IEC 60794-2-23:2024

Optical fibre cables - Part 2-23: Indoor cables - Detail specification for multi-fibre cables for use in MPO connector terminated cable assemblies

IEC 60794-2-23: 2024 is a detail specification and specifies indoor multi-fibre cables for use in MPO (multi-fibre push on) connector terminated cable assemblies.

Câbles à fibres optiques - Partie 2-23: Câbles intérieurs - Spécification particulière pour les câbles multifibres utilisés dans les câbles assemblés équipés de connecteurs MPO

IEC 60794-2-23: 2024 est une spécification particulière portant sur les câbles multifibres intérieurs destinés à être utilisés dans les câbles assemblés équipés de connecteurs MPO (multi-fibre push on).

General Information

• Status: Published
• Publication Date: 30-Jan-2024
• ICS: 33.180.10 - Fibres and cables
• Technical Committee: SC 86A - Fibres and cables
• Current Stage: PPUB - Publication issued
• Start Date: 31-Jan-2024
• Completion Date: 02-Feb-2024

Standards Content (Sample)

IEC 60794-2-23 ®
Edition 1.0 2024-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibre cables –
Part 2-23: Indoor cables – Detail specification for multi-fibre cables for use in
MPO connector terminated cable assemblies

Câbles à fibres optiques –
Partie 2-23: Câbles intérieurs – Spécification particulière pour les câbles
multifibres utilisés dans les câbles assemblés équipés de connecteurs MPO
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IEC 60794-2-23 ®
Edition 1.0 2024-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibre cables –
Part 2-23: Indoor cables – Detail specification for multi-fibre cables for use in

MPO connector terminated cable assemblies

Câbles à fibres optiques –
Partie 2-23: Câbles intérieurs – Spécification particulière pour les câbles

multifibres utilisés dans les câbles assemblés équipés de connecteurs MPO

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10  ISBN 978-2-8322-8135-2

– 2 – IEC 60794-2-23:2024 © IEC 2024
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Construction . 6
4.1 General . 6
4.2 Optical fibres . 7
4.3 Ribbon structure . 7
4.4 Strength and anti-buckling members . 7
4.5 Ripcord . 7
4.6 Cable sheath . 7
4.7 Sheath marking . 7
4.8 Example of cable construction . 7
5 Tests . 7
5.1 General . 7
5.2 Dimensions . 8
5.3 Mechanical requirements . 8
5.3.1 General . 8
5.3.2 Tensile performance . 8
5.3.3 Crush . 9
5.3.4 Impact . 9
5.3.5 Bending . 9
5.3.6 Repeated bending . 10
5.3.7 Torsion . 10
5.3.8 Kink . 10
5.3.9 Abrasion resistance of cable marking . 11
5.4 Environmental requirements . 11
5.4.1 Temperature cycling . 11
5.4.2 Sheath shrinkage . 12
6 Transmission requirements . 12
7 Fire performance . 12
Annex A (normative) Cable sample preparation for bending and temperature cycling
test . 13
Annex B (informative) Examples of cable constructions . 14
B.1 Optical cables for use in MPO connector terminated cable assemblies, with
single sheath . 14
B.2 Optical cables for use in MPO connector terminated cable assemblies, with
double sheath . 14
Bibliography . 15

Figure A.1 – Sample preparation and length for multi-fibre cables for use in MPO
connector terminated cable assemblies. 13
Figure B.1 – Example of a cross-section of a 12-fibre cable with single sheath . 14
Figure B.2 – Example of a cross-section of a 12-fibre cable with double sheath . 14

Table 1 – Preferred low and high temperatures . 11

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 2-23: Indoor cables –
Detail specification for multi-fibre cables for use
in MPO connector terminated cable assemblies

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
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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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 60794-2-23 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical
committee 86: Fibre optics. It is an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
86A/2392/FDIS 86A/2412/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
– 4 – IEC 60794-2-23:2024 © IEC 2024
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all the parts in the IEC 60794 series, published under the general title Optical fibre
cables, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
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.

OPTICAL FIBRE CABLES –
Part 2-23: Indoor cables –
Detail specification for multi-fibre cables for use
in MPO connector terminated cable assemblies

1 Scope
This part of IEC 60794 is a detail specification and specifies indoor multi-fibre cables for use in
MPO (multi-fibre push on) connector terminated cable assemblies.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60793-1-20, Optical fibres – Part 1-20: Measurement methods and test procedures – Fibre
geometry
IEC 60793-1-21, Optical fibres – Part 1-21: Measurement methods and test procedures –
Coating geometry
IEC 60793-1-40, Optical fibres – Part 1-40: Attenuation measurement methods
IEC 60793-1-46, Optical fibres – Part 1-46: Measurement methods and test procedures –
Monitoring of changes in optical transmittance
IEC 60793-2-10, Optical fibres – Part 2-10: Product specifications – Sectional specification for
category A1 multimode fibres
IEC 60793-2-50, Optical fibres – Part 2-50: Product specifications – Sectional specification for
class B single-mode fibres
IEC 60794-1-1, Optical fibre cables – Part 1-1: Generic specification – General
IEC 60794-1-2, Optical fibre cables – Part 1-2: Generic specification – Basic optical cable test
procedures – General guidance
IEC 60794-1-21, Optical fibre cables – Part 1-21: Generic specification – Basic optical cable
test procedures – Mechanical tests methods
IEC 60794-1-22, Optical fibre cables – Part 1-22: Generic specification – Basic optical cable
test procedures – Environmental test methods
IEC 60794-1-31, Optical fibre cables – Part 1-31: Generic specification – Optical cable elements
– Optical fibre ribbon
IEC 60794-1-211, Optical fibre cables – Part 1-211: Generic specification – Basic optical cable
test procedures – Environmental test methods – Sheath shrinkage, method F11

– 6 – IEC 60794-2-23:2024 © IEC 2024
IEC 60794-2, Optical fibre cables – Part 2: Indoor cables – Sectional specification
IEC 60794-2-20, Optical fibre cables – Part 2-20: Indoor cables – Family specification for multi-
fibre optical cables
IEC 60811-202, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 202: General tests – Measurement of thickness of non-metallic sheath
IEC 60811-203, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 203: General tests – Measurement of overall dimensions
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60794-1-1 and the
following apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
cable for trunk cabling
cable to be used as part of the backbone routing in a cabling system
Note 1 to entry: Cables for trunk cabling normally forms cable assemblies that are tens or hundreds of meters
length. The cable assemblies are installed in ladder racks, conduit or under raised floors.
3.2
cable for cords
cable to be cut into small lengths and used in cords
Note 1 to entry: The cords are normally installed inside a housing/frame or between nearby housings/frames as
patch cords or jumpers and is used to create cross-connects or inter-connects within a cabling system.
4 Construction
4.1 General
In addition to the constructional requirements in IEC 60794-2 and IEC 60794-2-20, the following
considerations apply to multi-fibre optical cables for use in MPO connector terminated cable
assemblies.
It is not the intention of this document to specify the finished terminated cable assembly
complete with terminations.
There shall be no fibre splice in any delivery length unless otherwise agreed by the customer
and the supplier.
It shall be possible to identify each individual fibre throughout the length of the cable.

4.2 Optical fibres
Multimode or single-mode optical fibres shall meet the requirements of IEC 60793-2-10
sub-categories A1-OM1 or A1-OM2 to A1-OM5, or IEC 60793-2-50 class B.
NOTE The linear coefficient of optical fibre attenuation and attenuation point discontinuity might be affected by the
cable manufacturing process. Maximum values for these optical characteristics can be agreed between the customer
and the supplier.
4.3 Ribbon structure
If the fibres are in ribbon structure, the ribbon structure shall be in accordance with
IEC 60794‑1‑31.
4.4 Strength and anti-buckling members
The cable shall be designed with enough strength members to meet installation and service
conditions so that the fibres are not subjected to strain in excess of the limits agreed between
the customer and the supplier.
The strength and/or anti-buckling members may be either metallic or non-metallic and may be
located in the cable core and/or under the sheath and/or in the sheath.
4.5 Ripcord
If required, a ripcord may be provided beneath the cable sheath. The functionality of the ripcord
shall be tested according to IEC 60794-1-21, method E25.
4.6 Cable sheath
The cable shall have an overall protective sheath. The outer dimensions, sheath thickness of
the cable and tolerance values shall be specified in relevant specification.
4.7 Sheath marking
If required, the cable shall be marked as agreed between the customer and the supplier.
4.8 Example of cable construction
Examples of cable constructions are shown in Annex B. Other configurations are not precluded
if they meet the mechanical, environmental and transmission requirements given in this
document.
5 Tests
5.1 General
Compliance with the specification requirements shall be verified by carrying out tests selected
from 5.2 to 5.4. It is not intended that all tests be carried out in all cases. The tests to be applied
and the frequency of testing need to be agreed between the customer and the supplier.
As a general requirement for the tests specified in this document, unless otherwise specified,
the spirit is to keep "no change in attenuation" criteria at the end of each evaluation, although
the parameters specified in this document may be affected by measurement uncertainty arising
either from measurement errors or calibration errors. The optical total uncertainty of
measurement for this document shall be ±0,05 dB for single-mode fibres and ±0,2 dB for
multi-mode fibres. Any measured value within this range shall be considered as "no change in
attenuation".
– 8 – IEC 60794-2-23:2024 © IEC 2024
Single-mode fibre cables are measured at 1 550 nm or 1 625 nm and the measuring wavelength
shall be agreed between the customer and supplier. Multimode fibre cables are measured at
850 nm or 1 300 nm and the measuring wavelength shall be agreed between the customer and
supplier. Measurements of attenuation shall be carried out according to IEC 60793-1-40.
Measurements of changes in attenuation shall be carried out according to IEC 60793-1-46.
NOTE The optimized wavelength for multimode fibres A1-OM3 and A1-OM4 is 850 nm and for A1-OM5 fibre, the
targeted operational wavelength range is in the vicinity of 850 nm to 950 nm.
If cable loops are used within a test to fix the ends of a cable, the loop diameter shall be equal
or greater than the specified minimum cable bend diameter to avoid cable damage and
excessive mode filtering in multi-mode fibre.
Unless otherwise specified, all tests shall be carried out at expanded test conditions, as
described in IEC 60794-1-2.
The following tests can be performed on a short sample length of cable which is still a part of a
longer length. Thus, it becomes possible to detect permanent changes in attenuation. The
measuring wavelength and maximum value of the attenuation change for longer lengths shall
be agreed between the customer and the supplier.
5.2 Dimensions
The fibre dimensions and tolerances shall be verified in accordance with IEC 60793-1-20 or
IEC 60793-1-21. The outer dimensions of the cable, as well as the thickness of the sheath, shall
be measured in accordance with the methods of IEC 60811-202 and IEC 60811-203.
5.3 Mechanical requirements
5.3.1 General
The mechanical requirements are often different for cable for trunk cabling and cable for cords
in most of the tests.
5.3.2 Tensile performance
Method: IEC 60794-1-21, E1
Diameter of chuck drums and not less than the minimum loaded bending diameter
transfer devices: specified for the cable, at least 250 mm diameter.
Rate of transfer device: either 100 mm/min or 100 N/min
Load and duration: cable for trunk cabling: 400 N or the force exerted from
mass of 1 km cable (with g = 9,8 N/kg), whichever is
greater, applied for a minimum period of 10 min
cable for cords: 100 N, applied for a minimum period of
10 min
Length of sample: sufficient to achieve the desired accuracy of measurement
of attenuation change and shall be agreed between the
customer and the supplier
Requirements: there shall be no change in attenuation after the test;
fibre strain shall not exceed 60 % of the proof test of the
all-glass fibre while under test load;
there shall be no visible damage to the cable elements.

5.3.3 Crush
Method: IEC 60794-1-21, E3A
Short-term force and duration: 500 N, 1 min
Long-term force and duration: cable for trunk cabling: 300 N applied for 10 min
cable for cords: 200 N applied for 10 min
no change in attenuation during the long-term force and no
Requirements:
change in attenuation after the short-term force test. There
shall be no visible damage to the cable elements. Any
flattening of cable elements is not considered as damage.

5.3.4 Impact
Method: IEC 60794-1-21, E4
Radius of striking surface: 300 mm, minimum
Impact energy: 0,5 J for cables with diameter ≤ 2,0 mm;
1,0 J for cables with diameter > 2,0 mm
Number of impacts: 3, each one impact per location
Length between test locations: 500 mm
Requirements: no change in attenuation after the test. There shall be no
visible damage to the cable elements. Any flattening of
cable elements is not considered as damage.

5.3.5 Bending
Method: IEC 60794-1-21, E11A
Mandrel diameter: 20 times cable diameter, but not less than 60 mm
Number of turns: 6
Number of cycles: 10
Cable sample: See Annex A for details
Prior to bending: at both ends of the sample, elements of the cable shall be
fixed together, e.g. with clamps or glue. See Annex A.
Bend location: the section in the middle of the cable length shall be bent.
Requirements for cabled single- maximum attenuation change during the test ≤ 0,20 dB.
mode fibres: No change in attenuation after the test
Requirements for cabled multi- maximum attenuation change during the test ≤ 0,4 dB. No
mode fibres: change in attenuation after the test
Requirements for cable: there shall be no damage to the cable elements. Any
flattening of cable elements is not considered as damage.

– 10 – IEC 60794-2-23:2024 © IEC 2024
5.3.6 Repeated bending
Method: IEC 60794-1-21, E6
Bending radius:  20 times cable diameter, but not less than 30 mm
Number of cycles: 200
Mass of weights:  cable for trunk cabling: sufficient to contour the apparatus,
e.g. 40 N
cable for cords: sufficient to contour the apparatus, e.g.
10 N to 20 N
Requirements: no change in attenuation after the test and there shall be
no damage to the cable elements. Any flattening of cable
elements is not considered as damage.

5.3.7 Torsion
Method: IEC 60794-1-21, E7
Number of cycles: 10
Distance between fixed and cable for trunk cabling or cords: 125 times cable diameter
rotation clamp: but not less than 0,3 m and not greater than 2,0 m
Tension load: cable for trunk cabling: sufficient to keep the sample
straight, e.g., 40 N
cable for cords: sufficient to keep the sample straight, e.g.
10 N to 20 N.
Requirements for cabled single- maximum attenuation change during the test ≤ 0,20 dB,
mode fibres: No change in attenuation after the test
Requirements for cabled multi- maximum attenuation change during the test ≤ 0,4 dB, No
mode fibres: change in attenuation after the test.
Requirements for cable: there shall be no damage to the cable elements.

5.3.8 Kink
Method: IEC 60794-1-21, E10
Minimum loop diameter: for cables outer diameter ≤ 3,0 mm, to be 15 mm.
for cables outer diameter > 3,0 mm, to be 5 times the
cable diameter
Requirements: no kink shall occur

5.3.9 Abrasion resistance of cable marking
Method: IEC 60794-1-21, E2B, method 2
Number of cycles: 50
the marking shall be legible on completion of the test, after
Requirements:
the number of specified cycles.

5.4 Environmental requirements
5.4.1 Temperature cycling
Method: IEC 60794-1-22, F12
Temperatures: Temperatures shall be in accordance with Table 1.
Soak time: 1 h
Number of cycles: 5
Table 1 – Preferred low and high temperatures
Low High
Sources of temperatures (informative) Remark
temperature temperature
Performance
Environmental
categories of
T T
A B
classification of
connectors,
customer premises
°C °C components and
b
cabling
a
protective housings
M I C E
−10 +60 C Recommended
x x 1 x
HD
−10 +70 -
C
M I C E
−25 +70 OP
x x 2 x
HD
−25 +85 -
OP
A suitable operating service environment (performance category) or environmental classification should be
selected according to the application. A complete list of operating service environments can be found in
IEC 60794-1-1.
a
Included in IEC 61753-1. The abbreviations represent:
C: indoor controlled environment;
OP: outdoor protected environment;
HD
: extended upper temperature necessary due to additional dissipation by active electronics.
b
Included in ISO/IEC 11801-1. For an introduction to the MICE environmental classification system, use
ISO/IEC TR 29106. The abbreviation MICE represents: mechanical, ingress, climatic, electromagnetic.

Cable sample: See Annex A for details
Prior to temperature cycling: at both ends of the sample, elements of the cable shall be
fixed together, e.g. with clamps or glue. See Annex A.
Requirements: the maximum change in attenuation during the test shall
be specified in the relevant specification;
there shall be no change in attenuation after the test; other
attenuation requirements may be agreed between the
customer and the supplier.
– 12 – IEC 60794-2-23:2024 © IEC 2024
5.4.2 Sheath shrinkage
Method: IEC 60794-1-211, F11A
Low and high temperature: One pair should be selected in Table 1 according to the
application
Nominal length of samples: 1 m
Soak time t : 1 h
Number of cycles: 5
Requirement: The maximum sheath shrinkage shall be equal or less
than 20 mm
NOTE IEC TR 62959 provides information on cable shrinkage characterisation of optical fibre cables that consist
of standard glass optical fibres for telecommunication applications. The characterisation is directed to the effects of
cable shrinkage or cable element shrinkage on the termination of cables.
6 Transmission requirements
The transmission requirements shall be in accordance with IEC 60793-2-10 or IEC 60793-2-50
and shall be agreed between the customer and the supplier. The maximum cable attenuation
shall comply with IEC 60794-1-1.
7 Fire performance
All cables according to this document shall pass fire performance specifications. The
requirements may differ in different regions (e.g. North America, EU). But they also can differ
from country to country.
NOTE 1 IEC TR 62222 provides guidance and recommendations for the requirements and test methods for the fire
performance of communication cables when installed in buildings. The recommendations relate to typical applications
and installation practices, and an assessment of the fire hazards presented. Account is also taken of applicable
legislation and regulation.
IEC TR 62222 references several IEC fire performance test methods and also other test methods that can be required
by local or national legislation and regulation. It is important that the tests to be applied fulfil the national legislation
and regulation and the specific requirements for its intended use.
NOTE 2 Products placed on the EU or UK market would be determined whether EN 50575 is applicable after
checking with local regulations.

Annex A
(normative)
Cable sample preparation for bending and temperature cycling test
The cable sample shall be prepared as shown in Figure A.1. Elements of the cable shall be
fixed together at the illustrated positions, for example with clamps or glue. Fibres are fixed
together for the test.
Dimensions in metres
l
10,0
Key
1 primary coated optical fibres
2 element fixing location at cable end
3 cable sheath
NOTE Elements of the cable are fixed complying to their arrangements in the cable assembly.
Figure A.1 – Sample preparation and length for multi-fibre cables
for use in MPO connector terminated cable assemblies

– 14 – IEC 60794-2-23:2024 © IEC 2024
Annex B
(informative)
Examples of cable constructions
B.1 Optical cables for use in MPO connector terminated cable assemblies,
with single sheath
A cable design with a single, thin sheath, as shown in Figure B.1, offers a high fibre density.
Such cable types are best suitable for cords that are used within a fibre distribution
housing/frame or between nearby housings/frames.

Figure B.1 – Example of a cross-section of a 12-fibre cable with single sheath
B.2 Optical cables for use in MPO connector terminated cable assemblies,
with double sheath
A cable design with thicker sheath, for example with double sheath as shown in Figure B.2,
protects the fibres against higher mechanical load to the cable. Such cable types are best
suitable for trunk cabling.
Figure B.2 – Example of a cross-section of a 12-fibre cable with double sheath

Bibliography
IEC 61753-1, Fibre optic interconnecting devices and passive components – Performance
standard – Part 1: General and guidance
IEC TR 62222, Fire performance of communication cables installed in buildings
IEC TR 62959, Optical fibre cables – Shrinkage effects on cable and cable element end
termination – Guidance
ISO/IEC 11801-1, Information technology – Generic cabling for customer premises – Part 1:
General requirements
ISO/IEC TR 29106, Information technology – Generic cabling – Introduction to the MICE
environmental classification
EN 50575, Power, control and communication cables – Cables for general applications in
construction works subject to reaction to fire requirements

___________
– 16 – IEC 60794-2-23:2024 © IEC 2024
SOMMAIRE
AVANT-PROPOS . 17
1 Domaine d'application . 19
2 Références normatives . 19
3 Termes et définitions . 20
4 Construction . 20
4.1 Généralités . 20
4.2 Fibres optiques . 21
4.3 Structure en ruban . 21
4.4 Éléments de renfort et d’antidéformation . 21
4.5 Filin de déchirement . 21
4.6 Gaine de câble . 21
4.7 Marquage de la gaine . 21
4.8 Exemples de constructions de câbles . 21
5 Essais . 21
5.1 Généralités . 21
5.2 Dimensions . 22
5.3 Exigences mécaniques . 22
5.3.1 Généralités . 22
5.3.2 Performances en traction . 23
5.3.3 Écrasement . 23
5.3.4 Chocs . 24
5.3.5 Courbures. 24
5.3.6 Courbures répétées . 25
5.3.7 Torsion . 25
5.3.8 Pliure . 25
5.3.9 Résistance à l'abrasion du marquage du câble . 26
5.4 Exigences environnementales . 26
5.4.1 Cycles de température . 26
5.4.2 Rétraction de la gaine . 27
6 Exigences de transmission . 27
7 Comportement au feu . 27
Annexe A (normative) Préparation d’échantillons de câble pour les essais de courbure
et de cycles de température . 28
Annexe B (informative) Exemples de constructions de câbles . 29
B.1 Câbles optiques utilisés dans les câbles assemblés à une seule gaine,
équipés de connecteurs MPO . 29
B.2 Câbles optiques utilisés dans les câbles assemblés à double gaine, équipés
de connecteurs MPO . 29
Bibliographie . 30

Figure A.1 – Préparation et longueur des échantillons pour les câbles multifibres
utilisés dans les câbles assemblés équipés de connecteurs MPO . 28
Figure B.1 – Exemple de section d’un câble à 12 fibres avec une seule gaine . 29
Figure B.2 – Exemple de section d’un câble à 12 fibres avec une double gaine . 29

Tableau 1 – Températures basse et haute préférentielles . 26

COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
CABLES À FIBRES OPTIQUES –
Partie 2-23: Câbles intérieurs –
Spécification particulière pour les câbles multifibres utilisés
dans les câbles assemblés équipés de connecteurs MPO

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...