EN 50411-3-8:2016
(Main)Fibre organizers and closures to be used in optical fibre communication systems - Product specifications - Part 3-8: Fibre management system, terminal equipment box type 1 for category C
General Information
- Abstract
1.1 Product definition This European Standard specifies the dimensional, optical, mechanical and environmental performance requirements of a Terminal Equipment Boxes for the FTTX networks. The Terminal Equipment Box will house the ONT/CPE (electronics) and it protects the optical fibres, splices and connectors from direct contact with the user. Optionally it can contain the network test interface, the power supply and the batteries. The performance of the electronics, power supply or batteries are not part of this document. These are covered by another EN document, EN 50700. This specification contains the initial, start of life optical, mechanical and environmental performance requirements of the optical fibre termination in a Terminal Equipment Box, in order for it to be categorized as an EN standard product. 1.2 Operating environment The tests selected combined with the severity and duration is representative of indoor and outside plant for above ground environments defined by: EN 61753-1 Category C Controlled environment 1.3 Reliability Whilst the anticipated service life expectancy of the product in this environment is 20 years, compliance with this specification does not guarantee the reliability of the product. This should be predicted using a recognised reliability assessment programme. 1.4 Quality assurance Compliance with this specification does not guarantee the manufacturing consistency of the product. This should be maintained using a recognised quality assurance programme. 1.5 Allowed fibre and cable types All EN 60793-2-50 fibres can be stored in the Terminal Equipment Box with a minimum storage radius of 20 mm (up to a length of maximum 2 m). Smaller storage radii down to 15 mm are possible with the EN 60793-2-50 B6A fibre types, but in this case the reduction in mechanical reliability should be taken into account (see Annex A).
- Status
- Published
- Publication Date
- 07-Jan-2016
- Withdrawal Date
- 11-Oct-2018
- Current Stage
- 6060 - Document made available - Publishing
- Start Date
- 08-Jan-2016
- Due Date
- 07-Dec-2015
- Completion Date
- 08-Jan-2016
Overview
EN 50411-3-8:2016 is a CLC (CENELEC) European standard that defines product specifications for a Fibre Management System (FMS) - Terminal Equipment Box Type 1 intended for FTTX networks in EN 61753-1 Category C (controlled) environments. The standard sets dimensional, optical, mechanical and environmental start-of-life performance requirements for terminal equipment boxes that house the ONT/CPE and protect optical fibres, splices and connectors from user contact. It focuses on the enclosure and fibre management performance; electronic performance (ONT, power, batteries) is covered by EN 50700.
Key topics and technical requirements
- Product definition and scope: Wall-mounted terminal equipment boxes for indoor or above-ground outdoor use that provide fibre routing, storage and protection for splices, connectors and passive optical devices.
- Dimensional limits and variants: Maximum outline shapes and sizes are specified for different variants to ensure standardization and interoperability.
- Fibre storage and handling: Minimum storage radius 20 mm for EN 60793-2-50 fibres (up to 2 m of stored fibre). Reduced radius down to 15 mm is allowed for B6_a fibre types, with a note on reduced mechanical reliability (Annex A).
- Mechanical and environmental performance: Requirements and test sequences reference EN 61300 series (vibration, shock, impact, temperature change, assembly/disassembly), ingress protection (IP40), cable fixing (mechanical attachment), and material compatibility/resistance.
- Optical performance: Start-of-life attenuation, return loss, and transient loss criteria based on EN 61300 test methods (e.g., EN 61300-3-4, -3-28, -3-3).
- Safety and materials: Laser safety per EN 60825-2 and fire/smoke/halogen tests referenced (EN 60695-11-10, EN 61034-2, EN 60754-1). Materials must be solvent-resistant and compatible with cable/microduct materials.
- Quality & reliability guidance: Anticipated service life ~20 years, but compliance does not guarantee reliability or manufacturing consistency - these require recognized reliability and QA programs.
Applications and practical use
- Designed for FTTX deployments where the ONT/CPE is wall-mounted and fibres/splices must be protected and routed neatly.
- Used in residential and commercial premises, microduct connections and above-ground outdoor terminations in controlled environments.
- Provides an enclosure for optional network test interfaces (ENTI), power supply and batteries while isolating fibre terminations from users.
- Helps manufacturers and network operators ensure consistent mechanical/optical performance at product start-of-life and simplifies installation best practices.
Who should use this standard
- Manufacturers of terminal equipment boxes, fibre organizers and closures
- Product designers and engineers specifying FMS enclosures for FTTX
- Network planners, installation contractors and test laboratories
- Procurement teams and certification bodies evaluating compliance
Related standards (normative references)
- EN 60793-2-50 (optical fibres)
- EN 61753-1 (performance categories)
- EN 61300 series (test methods)
- EN 50377 (connectors)
- EN 50700 (ONT/CPE & power performance)
- EN 60529 (IP Code), EN 60825-2 (laser safety), EN 60695-11-10, EN 60754-1, EN 61034-2
Keywords: EN 50411-3-8:2016, Terminal Equipment Box, Fibre Management System, FTTX, ONT/CPE, fibre organizers, EN 60793-2-50, EN 61753-1, IP40.
Relations
- Effective Date
- 02-Jun-2026
- Effective Date
- 02-Jun-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
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Frequently Asked Questions
EN 50411-3-8:2016 is a standard published by CLC. Its full title is "Fibre organizers and closures to be used in optical fibre communication systems - Product specifications - Part 3-8: Fibre management system, terminal equipment box type 1 for category C". This standard covers: 1.1 Product definition This European Standard specifies the dimensional, optical, mechanical and environmental performance requirements of a Terminal Equipment Boxes for the FTTX networks. The Terminal Equipment Box will house the ONT/CPE (electronics) and it protects the optical fibres, splices and connectors from direct contact with the user. Optionally it can contain the network test interface, the power supply and the batteries. The performance of the electronics, power supply or batteries are not part of this document. These are covered by another EN document, EN 50700. This specification contains the initial, start of life optical, mechanical and environmental performance requirements of the optical fibre termination in a Terminal Equipment Box, in order for it to be categorized as an EN standard product. 1.2 Operating environment The tests selected combined with the severity and duration is representative of indoor and outside plant for above ground environments defined by: EN 61753-1 Category C Controlled environment 1.3 Reliability Whilst the anticipated service life expectancy of the product in this environment is 20 years, compliance with this specification does not guarantee the reliability of the product. This should be predicted using a recognised reliability assessment programme. 1.4 Quality assurance Compliance with this specification does not guarantee the manufacturing consistency of the product. This should be maintained using a recognised quality assurance programme. 1.5 Allowed fibre and cable types All EN 60793-2-50 fibres can be stored in the Terminal Equipment Box with a minimum storage radius of 20 mm (up to a length of maximum 2 m). Smaller storage radii down to 15 mm are possible with the EN 60793-2-50 B6A fibre types, but in this case the reduction in mechanical reliability should be taken into account (see Annex A).
1.1 Product definition This European Standard specifies the dimensional, optical, mechanical and environmental performance requirements of a Terminal Equipment Boxes for the FTTX networks. The Terminal Equipment Box will house the ONT/CPE (electronics) and it protects the optical fibres, splices and connectors from direct contact with the user. Optionally it can contain the network test interface, the power supply and the batteries. The performance of the electronics, power supply or batteries are not part of this document. These are covered by another EN document, EN 50700. This specification contains the initial, start of life optical, mechanical and environmental performance requirements of the optical fibre termination in a Terminal Equipment Box, in order for it to be categorized as an EN standard product. 1.2 Operating environment The tests selected combined with the severity and duration is representative of indoor and outside plant for above ground environments defined by: EN 61753-1 Category C Controlled environment 1.3 Reliability Whilst the anticipated service life expectancy of the product in this environment is 20 years, compliance with this specification does not guarantee the reliability of the product. This should be predicted using a recognised reliability assessment programme. 1.4 Quality assurance Compliance with this specification does not guarantee the manufacturing consistency of the product. This should be maintained using a recognised quality assurance programme. 1.5 Allowed fibre and cable types All EN 60793-2-50 fibres can be stored in the Terminal Equipment Box with a minimum storage radius of 20 mm (up to a length of maximum 2 m). Smaller storage radii down to 15 mm are possible with the EN 60793-2-50 B6A fibre types, but in this case the reduction in mechanical reliability should be taken into account (see Annex A).
EN 50411-3-8:2016 is classified under the following ICS (International Classification for Standards) categories: 33.180.20 - Fibre optic interconnecting devices; 33.180.99 - Other fibre optic equipment. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 50411-3-8:2016 has the following relationships with other standards: It is inter standard links to EN IEC 60825-2:2026, EN IEC 61300-2-33:2026, EN 60754-1:2014, EN 61300-3-1:2005, EN 60825-2:2004, EN IEC 61300-2-4:2019, EN 61034-2:2005, EN 60695-11-10:2013, EN IEC 61300-2-1:2023, EN 61300-3-28:2012, EN 50700:2023, EN 61300-2-33:2012, EN 61300-2-9:2017, EN 61300-3-3:2009, EN IEC 61300-3-4:2023. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 50411-3-8:2016 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-marec-2016
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Fibre organizers and closures to be used in optical fibre communication systems -
Product specifications - Part 3-8: Fibre management system, terminal equipment box
type 1 for category C
LWL-Spleißkassetten und -Muffen für die Anwendung in LWL-Kommunikationssystemen
- Produktspezifikationen - Teil 3-8: Faser Management System, Kasten für
Endeinrichtungen Typ 1 für Kategorie C
Organiseurs et boîtiers de fibres destinés à être utilisés dans les systèmes de
communication par fibres optiques - Spécifications de produits - Partie 3-8: Système de
gestion des fibres, boîtier d'équipement terminal de type 1 pour la catégorie C
Ta slovenski standard je istoveten z: EN 50411-3-8:2016
ICS:
33.180.20 3RYH]RYDOQHQDSUDYH]D Fibre optic interconnecting
RSWLþQDYODNQD devices
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN 50411-3-8
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2016
ICS 33.180.20; 33.180.99
English Version
Fibre organizers and closures to be used in optical fibre
communication systems - Product specifications - Part 3-8: Fibre
management system, terminal equipment box type 1 for
category C
Organiseurs et boîtiers de fibres destinés à être utilisés LWL-Spleißkassetten und -Muffen für die Anwendung in
dans les systèmes de communication par fibres optiques - LWL-Kommunikationssystemen - Produktspezifikationen -
Spécifications de produits - Partie 3-8: Système de gestion Teil 3-8: Faser Management System, Kasten für
des fibres, boîtier d'équipement terminal de type 1 pour la Endeinrichtungen Typ 1 für Kategorie C
catégorie C
This European Standard was approved by CENELEC on 2015-10-12. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50411-3-8:2016 E
Contents Page
European foreword . 3
1 Scope . 5
1.1 Product definition . 5
1.2 Operating environment . 5
1.3 Reliability 5
1.4 Quality assurance . 5
1.5 Allowed fibre types . 5
2 Normative references . 5
3 Terms, definitions and abbreviations . 7
3.1 Terms and definitions . 7
3.2 Abbreviations . 7
4 Description . 7
4.1 Optical fibre terminal equipment box housing . 7
4.2 Cable fixing . 8
4.3 FMS system . 8
4.4 Materials 8
4.5 Laser safety . 9
4.6 Marking and identification . 9
5 Variants . 9
6 Dimensional requirements . 11
7 Tests . 11
7.1 Test sample size . 11
7.2 Test sample preparation . 11
7.3 Test and measurement methods. 12
7.4 Test sequence . 12
7.5 Pass/fail criteria . 12
8 Test report . 13
9 Performance requirements . 13
9.1 Dimensional and marking requirements . 13
9.2 Ingress, optical and appearance performance criteria . 14
9.3 Mechanical ingress performance requirements . 15
9.4 Environmental ingress performance requirements . 16
9.5 Mechanical optical performance requirements . 17
9.6 Environmental optical performance requirements . 18
9.7 Material performance requirements . 18
Annex A (informative) Fibre for test sample details . 19
Annex B (normative) Sample size and product sourcing requirements . 20
Annex C (informative) Performance of copper cabling and connectivity . 21
Bibliography . 22
European foreword
This document (EN 50411-3-8:2016) has been prepared by CLC/TC 86BXA "Fibre optic
interconnect, passive and connectorised components".
The following dates are fixed:
latest date by which this document has to (dop) 2016-10-12
be implemented at national level by
publication of an identical national
standard or by endorsement
latest date by which the national standards (dow) 2018-10-12
conflicting with this
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the
subject of patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any
or all such patent rights.
Fibre organizers and closures to be used in optical fibre communication systems – Product specifications
Part 3-8: Fibre management system, terminal equipment box type 1 for category C
Description Performance
Construction: Wall mounted box Applications:
Cable Fixing: Mechanical
Optical Fibre Terminal Equipment Box including the
ONT/CPE for indoor controlled environments
Connectors: EN 50377 series
EN 61753-1 Category C
EN 60603-7 Series
Fibre types: EN 60793-2-50 B1 and B6
Sealing performance: IP 40
Fibre management: Integrated in box
Related documents:
EN 60529 Degrees of protection provided by enclosures (IP Code) (IEC 60529)
EN 60793-2-50 Optical fibres – Part 2-50: Product specifications – Sectional specification for class B
single-mode fibres (IEC 60793-2-50)
EN 61753-1 Fibre optic interconnecting devices and passive components – Part 1: General and
guidance for performance standard (IEC 61753-1)
EN 61300 series Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures (IEC 61300 series)
Maximum outline
Shape
dimensions
Width: 300 mm
Height
Height: 150 mm
Rectangular shape
Depth: 100 mm
Depth
Width
Width: 210 mm
Square shape Height: 210 mm
Depth: 50 mm
Diameter: 250 mm
Circular
Depth: 100 mm
Depth
Diameter
1 Scope
1.1 Product definition
This European Standard specifies the dimensional, optical, mechanical and environmental
performance requirements of a Terminal Equipment Boxes for the FTTX networks. The Terminal
Equipment Box will house the ONT/CPE (electronics) and it protects the optical fibres, splices
and connectors from direct contact with the user. Optionally it can contain the network test
interface, the power supply and the batteries.
The performance of the electronics, power supply or batteries are not part of this document.
These are covered by another EN document, EN 50700.
This specification contains the initial, start of life optical, mechanical and environmental
performance requirements of the optical fibre termination in a Terminal Equipment Box, in order
for it to be categorized as an EN standard product.
1.2 Operating environment
The tests selected combined with the severity and duration is representative of indoor and
outside plant for above ground environments defined by:
EN 61753-1 Category C Controlled environment
1.3 Reliability
Whilst the anticipated service life expectancy of the product in this environment is 20 years,
compliance with this specification does not guarantee the reliability of the product. This should be
predicted using a recognised reliability assessment programme.
1.4 Quality assurance
Compliance with this specification does not guarantee the manufacturing consistency of the
product. This should be maintained using a recognised quality assurance programme.
1.5 Allowed fibre types
All EN 60793-2-50 fibres can be stored in the Terminal Equipment Box with a minimum storage
radius of 20 mm (up to a length of maximum 2 m).
Smaller storage radii down to 15 mm are possible with the EN 60793-2-50 B6_a fibre types, but
in this case the reduction in mechanical reliability should be taken into account (see Annex A).
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 50377 (all parts), Connector sets and interconnect components to be used in optical fibre
communication systems — Product specifications
EN 50700, Information technology — Premises distribution access network (PDAN) cabling to
support deployment of optical broadband networks
EN 60529, Degrees of protection provided by enclosures (IP Code) (IEC 60529)
EN 60695-11-10, Fire hazard testing — Part 11-10: Test flames — 50 W horizontal and vertical
flame test methods (IEC 60695-11-10)
EN 60754-1, Test on gases evolved during combustion of materials from cables — Part 1:
Determination of the halogen acid gas content (IEC 60754-1)
EN 60793-2-50, Optical fibres — Part 2-50: Product specifications — Sectional specification for
class B single-mode fibres (IEC 60793-2-50)
EN 60825-2, Safety of laser products — Part 2: Safety of optical fibre communication systems
(OFCS) (IEC 60825-2)
EN 61034-2, Measurement of smoke density of cables burning under defined conditions —
Part 2: Test procedure and requirements (IEC 61034-2)
EN 61300-2-1, Fibre optic interconnecting devices and passive components — Basic test and
measurement procedures — Part 2-1: Tests — Vibration (sinusoidal) (IEC 61300-2-1)
EN 61300-2-4, Fibre optic interconnecting devices and passive components — Basic test and
measurement procedures — Part 2-4: Tests — Fibre/cable retention (IEC 61300-2-4)
EN 61300-2-9, Fibre optic interconnecting devices and passive components — Basic test and
measurement procedures — Part 2-0: Tests — Shock (IEC 61300-2-9)
EN 61300-2-12, Fibre optic interconnecting devices and passive components — Basic test and
measurement procedures — Part 2-12: Tests — Impact (IEC 61300-2-12)
EN 61300-2-22, Fibre optic interconnecting devices and passive components — Basic test and
measurement procedures — Part 2-22: Tests — Change of temperature (IEC 61300-2-22)
EN 61300-2-33, Fibre optic interconnecting devices and passive components — Basic test and
measurement procedures — Part 2-33: Tests — Assembly and disassembly of fibre optic
mechanical splices, fibre management systems and closures (IEC 61300-2-33)
EN 61300-3-1, Fibre optic interconnecting devices and passive components — Basic test and
measurement procedures — Part 3-1: Examinations and measurements — Visual examination
(IEC 61300-3-1)
EN 61300-3-3, Fibre optic interconnecting devices and passive components — Basic test and
measurement procedures — Part 3-3: Examinations and measurements — Active monitoring of
changes in attenuation and return loss (IEC 61300-3-3)
EN 61300-3-4, Fibre optic interconnecting devices and passive components — Basic test and
measurement procedures — Part 3-4: Examinations and measurements — Attenuation
(IEC 61300-3-4)
EN 61300-3-28, Fibre optic interconnecting devices and passive components — Basic test and
measurement procedures — Part 3-28: Examinations and measurements — Transient loss
(IEC 61300-3-28)
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
fibre management system
system to control fibre routing from the incoming to the out-going fibres, containing one or more
splice cassettes and additional functional elements, and which provides a means for routing,
storing and protecting of fibre splices, connectors or other passive optical devices in a
predetermined order, from one cable sheath opening to another
3.1.2
external network test interface
ENTI
test point which defines the service maintenance boundary of an access network at which
external service provision may be assessed and which can be associated with protection devices
3.1.3
microduct system
system that provides for routing air blown fibres or microduct fibre units, between hollow conduits
(microducts), and interconnects the microducts by use of pneumatic connectors, tube welding,
crimp connectors or push on connectors
3.2 Abbreviations
FMS Fibre Management System
CPE Customer Premises Equipment
ONT Optical Network Terminal
ENTI External Network Test Interface
CATV Cable Television
4 Description
4.1 Optical fibre terminal equipment box housing
The terminal equipment box provides:
— facilities for mounting and protection of stored fibres, connectors, network test interface ENTI
(optional), electronics (ONT/CPE), power supply (optional) and batteries (optional),
— access by user to the electrical data, CATV and telephone outputs,
— a protected fibre management system for storing fibres, connectors and splices,
— sealing of input and output optical and electrical cables.
This also includes terminal equipment boxes used for microduct cable or fibre. The design of the
terminal equipment housing shall allow the jointing or termination of minimum one incoming cable
to the specified number of optical connectors.
Examples of typical terminal equipment applications are given in Figure 1.
Fully
integrated
Modular
Figure 1 — Examples of terminal equipment applications
4.2 Cable fixing
Cable or microduct fixing will be secured by means of mechanical attachment. Axial movement of
the fibre with respect to the microduct shall be taken into account.
4.3 FMS system
The fibre management system provides means for routing, storing and protecting optical fibre
and/or fibre splices, connectors or other passive optical devices.
4.4 Materials
All materials that are likely to come in contact with personne
...