Single mode optical cable (duct/direct buried installation)

This document sets forth telecom operators', other service providers' and manufacturers' view of proposed technical requirements and characteristics of single mode optical fibres and cables for duct and direct buried installation.
This specification includes proposed functional mechanical, environmental and optical requirements, recommended features, and test methods for assessing the product against the stated requirements.
The specified test methods where applicable, are those referenced in EN 60794-1-1 "Optical fibre cables – Part 1-1: Generic specification – General" and described in detail in EN 60794-1-2 "Optical fibre cables – Part 1-2: Generic specification – Basic optical cable test procedures".
The requirements of this specification shall be used in conjunction with EN 60794-3 "Optical fibre cables - Part 3: Duct, buried and aerial cables - Sectional specification" and EN 60794-3-10 "Optical fibre cables – Part 3-10: External cables – Duct and directly buried optical telecommunication cables – Family specification".
Multimode fibre requirements are not addressed in this document.

Einmoden-Lichtwellenleiterkabel für Röhren- und direkte Erdverlegung

Câbles à fibres optiques unimodales (installations en conduite/ directement enterrées)

Eno-rodni optični kabel (cevna/neposredno zakopana vgradnja)*

General Information

Status
Withdrawn
Publication Date
31-Aug-2004
Withdrawal Date
16-Nov-2021
Technical Committee
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
17-Nov-2021
Due Date
10-Dec-2021
Completion Date
17-Nov-2021

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SLOVENSKI SIST EN 187105:2004

STANDARD
september 2004
Eno-rodni optični kabel (cevna/neposredno zakopana vgradnja)*
Single mode optical cable (duct/direct buried installation)
ICS 33.180.10 Referenčna številka
SIST EN 187105:2004(en)
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

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EUROPEAN STANDARD EN 187105
NORME EUROPÉENNE
EUROPÄISCHE NORM May 2002
ICS 33.180.10
English version
Single mode optical cable
(duct/direct buried installation)
Câbles à fibres optiques unimodales Einmoden-Lichtwellenleiterkabel für
(installations en conduite/ directement Röhren- und direkte Erdverlegung
enterrées)
This European Standard was approved by CENELEC on 2001-12-04. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any
other language made by translation under the responsibility of a CENELEC member into its own
language and notified to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands,
Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 187105:2002 E

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EN 187105:2002 – 2 –
Foreword
This European Standard was prepared by the Technical Committee CENELEC TC 86A, Optical fibres and
optical fibre cables.
The text of the draft was submitted to the formal vote and was approved by CENELEC as
EN 187105 on 2001-12-04.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2002-12-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2004-12-01
__________
Contents
Clause Page
1 Scope .4
2 Normative references.4
3 Terminology.5
4 General information .6
4.1 General cable description.6
4.1.1 Characteristics of optical fibre .6
4.1.2 Characteristics of optical fibre cable elements.6
4.1.3 Characteristics of optical fibre cables .6
4.1.4 Environmental and product safety requirements.7
4.1.5 Informative note: Upgrading to meet future network requirements.7
4.2 Optical fibre spliceability .7
4.3 Testing.7
5 Requirements for cabled single mode optical fibres.7
5.1 Fibre materials.7
5.2 Optical requirements.8
5.2.1 Attenuation coefficient.8
5.2.2 Point discontinuities .8
5.2.3 Chromatic dispersion.8
5.2.4 Cut-off wavelength.8
5.2.5 Mode field diameter .9
5.2.6 Macrobending sensitivity .9
5.2.7 Polarisation mode dispersion (PMD).9
5.2.8 Refractive group index .9
5.3 Geometrical requirements.10
5.3.1 Mode field concentricity error .10
5.3.2 Primary coating non circularity .10
5.3.3 Cladding/primary coating concentricity error.10
5.4 Mechanical requirements .10
5.4.1 Fibre proof test.10
5.4.2 Coating strip force.10
5.4.3 Stress corrosion susceptibility.10

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– 3 – EN 187105:2002
6 Requirements for cable elements.10
6.1 Element design .10
6.1.1 Modularity .11
6.1.2 Fibre and elements identification.11
6.2 Element characteristics.11
6.2.1 Ribbon .11
6.2.2 Tube kinking.12
7 Requirements for optical cables .12
7.1 Cable construction .12
7.1.1 Cable core.12
7.1.2 Anti-buckling and strength elements splicing .12
7.1.3 Cable element stranding.12
7.1.4 Spliced fibres .12
7.1.5 Spare fibres.12
7.1.6 Cable sheath removal .13
7.1.7 Armouring .13
7.2 Cable marking.13
7.2.1 Cable marking.13
7.2.2 Identification marking.13
7.2.3 Cable length marking (if required) .13
7.3 Cable materials.13
7.3.1 Tube filling compound material .13
7.3.2 Water-blocking material .13
7.3.3 Filling and water-blocking material flow.13
7.3.4 Cable material compatibility .14
7.4 Cable sheath.14
7.4.1 Sheath material.14
7.4.2 Sheath thickness.14
7.4.3 Outer cable diameter.14
7.4.4 Moisture barrier.14
7.5 Mechanical requirements .14
7.5.1 Cable bend.14
7.5.2 Cable impact.15
7.5.3 Cable crush.15
7.5.4 Cable tensile performance.15
7.5.5 Cable torsion.16
7.5.6 Cable repeated bending .16
7.6 Environmental requirements .16
7.6.1 Temperature cycling.16
7.6.2 Stripping force stability of cabled optical fibres.17
7.6.3 Water penetration .17
7.6.4 Hydrogen in cables.17
7.6.5 Environmental impact .17
7.7 Electrical protection.17
7.7.1 Continuity of metallic members.17
7.7.2 Lightning damage susceptibility.17
8 Product qualification requirements .18
8.1 General.18
8.2 Definitions.18
8.3 Optical fibre qualification.18
8.4 Cable qualification .18
8.4.1 Cable element qualification .18
8.4.2 Optical fibre cable qualification .19

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EN 187105:2002 – 4 –
1 Scope
This document sets forth telecom operators', other service providers' and manufacturers' view of
proposed technical requirements and characteristics of single mode optical fibres and cables for duct and
direct buried installation.
This specification includes proposed functional mechanical, environmental and optical requirements,
recommended features, and test methods for assessing the product against the stated requirements.
The specified test methods where applicable, are those referenced in EN 60794-1-1 "Optical fibre cables
– Part 1-1: Generic specification – General" and described in detail in EN 60794-1-2 "Optical fibre cables
– Part 1-2: Generic specification – Basic optical cable test procedures".
The requirements of this specification shall be used in conjunction with EN 60794-3 "Optical fibre cables
- Part 3: Duct, buried and aerial cables - Sectional specification" and EN 60794-3-10 "Optical fibre cables
– Part 3-10: External cables – Duct and directly buried optical telecommunication cables – Family
specification".
Multimode fibre requirements are not addressed in this document.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute
provisions of this standard. For dated references, subsequent amendments to, or revisions of, any of
these publications do not apply. However, parties to agreements based on this standard are encouraged
to investigate the possibility of applying the most recent editions of the normative documents indicated
below. For undated references, the latest edition of the normative document referred to applies.
EN 50290-2-24 2002 Communication cables - Part 2-24: Common design rules and construction
- PE sheathing
EN 50290-2-28 2002 Communication cables - Part 2-28: Common design rules and construction
- Filling compounds for filled cables
1)
EN 50290-3 Communication cables – Part 3: Quality assessment
EN 60793-1-30 2002 Optical fibres - Part 1-30: Measurement methods and test procedures –
Fibre proof (IEC 60793-1-30)
2)
EN 60793-1-32 Optical fibres - Part 1-32: Measurement methods and test procedures –
Coating strippability (IEC 60793-1-32)
EN 60793-1-33 2002 Optical fibres - Part 1-33: Measurement methods and test procedures –
Stress corrosion susceptibility (IEC 60793-1-33)
2)
EN 60793-1-40 Optical fibres - Part 1-40: Measurement methods and test procedures –
Attenuation (IEC 60793-1-40)
EN 60793-1-42 2002 Optical fibres - Part 1-42: Measurement methods and test procedures –
Chromatic dispersion (IEC 60793-1-42)
EN 60793-1-44 2002 Optical fibres - Part 1-44: Measurement methods and test procedures –
Cut-off wavelength (IEC 60793-1-44)
2)
EN 60793-1-45 Optical fibres - Part 1-45: Measurement methods and test procedures –
Mode field diameter (IEC 60793-1-45)
EN 60793-1-47 2002 Optical fibres - Part 1-47: Measurement methods and test procedures –
Macrobending loss attenuation (IEC 60793-1-47)

1)
At draft stage.
2)
Awaiting publication pending ratification of prAA.

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– 5 – EN 187105:2002
EN 60794-1-1 2002 Optical fibre cables - Part 1-1: Generic specification – General
(IEC 60794-1-1:2001)
EN 60794-1-2 1999 Optical fibre cables – Part 1-2: Generic specification – Basic optical cable
test procedures (IEC 60794-1-2:1999)
EN 60794-3 2002 Optical fibre cables – Part 3: Duct, buried and aerial cables – Sectional
specification (IEC 60794-3:2001)
EN 60794-3-10 2002 Optical fibre cables – Part 3-10:– External cables – Duct and directly buried
optical telecommunication cables - Family specification (IEC 60794-3-10)
EN 60811-1-1 1995 Insulating and sheathing materials of electric cables – Common test
methods – Part 1: General application – Section 1: Measurement of
thickness and overall dimensions – Tests for determining the mechanical
properties (IEC 60811-1-1:1993)
EN 61663-1 1999 Lightning protection – Telecommunication lines – Part 1: Fibre optic
installations (IEC 61663-1:1999)
EN 188000 1992 Generic specification: Optical fibres
EN 188100 1995 Sectional specification: Single-mode (SM) optical fibre
EN 188101 1995 Family specification: Single-mode dispersion unshifted (B1.1) optical fibre
EN 188102 1995 Family specification: Single-mode dispersion shifted (B2) optical fibre
HD 402 S2 1984 Standard colours for insulation for low-frequency cables and wires
(IEC 60304:1982)
IEC 60708-1 1981 Low-frequency cables with polyolefin insulation and moisture barrier
polyolefin sheath – Part 1: General design details and requirements
IEC 60793-1-1 1995 Optical fibres –Part 1-1: Generic specification – General
IEC 60793-1-2 1995 Optical fibres – Part 1-2: Generic specification – Measuring methods for
dimensions
IEC 60793-1-4 1995 Optical fibres – Part 1-4: Generic specification - Measuring methods for
transmission and optical characteristics
IEC 60793-1-5 1995 Optical fibres – Part 1-5: Generic specification - Measuring methods for
environmental characteristics
IEC 60793-2 1998 Optical fibres – Part 2: Product specifications
IEC 61282-3 Guidelines for the calculation of PMD in fiber optic systems
IEC 61931 1998 Fibre optic – Terminology (Technical Report)
IEC 61941 2000 Optical fibres – Polarization mode dispersion measurement techniques for
single-mode optical fibres (Technical Specification)
3 Terminology
Unless otherwise specified the definitions are given in IEC 61931.

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EN 187105:2002 – 6 –
4 General information
Single mode optical fibres are widely used for communication purposes and cabled to satisfy the
functional requirements of the installation environment. For duct installation, the environment and
infrastructure can be varied and may also involve the use of single and multiple subducts. Directly buried
cables may be installed by a variety of methods such as ploughing, trenching and moling with different
environments and infrastructure. This may involve specific cable design solutions based on either light,
medium or heavy armouring. It is recognised that certain designs of cable for direct buried applications
involving light armour may also be suitable for duct installation. The functional requirements and test
methods featured in this specification are based upon adherence to established and recognised instal-
lation techniques such as those highlighted in the informative annex C (Guide to the installation of optical
fibre cable) of EN 60794-1-1.
4.1 General cable description
4.1.1 Characteristics of optical fibre
Single mode optical fibres are classified according to their operational wavelength and dispersion
characteristics. The fibres covered by this specification are categorised as type B and described in
IEC 60793-1-1. The predominant fibre types featured in this specification include, dispersion unshifted
(B1.1, B1.3), dispersion shifted (B2) and non-zero dispersion (B4). Unless otherwise specified,
requirements of applicable European single mode fibre standards (EN 188000, EN 188100, EN 188101
and EN 188102) have to be used in this standard.
Optical fibres are inherently robust and strong, but the strength can be drastically reduced due to the
combination of environmental conditions, unavoidable microscopic surface flaws introduced during fibre
manufacture and stresses imposed on the fibre during handling, cabling and installation. The strength
degradation can be as a result of dynamic or static fatigue as well as through ageing with no stress
component. Dynamic fatigue is more likely to occur during installation whilst static fatigue could occur
over the lifetime of the fibre arising from residual strain in the cable or within coiled fibre housed in a
splice enclosure or footway box. The attenuation of cabled fibre could also increase during its lifetime if
the fibre is not suitably protected from mechanical stresses and environmental hazards or if
inappropriate and incompatible materials are used in the cable construction.
The recommended cable design features, test parameters and requirements outlined in this specification
are designed to mitigate these risks and hazards for the optical fibres involved.
4.1.2 Characteristics of optical fibre cable elements
Optical fibre cable elements such as loose buffer tubes, slotted core, fibre ribbons, fibre bundles and
central/core tubes shall be suitably designed to provide adequate means of fibre location, identification,
modularity, protection during cable manufacture, installation and termination. The structure of these
elements and the materials used in their manufacture shall not have any long term detrimental effects on
fibre performance during the service life of the cable, splice enclosure and/ or cabinet. To satisfy these
functional requirements, the different elements shall comply with the requirements of clause 5 in
EN 60794-3 as well as those outlined in clause 4 of this standard.
4.1.3 Characteristics of optical fibre cables
Optical fibre cable for duct and direct buried applications shall be designed, manufactured and installed
to ensure stable and consistent fibre performance for a predicted operating lifetime of at least 20 years
under the prevailing environmental conditions. The required levels of protection for the fibre can be
achieved by laying up or assembling the cable elements in association with suitable strength and/or anti
buckling members. These can be either metallic in nature or non-metallic and positioned at the centre of
the cable core or as peripheral members in or underneath the outer cable sheath. Protection from water
and moisture ingress can be achieved by the inclusion of moisture barrier tapes, either metallic or non
metallic, and water blocking or swellable materials.

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– 7 – EN 187105:2002
4.1.4 Environmental and product safety requirements
IEC Guide 104 should be taken into account as far as possible. The materials of the cables in contact
with the environment shall not be hazardous to environment and personnel.
4.1.5 Informative note: Upgrading to meet future network requirements
Single mode optical fibre transmission continues to offer the potential for ever increasing speed and
information transmission capacity. This specification has been prepared with these future developments
and upgrades in mind, such that some of the requirements outlined for fibre and cable may not be
necessary for all applications but may prove to be essential for future uses.
4.2 Optical fibre spliceability
All of the single mode fibre types covered in this specification can readily achieve very low splice loss
levels using a range of commercially available techniques.
4.3 Testing
For all test procedures, the test conditions shall be the standard atmospheric conditions (23 °C ± 5 °C,
and 20 % - 70 % relative humidity), unless otherwise specified. All measured and computed values are
to be rounded to the number of decimal places given in the corresponding requirement or objective.
The parameters specified in this standard may be affected by measurement uncertainty arising either
from measurement errors or calibration errors due to a lack of suitable standards. Acceptance criteria
shall be interpreted with respect to this consideration. The total uncertainty of measurement for this
standard shall be less than or equal to 0,05 dB for attenuation. The expression of ”no change in
attenuation” means that any change in measurement value, either positive or negative, within the
uncertainty of measurement shall be ignored.
Some of the mechanical and environmental tests in 5.5 and 5.6 can be performed on a short sample
length of cable which is still an integral part of a longer length. Thus it becomes possible to detect
permanent changes in attenuation.
5 Requirements for cabled single mode optical fibres
5.1 Fibre materials
The materials used in the manufacture of single mode optical fibres for incorporation into cables to this
specification, shall be of a uniform quality. The core and cladding regions of the fibre shall be made from
predominantly purified silica (SiO ) with a defined and closely controlled refraction index difference. The
2
refraction index of either the core and/or the cladding shall be controlled by the inclusion of small
amounts of highly purified dopant materials.
The glass surface shall be protected with one or more layers of suitable inert coating material, such as
UV cured acrylates. The coating shall be in intimate contact with the cladding surface and satisfy the
requirements of 3.4.2 (coating strip force) to facilitate removal for connecting and splicing purposes
without damage to the fibre and to avoid delamination which may expose the glass surface to the
environment. The coating surface shall only be cleaned (e.g from cable filling compounds) with cleaning
agents recommended by the fibre manufacturer. In all circumstances the use of chlorine-based cleaning
agents shall be prohibited because of its health hazard.

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EN 187105:2002 – 8 –
5.2 Optical requirements
5.2.1 Attenuation coefficient
The cable attenuation coefficient requirements where applicable, for type B1.1, B1.3, B2 and B4 single
mode fibres covered by this specification shall meet EN 60794-3-10 and shall be specified in the
following windows:
1 285 - 1 330 nm
1 530 - 1 570 nm
1 570 - 1 625 nm
NOTE  Fibre types B2 and B4 only operate at the 1 550 nm window.
The specification shall be
at 1 310 nm: � 0,38 dB/km,
at 1 550 nm: � 0,25 dB/km for B1.1, B1.3 and B2 fibres,
� 0,27 dB/km for B4 fibres,
at 1 625 nm: under consideration in IEC.
Test procedure:
Measurements shall be made in accordance with EN 60793-1-40.
5.2.2 Point discontinuities
Point discontinuities / local variations representing non-reflective events shall be: � 0,10 dB.
Extended variations for fibre lengths in excess of 1 km shall be: � 0,10 dB/km.
Test procedure:
Measurements shall be made in accordance with EN 60793-1-40 method C (back scattering technique).
Measurement variables:
wavelength: 1 550 nm;
distance resolution (pulse width): � 1 �s.
5.2.3 Chromatic dispersion
Chromatic dispersion shall comply with IEC 60793-2.
NOTE  For information, the requirements given in IEC 60793-2 are as follows:
The zero dispersion wavelength �o shall be
1 300 nm � �o � 1 324 nm (dispersion unshifted fibres – type B1.1 and B1.3),
1 500 nm � �o � 1 600 nm (dispersion shifted fibres – type B2).
The maximum value of the zero dispersion slope coefficient So shall be
So � 0,093 ps / nm2.km (dispersion unshifted fibres – type B1.1 and B1.3),
So � 0,085 ps / nm2.km (dispersion shifted fibres – type B2),
So not specified for non-zero dispersion fibres – type B4.
Test procedure:
Chromatic dispersion measurements shall be made in accordance with EN 60793-1-42.
5.2.4 Cut-off wavelength
Cable cut-off wavelength shall be
� 1 260 nm for fibre types B1.1 and B1.3,
� 1 260 nm for fibre type B2,
� 1 480 nm for fibre type B4.

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– 9 – EN 187105:2002
Test procedure:
Cut-off wavelength measurements shall be made in accordance with EN 60793-1-44.
5.2.5 Mode field diameter
The mode field diameter requirements shall comply with IEC 60793-2.
NOTE  For information, the requirements given in IEC 60793-2 are as follows:
The nominal mode field diameter (2w) shall be
8,6 µm � 2w � 9,5 µm at 1 310 nm (dispersion unshifted fibres – type B1.1 and B1.3),
7,0 µm � 2w � 8,5 µm at 1 550 nm (dispersion shifted fibres – type B2).
A deviation from the chosen nominal value shall be < 10 %.
Values are under consideration for non-zero dispersion shifted fibres – type B4.
Test procedure:
The mode field diameter measurements shall be made in accordance with EN 60793-1-45.
5.2.6 Macrobending sensitivity
The macrobending attenuation per 100 turns of fibre on a mandrel, 60 mm in diameter shall not exceed
0,2 dB at 1 550 nm.
The fibre macrobend measurement is to be made in accordance with EN 60793-1-47.
NOTE  Care must be taken for fibre deployment to avoid multiple loops of bend radius < 30 mm, since attenuation may be increased and
fibre lifetime may be decreased due to the high induced bending stress.
5.2.7 Polarisation mode dispersion (P
...

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