ISO/IEC 14763-3:2024

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

ISO/IEC 14763-3:2024 specifies systems and methods for the inspection and testing of installed optical fibre cabling designed in accordance with premises cabling standards including the ISO/IEC 11801 series. The test methods refer to existing standards-based procedures where they exist.
This third edition cancels and replaces the second edition published in 2014 and Amendment 1:2018. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) removal of plastic fibre testing;
b) addition of testing of MPO cabling;
c) restructuring of the content;
d) addition of end-to-end link LSPM testing;
e) addition of MPTL LSPM testing;
f) addition of measurement uncertainty for all measurement methods;
g) introduction of normative inspection for cleanliness to align with the ISO/IEC 11801 series;
h) testing will support SM ranges up to 10 km;
i) introduction of new test limits for connector attenuation against reference connector;
j) introduction of description of reference connectors;
k) introduction of recommended cleaning methods.

General Information

• Status: Published
• Publication Date: 21-May-2024
• ICS: 35.200 - Interface and interconnection equipment
• Technical Committee: ISO/IEC JTC 1/SC 25 - Interconnection of information technology equipment
• Drafting Committee: WG 3 - ISO/IEC JTC 1/SC 25/WG 3
• Current Stage: PPUB - Publication issued
• Start Date: 22-May-2024
• Completion Date: 31-May-2024

Relations

• Revises: ISO/IEC 14763-3:2014/COR1:2015 - Corrigendum 1 - Information technology - Implementation and operation of customer premises cabling - Part 3: Testing of optical fibre cabling
• Effective Date: 05-Sep-2023
• Revises: ISO/IEC 14763-3:2014 - Information technology - Implementation and operation of customer premises cabling - Part 3: Testing of optical fibre cabling
• Effective Date: 05-Sep-2023
• Revises: 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
• Effective Date: 05-Sep-2023

Overview

ISO/IEC 14763-3:2024 - Information technology - Implementation and operation of customer premises cabling - Part 3: Testing of optical fibre cabling - specifies systems and methods for inspection and testing of installed optical-fibre cabling in premises cabling systems (including the ISO/IEC 11801 series). This third edition (2024) is a technical revision that updates test methods, removes plastic-fibre testing, and adds support for MPO, MPTL and end-to-end (E2E) LSPM testing, measurement uncertainty, and normative cleanliness inspection.

Key topics and requirements

• Scope and purpose: Defines accepted procedures for visual inspection, attenuation and return-loss measurement, OTDR testing, continuity, polarity and length measurement of fibre cabling.
• Test methods: Includes LSPM (Light Source and Power Meter) methods, OTDR procedures, and enhanced three-test-cord methods for MPO to MPO links.
• Test equipment and test cords: Specifies requirements for light sources, power meters, OTDRs, launch/tail/substitution test cords, connectors and reference adaptors.
• Measurement uncertainty: Adds explicit guidance on calculating and reporting measurement uncertainty for all measurement methods.
• Connectors and limits: Introduces new test limits for connector attenuation against reference connectors and descriptions of reference connectors.
• Cleanliness and cleaning: Introduces normative inspection for connector cleanliness and recommended cleaning procedures (annexes include LC and MPO cleaning procedures).
• Extended ranges: Testing now supports single-mode (SM) ranges up to 10 km.
• Documentation: Defines required test-result documentation and quality planning guidance for acceptance and troubleshooting.

Practical applications

• Acceptance testing and certification of premises optical-fibre installations after installation and during maintenance.
• Commissioning and troubleshooting of LAN, data centre and enterprise fibre infrastructure including MPO multi-fibre trunks and MPTL (Modular Plug Terminated Links).
• Defining procurement and acceptance criteria for cabling components and test equipment.
• Providing standardized procedures for test houses, installers, network engineers, facility managers and auditors to ensure repeatable, compliant test results.

Who should use this standard

• Cabling installers and certified technicians performing acceptance and maintenance testing
• Network and data centre engineers responsible for cabling performance
• Test equipment manufacturers and calibration labs
• System integrators, facility managers and compliance auditors specifying or verifying premises cabling

Related standards

• ISO/IEC 11801 series (premises cabling design and performance)
• Other standards-based procedures referenced within ISO/IEC 14763-3:2024 for specific measurement techniques

Keywords: ISO/IEC 14763-3:2024, optical fibre cabling testing, LSPM, OTDR testing, MPO testing, premises cabling, measurement uncertainty, connector cleaning, MPTL, end-to-end link testing.

Standards Content (Sample)

ISO/IEC 14763-3
Edition 3.0 2024-05
INTERNATIONAL
STANDARD
colour
inside
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 3.0 2024-05
INTERNATIONAL
STANDARD
colour
inside
Information technology – Implementation and operation of customer premises

cabling –
Part 3: Testing of optical fibre cabling

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 35.200 ISBN 978-2-8322-8857-3

– 2 – ISO/IEC 14763-3:2024 © ISO/IEC 2024
CONTENTS
FOREWORD . 7
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 10
3 Terms, definitions, abbreviated terms and symbols . 11
3.1 Terms and definitions . 11
3.2 Abbreviated terms . 15
3.3 Symbols . 16
4 Conformance . 16
5 Test equipment . 17
5.1 General requirements . 17
5.2 Documentation . 17
5.3 Apparatus . 17
5.4 Light source and power meter . 17
5.4.1 Light source . 17
5.4.2 Power meter . 19
5.5 OTDR . 19
5.5.1 General . 19
5.5.2 OTDR requirements . 20
5.6 Test cord connectors . 21
5.6.1 Connecting hardware at test interfaces . 21
5.6.2 Connecting hardware attenuation requirements . 21
5.6.3 Mechanical requirements for reference connectors . 22
5.6.4 Reference adaptors at test interfaces . 24
5.7 Test cord characteristics . 24
5.7.1 General . 24
5.7.2 LSPM launch test cord . 24
5.7.3 LSPM tail test cord . 25
5.7.4 LSPM substitution test cord . 25
5.7.5 OTDR launch test cord . 25
5.7.6 OTDR tail test cord . 26
5.8 Visual inspection equipment. 26
6 Testing . 27
6.1 General . 27
6.2 Reference planes . 27
6.3 Wavelength of measurement . 30
6.4 Direction of measurement . 30
6.5 Protection of transmission and terminal equipment . 30
6.6 Use of test equipment . 30
6.7 Relevance of measurement . 30
6.8 Visual inspection for cleanliness and cleaning of cabling interfaces . 30
6.9 Testing of installed cabling . 31
6.9.1 General . 31
6.9.2 Attenuation of single fibre connector cabling – LSPM . 31
6.9.3 Attenuation of multi-fibre connector cabling – LSPM . 43
6.9.4 Attenuation of link and channel by means of OTDR testing . 53

6.9.5 Propagation delay . 57
6.9.6 Length . 57
6.9.7 Optical fibre continuity . 59
6.9.8 Cabling polarity . 59
6.9.9 Optical fibre core size . 59
7 Performance assessment of installed cabling components using OTDR . 59
7.1 General . 59
7.2 OTDR basis . 59
7.3 Fundamental parameters that define the operational capability of an OTDR . 60
7.3.1 Dynamic range . 60
7.3.2 Dynamic margin . 61
7.3.3 Pulse width . 61
7.3.4 Averaging time . 61
7.3.5 Dead zone . 61
7.3.6 Group index . 61
7.3.7 Measurement range . 62
7.3.8 Distance sampling . 62
7.3.9 Event threshold . 62
7.4 Bi-directional measurement . 62
7.5 Attenuation of optical fibre cable . 63
7.5.1 Test method . 63
7.5.2 Treatment of results . 64
7.6 Attenuation of local and remote test interfaces . 64
7.6.1 Test method . 64
7.6.2 Test system measurement uncertainties . 65
7.6.3 Treatment of results . 65
7.7 Attenuation of connecting hardware . 66
7.7.1 Test method . 66
7.7.2 Test system measurement uncertainties . 67
7.7.3 Treatment of results . 67
7.8 Return loss of connecting hardware . 68
7.8.1 General . 68
7.8.2 Test method . 68
7.8.3 Test system measurement uncertainties . 69
7.8.4 Treatment of results . 69
7.9 Optical fibre length . 70
7.9.1 Test method . 70
7.9.2 Measurement uncertainties . 72
7.9.3 Treatment of results . 72
8 Test result documentation . 73
Annex A (normative) Test cord attenuation verification . 74
A.1 General requirements . 74
A.2 Attenuation (test and substitution test cord reference connections) . 74
Annex B (informative) Quality planning . 76
B.1 General . 76
B.2 Specification of cabling components . 77
B.3 Treatment of non-compliant results . 77

– 4 – ISO/IEC 14763-3:2024 © ISO/IEC 2024
Annex C (informative) Examples of calculations of channel and permanent link limits . 78
C.1 Channel measurement . 78
C.2 Permanent link measurement . 79
Annex D (informative) Optional inspection of polished end face of test connectors. 80
Annex E (normative) Cleaning of connectors. 82
E.1 General . 82
E.2 Cleaning procedure for LC multimode cabling interface . 82
E.3 Cleaning procedure for the LC single-mode cabling interfaces . 83
E.4 Cleaning procedure for the LC/APC single-mode cabling interfaces . 84
E.5 Cleaning procedure for single-mode (SM) MPO APC cabling interface . 85
Annex F (normative) MPO to MPO link or permanent link – enhanced-three-test-cord
method LSPM . 86
F.1 General . 86
F.2 Requirements for the test system . 86
F.3 Test method . 86
F.4 Measurement uncertainties . 88
F.5 Treatment of results . 88
Bibliography . 89

Figure 1 – Relationship of related International Standards . 9
Figure 2 – OTDR characterization using a launch test cord and a tail test cord . 21
Figure 3 – An example of test cord labelling and identification . 24
Figure 4 – OTDR launch test cord and tail test cord schematic . 25
Figure 5 – Normal illumination (left) and illumination with floodlight (right) . 27
Figure 6 – Representative reference planes for channels, links, permanent links, E2E
links, MPTL . 28
Figure 7 – Test reference planes . 29
Figure 8 – Fibre end face cleaning cycle . 31
Figure 9 – Connection of LS to LTC to PM for reference setting . 33
Figure 10 – Connection of LTC to TTC to verify attenuation of reference connectors . 33
Figure 11 – Connections to link or permanent link for attenuation measurement . 34
Figure 12 – Connection of LS to LTC to PM for reference setting . 36
Figure 13 – Connection of LTC to TTC to verify attenuation of reference connectors . 36
Figure 14 – Connections to E2E link for attenuation measurement . 37
Figure 15 – Connection of LS to LTC to near end EQP cord to PM for reference setting . 39
Figure 16 – Connections to channel test for attenuation measurement . 39
Figure 17 – Connection of LS to LTC to PM for reference setting . 41
Figure 18 – Connection of LTC to TTC to verify attenuation of reference connectors . 41
Figure 19 – Connections to MPTL for attenuation measurement . 42
Figure 20 – Connection of LS to LTC to PM for reference setting . 44
Figure 21 – Connection of LTC to TTC for test‐cord verification . 44
Figure 22 – Connections to link or permanent link attenuation . 45
Figure 23 – Connection of LS to LTC to PM for reference setting . 47
Figure 24 – Connection of LTC to PCTC to TTC to verify the attenuation of reference
connectors . 47

Figure 25 – Connections to E2E link for attenuation measurement . 48
Figure 26 – Connection of LS to LTC to PM for reference setting . 50
Figure 27 – Connection of LTC to TTC for test‐cord verification . 50
Figure 28 – Connection of LTC to PCTC to TTC for enhanced-three‐test‐cord verification . 50
Figure 29 – MPO to single fibre link attenuation testing where no pin conversion is
required on launch test cord. 51
Figure 30 – MPO to single fibre link attenuation testing where pin conversion is
required on LTC . 51
Figure 31 – OTDR measurement of installed cabling (permanent link) – linear
regression measurement method . 54
Figure 32 – OTDR measurement of installed cabling (channel): two-point attenuation
measurement method . 56
Figure 33 – OTDR measurement of optical fibre attenuation . 64
Figure 34 – OTDR measurement of connection attenuation. 66
Figure 35 – OTDR measurement of joint attenuation . 67
Figure 36 – OTDR measurement of return loss . 69
Figure 37 – Determination of length using an OTDR . 71
Figure 38 – OTDR characterization of a SMF permanent link containing a break . 71
Figure 39 – OTDR characterization of a permanent link containing a macrobend . 72
Figure A.1 – Measurement of launch test cord, tail test cord and substitution test cord
interface attenuation . 74
Figure E.1 – Example of multimode LC channel interface . 82
Figure E.2 – Example of multimode LC link interface . 82
Figure E.3 – Example of MPO channel interface . 83
Figure E.4 – Example of MPO link interface . 83
Figure E.5 – Example of MPO ferrule with normal illumination (left) and side
illumination (right) . 83
Figure E.6 – Example of single-mode LC channel interface . 84
Figure E.7 – Example of single-mode LC link interface . 84
Figure E.8 – Example of single-mode LC/APC channel interface . 84
Figure E.9 – Example of single-mode LC/APC link interface . 84
Figure E.10 – Example of SM MPO APC channel interface . 85
Figure E.11 – Example of SM MPO/APC link interface . 85
Figure F.1 – Connection of LS to LTC to PM for reference setting . 87
Figure F.2 – Connection of LTC to STC to TTC for enhanced-three‐test‐cord
verification . 87
Figure F.3 – Connections to link or permanent link for attenuation measurement where
no pin conversion is required on test cords . 87

Table 1 – MMF spectral requirements . 19
Table 2 – SMF spectral requirements . 19
Table 3 – Connector identification and attenuation test limits . 22
Table 4 – Single fibre MM reference connector requirements . 22
Table 5 – Single fibre single-mode reference connector requirements . 23
Table 6 – Multi-fibre MM reference connector requirements . 23

– 6 – ISO/IEC 14763-3:2024 © ISO/IEC 2024
Table 7 – Multi-fibre single-mode reference connector requirements . 23
Table 8 – Default group index values . 62
Table 9 – Default backscattering coefficient values . 70
Table D.1 – Cladding zone requirements of reference connectors . 80
Table D.2 – Core zone requirements of reference connectors . 81

INFORMATION TECHNOLOGY –
IMPLEMENTATION AND OPERATION
OF CUSTOMER PREMISES CABLING –

Part 3: Testing of optical fibre cabling

FOREWORD
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participate in the development of International Standards through technical committees established by the
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ISO/IEC 14763-3 has been prepared by subcommittee 25: Interconnection of information
technology equipment, of ISO/IEC joint technical committee 1: Information technology. It is an
International Standard.
This third edition cancels and replaces the second edition published in 2014 and
Amendment 1:2018. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) removal of plastic fibre testing;
b) addition of testing of MPO cabling;
c) restructuring of the content;
d) addition of end-to-end link LSPM testing;
e) addition of MPTL LSPM testing;
f) addition of measurement uncertainty for all measurement methods;

– 8 – ISO/IEC 14763-3:2024 © ISO/IEC 2024
g) introduction of normative inspection for cleanliness to align with the ISO/IEC 11801 series;
h) testing will support SM ranges up to 10 km;
i) introduction of new test limits for connector attenuation against reference connector;
j) introduction of description of reference connectors;
k) introduction of recommended cleaning methods.
The text of this International Standard is based on the following documents:
Draft Report on voting
JTC1-SC25/3214/FDIS JTC1-SC25/3239/RVD

Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
A list of all parts in the ISO/IEC 14763 series, published under the general title Information
technology – Implementation and operation of customer premises cabling, can be found on the
IEC website.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1, available at www.iec.ch/members_experts/refdocs
and www.iso.org/directives.
IMPORTANT – The "colour inside" logo on the cover page of this document 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
This document has been prepared in support of the International Standard series
ISO/IEC 11801.
Figure 1 shows the inter-relationship between the ISO/IEC 11801 series and other International
Standards and for cabling systems with related standards.

Figure 1 – Relationship of related International Standards
This document details the inspection and test procedures for optical fibre cabling designed in
accordance with premises cabling standards including the ISO/IEC 11801 series and installed
in accordance with the requirements and recommendations of ISO/IEC 14763-2.
Users of this document should be familiar with relevant premises cabling standards and
ISO/IEC 14763-2.
The quality plan for each installation will define the acceptance tests and sampling levels
selected for that installation. Requirements and recommendations for the development of a
quality plan are given in ISO/IEC 14763-2.

– 10 – ISO/IEC 14763-3:2024 © ISO/IEC 2024
INFORMATION TECHNOLOGY –
IMPLEMENTATION AND OPERATION
OF CUSTOMER PREMISES CABLING –

Part 3: Testing of optical fibre cabling

1 Scope
This part of ISO/IEC 14763 specifies systems and methods for the inspection and testing of
installed optical fibre cabling designed in accordance with premises cabling standards including
the ISO/IEC 11801 series. The test methods refer to existing standards-based procedures
where they exist.
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.
ISO/IEC 11801-1, Information technology – Generic cabling for customer premises – Part 1:
General requirements
ISO/IEC 14763-2, Information technology – Implementation and operation of customer premises
cabling – Part 2: Planning and installation
IEC 60050-731, International Electrotechnical Vocabulary – Part 731: Optical fibre
communication (available at http://www.electropedia.org/)
IEC 60825-2, Safety of laser products – Part 2: Safety of optical fibre communication systems
(OFCSs)
IEC 61280-1-3, Fibre optic communication subsystem test procedures – Part 1-3: General
communication subsystems – Measurement of central wavelength, spectral width and additional
spectral characteristics
IEC 61280-1-4, Fibre optic communication subsystem test procedures – Part 1-4: General
communication subsystems – Light source encircled flux measurement method
IEC 61280-4-1, Fibre-optic communication subsystem test procedures – Part 4-1: Installed
cabling plant – Multimode attenuation measurement
IEC 61280-4-5, Fibre-optic communication subsystem test procedures – Part 4-5: Installed
cabling plant – Attenuation measurement of MPO terminated fibre optic cabling plant using test
equipment with MPO interfaces
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

IEC 61300-3-42, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-42: Examinations and measurements – Attenuation of single
mode alignment sleeves and or adaptors with resilient alignment sleeves
IEC 61315, Calibration of fibre-optic power meters
IEC 61746-1, Calibration of optical time-domain reflectometers (OTDR) – Part 1: OTDR for
single mode fibres
IEC 61746-2, Calibration of optical time-domain reflectometers (OTDR) – Part 2: OTDR for
multimode fibres
IEC 61755-2-4, Fibre optic interconnecting devices and passive components – Connector
optical interfaces – Part 2-4: Connection parameters of non-dispersion shifted single-mode
physically contacting fibres – Non-angled for reference connection applications
IEC 61755-2-5, Fibre optic interconnecting devices and passive components – Connector
optical interfaces – Part 2-5: Connection parameters of non-dispersion shifted single-mode
physically contacting fibres – Angled for reference connection applications
IEC 61755-3-1, Fibre optic connector optical interfaces – Part 3-1: Optical interface, 2,5 mm
and 1,25 mm diameter cylindrical full zirconia PC ferrule, single mode fibre
IEC 61755-3-2, Fibre optic connector optical interfaces – Part 3-2: Optical interface, 2,5 mm
and 1,25 mm diameter cylindrical full zirconia ferrules for 8 degrees angled-PC single mode
fibres
IEC 61755-3-31, Fibre optic interconnecting devices and passive components – Connector
optical interfaces – Part 3-31: Connector parameters of non-dispersion shifted single mode
physically contacting fibres – Angled polyphenylene sulphide rectangular ferrules
IEC 62614-1, Fibre optics – Multimode launch conditions – Part 1: Launch condition
requirements for measuring multimode attenuation
IEC PAS 63267-3-31, Fibre optic interconnecting devices and passive components – Fibre optic
connector optical interfaces – Part 3-31: End face geometry – Flat PC PPS rectangular ferrule
multimode fibres
3 Terms, definitions, abbreviated terms and symbols
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/IEC 11801-1,
IEC 60050-731 and the following 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
3.1.1
adaptor
device that enables interconnection between terminated optical fibre cables

– 12 – ISO/IEC 14763-3:2024 © ISO/IEC 2024
3.1.2
attenuation
A
reduction in optical power induced by transmission through a medium such as optical fibre,
given as A = −10 log (P /P ), where P and P are the power, typically measured in mW,
out in in out
into and out of the cabling
Note 1 to entry: The values of A are in decibel (dB)
3.1.3
attenuation dead zone
region on an OTDR after the event where the displaced
trace deviates from the undisturbed backscatter trace by more than a given vertical distance ∆F
Note 1 to entry: ∆F is commonly accepted to be a value of 0,5 dB
[SOURCE: IEC 61746-1:2009, and IEC 61746-2:2010, 3.3, modified – The note has been
changed and Figure 1 has not been included.]
3.1.4
bi-directional measurement
technique consisting of two measurements of the same optical fibre, made by launching light
into opposite ends of that fibre
3.1.5
cable sheath
covering over the optical fibre or conductor assembly that can include one or more metallic
members, strength members or jackets
Note 1 to entry: Sometimes simply referred to as "sheath".
3.1.6
connection
mated device including terminations connecting two cables or cable elements
3.1.7
encircled flux
fraction of cumulative near-field power to the total output power as a function of radial distance
from the optical centre of the core
3.1.8
fail result
measured value which fails to meet the specified requirement and where the absolute value of
the difference between the measured value and the specified requirement is greater than the
stated measurement uncertainty
3.1.9
launch test cord
cable assembly used to connect from a light source to the cabling under test or as part of a test
reference measurement
3.1.10
light source and power meter
test system consisting of a light source (LS), power meter (PM) and associated test cords used
to measure the attenuation of installed cable plant

3.1.11
marginal result
measured value which differs from the specified requirement by an amount not exceeding the
stated measurement uncertainty
3.1.12
multimode fibre
optical fibre along whose core the radiation of two or more bound modes can propagate at the
wavelength of interest
Note 1 to entry: A typical multimode fibre propagates 100 modes or more.
[SOURCE: IEC 60050-731:1991, 731-02-03, modified – The definition has been slightly
changed and Note 1 to entry added.]
3.1.13
optical fibre
waveguide shaped as a filament, made of dielectric materials for guiding optical waves
[SOURCE: IEC 60050-151:2001/AMD3:2019, 151-12-35]
3.1.14
optical time domain reflectometer
OTDR
test system consisting of an optical time-domain reflectometer and associated test cords used
to characterize and measure the attenuation of installed cable plant and specific elements within

that cable plan
3.1.15
pass result
measured value which meets the specified requirements and where the absolute value of the
difference between the measured value and the specified requirement is greater than the stated
measurement uncertainty, provided any apparent gain does not exceed the measurement
uncertainty
3.1.16
pin conversion test cord
PCTC
cord used to change the mated connector from pinned to unpinned, and vice versa when there
is a pinning incompatibility between the launch test cord and link under test.
3.1.17
reference adaptor
adaptor with tightened tolerances (for example, a single-mode adaptor), to ensure reference
connections can be attained
3.1.18
reference connector
connector with tightened tolerances terminated onto an optical fibre that can require tightened
tolerances such that the expected attenuation formed by mating two such assemblies is less
than or equal to a specified value that is lower than the normal expected attenuation
3.1.19
reference measurement
measurement of the output power of the light source that is used to determine the input power
level to the cabling under test

– 14 – ISO/IEC 14763-3:2024 © ISO/IEC 2024
3.1.20
reference plane
theoretical plane without thickness or tolerances.
Note 1 to entry: The reference plane is used to define spaces in mechanical structures.
[SOURCE: IEC 60050-581:2008, 581-25-30]
3.1.21
single-mode fibre
optical fibre which supports only one mode of light transmission
3.1.22
substitution test cord
test cord used within a reference measurement which is replaced during the measurement of
the attenuation of the cabling under test
3.1.23
tail test cord
cable assembly used to connect from a power meter to the cabling under test or as part of a
test reference measurement
3.1.24
test cord
cable assembly used either to connect test equipment to the cabling under test or as part of a
test reference measurement
3.1.25
test operator
skilled person who tests in accordance with instructions provided by the test system designer
3.1.26
test system
test equipment, test cords and adaptors necessary to undertake a given test in accordance with
the requirements of this document
3.1.27
defect
surface feature such as pits, scratches, chips and loose debris
3.1.28
loose debris
particles and debris on the surface that can be removed by cleaning
3.1.29
pit
permanent non-linear surface damage
3.1.30
scratch
permanent linear surface damage

3.2 Abbreviated terms
For the purposes of this document, the abbreviated terms of ISO/IEC 11801-1 and the following
apply.
APC angled physical contact
BIMMF bend insensitive multimode fibre referred to as enhanced macrobend loss fibre
CP consolidation point
DUT device under test
EQP equipment
E2E end-to-end
EC equipment cord
ffs for further study
IOR index of refraction
LC LC connector
LTC launch test cord
LS light source
MF multi fibre
MM multimode
MMF multimode fibre
MPO multi-fibre push on (based on rectangular ferrule)
MPTL modular plug terminated link
N/A not applicable
OTDR optical time domain reflectometer
PC physical contact
PCTC pin conversion test cord
PM power meter
RL return loss
RMS root mean square
SC subscriber connector
SF single fibre
SFC single fibre connector
SM single-mode
SMF single-mode fibre
STC substitution test cord
TTC tail test cord
– 16 – ISO/IEC 14763-3:2024 © ISO/IEC 2024
3.3 Symbols
For the purposes of this document the following symbols apply.
Optical fibre connector (general)

Optical fibre connector on installed cabling

Optical fibre connector with reference termination

Optical fibre adaptor (general)

Optical fibre adaptor embedded in cabling

Optical fibre reference adaptor

Splice
4 Conformance
To test installed cabling in accordance with this document:
a) the reference connectors shall conform to the requirements of 5.6;
b) the requirements of Clause 6 shall be met;
c) the test equipment and test cords shall conform to the requirements of Clause 5;
d) the test method, as appropriate, and treatment of results shall conform to Clauses 6 and 7;
e) information about the test equipment shall be documented in accordance with 5.2;
f) the test results shall be documented in accordance with Clause 6 and
ISO/IEC 14763-2:2019, 10.3.3.
To inspect installed cabling in accordance with this document:
1) the inspection equipment shall conform to the requirements of 5.8;
2) the inspection method, as appropriate, shall conform to 6.8.
This document does not specify which test or sampling level is to be adopted as this is specified
in the quality plan (see Annex B) meeting the requirement
...