC 15018" with
"the ISO/IEC 11801 series".
2 Normative references
Replace the reference to ISO/IEC 11801 with the following new reference:

ISO/IEC 11801-1, Information technology – Generic cabling for customer premises – Part 1:

General requirements
Replace the reference to IEC 61300-3-35:2009 with the following new reference:

IEC 61300-3-35, Fibre optic interconnecting devices and passive components – Basic test

and measurement procedures – Part 3-35: Examinations and measurements – Visual
inspection of fibre optic connectors and fibre-stub transceivers
Clauses 3, 6, 8, 9, 10, E.1, F.1, G.1 and G.2

Replace all instances of "ISO/IEC 11801" in these clauses with "ISO/IEC 11801-1".

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– 4 – ISO/IEC 14763-3:2014/AMD1:2018
© ISO/IEC 2018
3.1 Terms and definitions
Add the following new terms and definitions:
surface feature such as pits, chips and loose debris
loose debris
particles and debris on the surface that can be removed by cleaning
permanent non-linear surface damage
permanent linear surface damage
3.2 Abbreviations
Add the following new abbreviation:
LC LC connector
Replace the existing MPO abbreviation with the following:
MPO Multi-fibre Push On connector (based on rectangular ferrule) General
Add the following new paragraphs after the first paragraph:

According to ISO/IEC 11801-1, a channel does not include the connector on the equipment

cords that interfaces with the network equipment. The optical attenuation limits specified for

network equipment take into account the attenuation associated with the connections of the

equipment to the installed cabling.

The testing of a channel utilizes the customer’s equipment cords at both ends of the channel

and these cords are left in place after testing. The channel test method is normally used to

measure the attenuation of a channel at the time of service implementation or maintenance.

The channel and link test method requires a new reference for any change of connection at

the light source and/or the power meter between tests since the connection between source

and connected cord should never be disturbed after a reference measurement has been


Inspect and clean when necessary the connector interfaces of the source, the launch test

cord, the tail test cord and substitution test cord.

Allow sufficient time for light source stabilization in accordance with light source

manufacturer’s recommendations.
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ISO/IEC 14763-3:2014/AMD1:2018 – 5 –
© ISO/IEC 2018 Enhanced three-test-cord attenuation measurement test method of installed

Replace with the following: Channel test method
The procedure for channel testing is as follows.

a) Connect the launch test cord (LTC) to the light source (LS) at one end and to the

equipment (EQP) cord at the other end. Connect equipment cord to the power meter

(PM). Allow sufficient time for the light source stabilization in accordance with light source

manufacturer’s recommendations. (See Figure 8). Since this reference measurement is

carried out with a near end EQP cord, the defect of near end EQP cord may not be found.

When this test method is used, the quality of the near end EQP cord shall comply with the

Figure 8 – Connection of LS – LTC – Near end EQP cord – PM for reference setting

b) The reference measurement, P , shall be recorded in watts (W) or decibel-milliwatts


c) The near end EQP cord is disconnected from the power meter and the LTC‐EQP cord

combination is reconnected to the fixed cable of the channel under test.

d) At the far end of the channel, connect the far end EQP cord to the power meter, see

Figure 20).
Figure 20 – Connections to channel test for attenuation measurement

e) The power P is measured directly at the far end EQP cord. The measurement, P , shall

1 1
be recorded in watts (W) or decibel-milliwatts (dBm).
f) The attenuation of the channel is:
A = P – P (dB) (1)
r 1
where P and P are expressed in dBm.
1 r

If P and P are expressed in W, then the measured attenuation can be calculated as

1 r
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– 6 – ISO/IEC 14763-3:2014/AMD1:2018
© ISO/IEC 2018
A = –10 lg(P /P ) (dB) (2)
1 r
The channel testing is carried out in one direction only.

For this method, the measurement uncertainties at 95 % confidence level are as follows.

SMF: ± 0,16 dB for fibre length < 2 km.
MMF: ± 0,19 dB when measured attenuation ≤ 1,4 dB.
MMF: ± 0,14 × measured attenuation when measured attenuation > 1,4 dB.

NOTE Measurement uncertainties are determined using IEC TR 61282-14 and representative system data. See

IEC TR 61282-14 for more details. Test method for links using the one-test-cord reference method
Replace the subclause title with the following: Link test method using the one-cord method and enhanced-three-test-cord
reference method
Annex B (normative) Visual inspection criteria for connectors
Replace Annex B with the following:
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ISO/IEC 14763-3:2014/AMD1:2018 – 7 –
© ISO/IEC 2018
Annex B
Visual inspection and cleaning of optical fibre cabling interfaces
B.1 Specified optical fibre cabling interfaces

The different international cabling standards specify the following optical fibre cabling


a) LC connector simplex and duplex connectors both in multimode and single-mode PC and

single mode APC configuration and adapters;

b) MPO connectors (male and female) in multimode PC and single-mode APC configuration

and adapters.

Since different configurations are possible, Annex B explains the visual inspection criteria

and cleaning recommendations for each configuration of the LC and MPO cabling interface.

B.2 The inspection equipment
The inspection equipment that shall be used is specified in IEC 61300-3-35.

All possible connectors in multimode and single-mode fibre configurations specified in

structured cabling standards shall be inspected with a low-resolution microscope.

Low resolution means that the microscope shall have a field of view of at least 250 microns.

The fibre shall be maximum 50 % of the image on the microscope in the vertical axis.

The capability of the microscope for detecting 2 μm targets and the correct field of view can

be determined by use of, for example, a chrome on glass artefact with 2 μm targets and a

250 μm circle. The user should contact the equipment supplier for such an artefact. Other

artefacts that determine the capability of the microscopes to detect 2 μm defects/scratches

may be used.
There are different types of microscopes available on the market.

Direct viewing microscopes are in general lower cost. Very important with this type of

equipment is that the microscope shall contain a built-in laser safety filter.

The laser filter is to control the energy which is directed into the eye from active sources in

the cabling. When direct viewing is used one should ensure that no laser or equipment with

lasers is active on the cabling. See IEC 60825-2 for regulations regarding laser safety of

optical fibre communication systems.

Video microscopes contain a lens which transfers via a camera the magnified image on a

display. Video microscopes provide more laser safety than direct viewing microscopes.

Low resolution microscopes as specified in IEC 61300-3-35 with automated analysis are

available on the market.

All microscope systems show system-to-system variability and a 100 % match between

inspection results of multiple microscopes according to IEC 61300-3-35 is not achievable at

this moment. This is even the case when microscopes of the same brand and type are

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– 8 – ISO/IEC 14763-3:2014/AMD1:2018
© ISO/IEC 2018

NOTE Some microscopes are available with floodlight (side illumination); these are particular handy when

inspecting MPOs for dirt.
Figure B.1 – Normal illumination of Figure B.2 – Same ferrule with floodlight
male MPO
B.3 Return loss requirements for cabling interfaces
B.3.1 General
Cabling interfaces have 3 major sets of requirements:
a) multimode 20 dB for cylindrical (LC) and rectangular ferrules (MPO);
b) single-mode 35 dB PC for cylindrical ferrules only (LC);
c) single-mode 60 dB APC for cylindrical (LC) and rectangular ferrules (MPO).
For each of these 3 sets, Annex B shows the requirements, and the cleaning

recommendations both as free connector (channel) and connector inside an adapter (link).

B.3.2 Multimode cylindrical and rectangular ferrules (20 dB return loss)
B.3.2.1 General requirements

The following inspection zones and requirements shall be followed when the end faces of

multimode connectors are inspected. The inspection shall be carried out in accordance with

IEC 61300-3-35.

The contact zones of all connector types shall be inspected for dirt and loose particles, for

MPO cabling interfaces the contact zone is the complete ferrule end face. This inspection

becomes very easy when microscopes with very low resolution with floodlight are used, see

Figure B.1 and Figure B.2. Inspection for dirt shall always be followed by low-resolution

inspection of the polished fibres for scratches and defects according to Table B.1. Scratches

and defects are counted separately.

The inspection requirements of IEC 61300-3-35 apply. For the convenience of the user,

Table B.1 contains the requirements of IEC 61300-3-35:2015 (which is the current standard

at the time of publication of this document). At the time of inspection, users of this document

shall verify if Table B.1 is in line with the requirements of the then valid IEC 61300-3-35.

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ISO/IEC 14763-3:2014/AMD1:2018 – 9 –
© ISO/IEC 2018
Table B.1 – Inspection requirements for cabling interfaces
with 20 dB return loss
Zone Scratches Defects
(diameter) (maximum number (maximum number
of a given dimension) of a given dimension)
A: core
No limit ≤ 3 µm 3 ≤ 5 µm
a a
0 µm to 65 µm
None > 3 µm None > 5 µm
10 ≤ 5 µm
B: cladding No limit ≤ 5 µm
65 µm to 115 µm None > 5 µm
None > 5 µm

NOTE 1 Outside the core and cladding zone there are only cleanliness requirements.

The recommended inspection area for cylindrical ferrules is limited to 250 µm diameter. Ten particles

of ≤ 5µm diameter are allowed. There are no requirements for the area outside the 250 µm zone.

Cleaning loose debris beyond this region is recommended good practice.
For rectangular ferrules, it is recommended to inspect the e

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