Fibre management systems and protective housings to be used in optical fibre communication systems - Product specifications - Part 4-1: Passive optical street cabinet for category A

This European Standard covers street cabinets for up to 1440 fibre connections for use in outside plant environments under category A according to EN 61753-1:Ed2. This document contains the initial, start of life dimensional, optical, mechanical and environmental performance requirements of a fully installed passive optical fibre street cabinet, in order for it to be categorised as an EN standard product. The street cabinet is a housing containing modular fibre management systems with splice trays for various fibre separation levels and connector mounting plates. The street cabinet may contain one or more of the following: storage and/or routing of cable; through-box/uncut fibre, cable storage; connectors passive optical devices.

LWL-Spleißkassetten und -Muffen für die Anwendung in LWL-Kommunikationssystemen - Produktnormen - Teil 4-1: Passiver Straßenverteilerschrank für die Kategorie A

1 Anwendungsbereich 1.1 Produktdefinition Dieses Dokument behandelt passive Straßen-Verteilerschränke zur Verwendung in Außenanlagen unter Kategorie A nach EN 61753-1. Dieses Dokument enthält die maßbezogenen, optischen, mechanischen und umgebungsbezogenen Anforderungen an das Betriebsverhalten eines installierten passiven Straßen-Verteilerschranks, um dieses Produkt als ein Produkt nach einer Europäischen Norm einstufen zu können. Der Straßen-Verteilerschrank ist ein Schutzgehäuse, das ein modulares Fasermanagementsystem mit Spleißkassetten für unterschiedliche Fasertrennungsebenen und Steckverbinder-Montageplatten enthält. Der Straßen-Verteilerschrank darf enthalten: – Ablage und Führung für Fasern und Kabel; – Ablage für Kabel(-schleifen) mit ungeschnittener Faser; – Spleißkassetten; – Adapter und Steckverbinder; – passive optische Bauteile (optische Leistungsteiler und Wellenlängenmultiplexer). Straßen-Verteilerschränke können außerdem aktive optische Bauteile enthalten (Verstärker, Wandler, Stromversorgungen), diese Anwendungen sind jedoch nicht Teil dieses Dokuments. 1.2 Betriebsumgebung Die ausgewählten Prüfungen, zusammen mit Schärfegrad und Dauer, sind repräsentativ für oberirdische Anlagen im Freien, festgelegt in EN 61753-1, Kategorie A: Oberirdische Umgebung. 1.3 Zuverlässigkeit Obwohl die erwartete Betriebsdauer des Produkts in dieser Umgebung 20 Jahre beträgt, garantiert die Übereinstimmung mit diesem Dokument nicht die Zuverlässigkeit des Produkts. Diese sollte unter Verwendung eines anerkannten Programms zur Bewertung der Zuverlässigkeit vorausgesagt werden. 1.4 Qualitätssicherung Übereinstimmung mit diesem Dokument garantiert nicht die Fertigungskonsistenz des Produkts. Diese sollte mit einem anerkannten Qualitätssicherungsprogramm sichergestellt werden. 1.5 Zulässige Faser- und Kabeltypen Diese Norm für Straßen-Verteilerschränke erlaubt die Verwendung von Einmodenfasern nach EN 60793-2-50 und A1-OM1- und A1-OM5-Mehrmodenfasern nach EN 60793-2-10 und sie eignet sich für alle LWL-Kabel der Normenreihe EN 60794 mit ihren verschiedenen Faserfassungsvermögen, Typen und Konstruktionen, solange ihre Befestigung im Schrank nicht dem Mindestbiegeradius von Faser oder Kabel widerspricht.

Systèmes de gestion des fibres et enveloppes de protection à utiliser dans les systèmes de communication par fibres optiques - Spécifications de produits - Partie 4-1: Armoire située dans un environnement urbain pour fibres optiques passives, pour la catégorie A

1.1 Définition du produit La présente Norme européenne couvre les armoires situées dans un environnement urbain pour fibres optiques passives destinées à être utilisées dans des installations extérieures pour la catégorie A conformément à l'EN 61753-1. Le présent document contient les exigences de performances dimensionnelles, optiques, mécaniques et environnementales applicables à une armoire située dans un environnement urbain pour fibres optiques passives installée afin d'être classée comme un produit conforme à une Norme européenne. L'armoire située dans un environnement urbain est une enveloppe de protection qui contient des systèmes de gestion des fibres modulaires avec des plateaux d'épissures de différents niveaux de séparation de fibres et des plaques de montage des connecteurs. L'armoire située dans un environnement urbain peut contenir un ou plusieurs des éléments suivants: - élément pour le stockage et le cheminement des fibres et des câbles; - élément pour le stockage de câbles et fibres non découpés (en boucle); - plateau d'épissures; - raccords et connecteurs; - composants optiques passifs (séparateurs de puissance optique et multiplexeurs par répartition en longueurs d'onde). Les armoires situées dans un environnement urbain peuvent également contenir des composants optiques actifs (amplificateurs, convertisseurs, alimentations), mais ces applications ne font pas partie du présent document. 1.2 Environnement de fonctionnement Les essais sélectionnés combinés aux sévérités et aux durées sont représentatifs d'une installation extérieure pour des environnements au-dessus du niveau du sol définis par l'EN 61753-1 Catégorie A: environnement aérien. 1.3 Fiabilité Bien que l'espérance de vie en service anticipée du produit dans cet environnement soit de 20 ans, la conformité à la présente Norme européenne ne garantit pas la fiabilité du produit. Il convient que celle-ci soit prédite en utilisant un programme reconnu d'évaluation de la fiabilité. 1.4 Assurance de la qualité La conformité à la présente Norme européenne ne garantit pas la cohérence de fabrication du produit. Il convient qu'elle soit maintenue en utilisant un programme reconnu d'assurance de la qualité. 1.5 Types de fibres et câbles autorisés La présente norme applicable aux armoires situées dans un environnement urbain concerne les fibres unimodales conformes à l'EN 60793-2-50, les fibres multimodales conformes à l'EN 60793-2-10 A1a et A1b et tous les câbles à fibres optiques des séries EN 60794 avec différentes capacités de fibres, différents types et différentes conceptions tant que l'installation dans l'armoire ne remet pas en cause le rayon de courbure minimal de la fibre ou du câble.

Sistemi za upravljanje z optičnimi vlakni in zaščitna ohišja za optične komunikacijske sisteme - Specifikacije izdelka - 4-1. del: Pasivna optična ulična omarica za kategorijo A

Ta evropski standard zajema ulične omarice za do 1440 optičnih povezav za uporabo v okoljih zunanjih napeljav iz kategorije A v skladu s standardom EN 61753-1:Ed2.
Ta dokument vsebuje začetne dimenzijske, optične, mehanske in okoljske funkcionalne zahteve, ki jih mora na začetku življenjske dobe izpolnjevati v celoti nameščena ulična omarica s pasivnimi optičnimi vlakni, da se lahko kategorizira kot izdelek v skladu s standardom EN.
Ulična omarica je ohišje, ki vsebuje modularne sisteme za upravljanje optičnih elementov s pladnjem s spojnicami za različne ravni ločevanja vlaken in ploščami za namestitev konektorjev. Ulična omarica lahko vsebuje eno ali več naslednjih stvari:
shrambo in/ali traso za kable;
vlakna za omarico/nerezana vlakna, shrambo kablov;
konektorje
pasivne optične naprave.

General Information

Status
Published
Publication Date
27-Jun-2019
Current Stage
6060 - Document made available
Due Date
28-Jun-2019
Completion Date
28-Jun-2019

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SLOVENSKI STANDARD
SIST EN 50411-4-1:2019
01-september-2019
Sistemi za upravljanje z optičnimi vlakni in zaščitna ohišja za optične

komunikacijske sisteme - Specifikacije izdelka - 4-1. del: Pasivna optična ulična

omarica za kategorijo A
Fibre management systems and protective housings to be used in optical fibre

communication systems - Product specifications - Part 4-1: Passive optical street cabinet

for category A
LWL-Spleißkassetten und -Muffen für die Anwendung in LWL-Kommunikationssystemen
- Produktnormen - Teil 4-1

Organiseurs et boîtiers de fibres à utiliser dans les systèmes de communication par

fibres optiques - Spécifications de produits - Partie 4-1
Ta slovenski standard je istoveten z: EN 50411-4-1:2019
ICS:
31.240 Mehanske konstrukcije za Mechanical structures for
elektronsko opremo electronic equipment
33.180.20 Povezovalne naprave za Fibre optic interconnecting
optična vlakna devices
SIST EN 50411-4-1:2019 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 50411-4-1:2019
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SIST EN 50411-4-1:2019
EUROPEAN STANDARD EN 50411-4-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2019
ICS 33.180.20; 33.180.99
English Version
Fibre management systems and protective housings to be used
in optical fibre communication systems - Product specifications -
Part 4-1: Passive optical street cabinet for category A

Organiseurs et boîtiers de fibres à utiliser dans les LWL-Spleißkassetten und -Muffen für die Anwendung in

systèmes de communication par fibres optiques - LWL-Kommunikationssystemen - Produktnormen - Teil 4-1

Spécifications de produits - Partie 4-1

This European Standard was approved by CENELEC on 2019-05-20. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the

Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels

© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 50411-4-1:2019 E
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SIST EN 50411-4-1:2019
EN 50411-4-1:2019 (E)
Contents

European foreword .................................................................................................................................. 4

1 Scope .............................................................................................................................................. 6

1.1 Product definition ................................................................................................................... 6

1.2 Operating environment .......................................................................................................... 6

1.3 Reliability ............................................................................................................................... 6

1.4 Quality assurance .................................................................................................................. 6

1.5 Allowed fibre and cable types ................................................................................................ 6

2 Normative references ...................................................................................................................... 7

3 Terms, definitions and abbreviations............................................................................................... 8

3.1 Terms and definitions ............................................................................................................ 8

3.2 Abbreviations ....................................................................................................................... 11

4 Description ..................................................................................................................................... 11

4.1 Optical fibre street cabinet ................................................................................................... 11

4.2 Cable sealing ....................................................................................................................... 14

4.3 Cable anchoring ................................................................................................................... 14

4.4 Fibre management system (FMS) ....................................................................................... 14

4.5 Patchcords and pigtails ....................................................................................................... 15

4.6 Adapters .............................................................................................................................. 15

4.7 Passive optical components ................................................................................................ 15

4.8 Materials .............................................................................................................................. 15

4.9 Marking and identification .................................................................................................... 15

5 Variants ......................................................................................................................................... 16

6 Dimensional requirements ............................................................................................................. 18

7 Tests .............................................................................................................................................. 19

7.1 Sample size ......................................................................................................................... 19

7.2 Test sample preparation ...................................................................................................... 19

7.2.1 Sealing performance test samples .............................................................................. 19

7.2.2 Optical performance test samples ............................................................................... 19

7.3 Test and measurement methods ......................................................................................... 20

7.4 Test sequence ..................................................................................................................... 20

7.5 Pass/fail criteria ................................................................................................................... 20

8 Test report ..................................................................................................................................... 21

9 Performance requirements ............................................................................................................ 21

9.1 Dimensional and marking requirements .............................................................................. 21

9.2 Sealing, optical and appearance acceptance criteria .......................................................... 22

9.3 Mechanical sealing performance requirements ................................................................... 23

9.4 Environmental sealing performance requirements .............................................................. 26

9.5 Mechanical optical performance requirements .................................................................... 27

9.6 Environmental optical performance requirements ............................................................... 28

9.7 Material requirements .......................................................................................................... 28

Annex A (informative) Fibre details for test sample ............................................................................... 29

Annex B (informative) Sample size and product sourcing requirements .............................................. 30

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SIST EN 50411-4-1:2019
EN 50411-4-1:2019 (E)

Annex C (informative) Families of fibre management systems covered in this standard ..................... 31

Annex D (informative) Dimensions of FMS for multiple elements and multiple ribbon ......................... 32

Annex E (informative) Dimensions of S type fibre management system for single circuit, single

element and single ribbon ............................................................................................................. 33

Annex F (informative) Adapter, plug and cable assembly connector dimensions ................................ 35

Bibliography ........................................................................................................................................... 36

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SIST EN 50411-4-1:2019
EN 50411-4-1:2019 (E)
European foreword

This document (EN 50411-4-1:2019) 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 be (dop) 2020-05-20
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2022-05-20
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 shall not be held responsible for identifying any or all such patent rights.

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SIST EN 50411-4-1:2019
EN 50411-4-1:2019 (E)

Fibre management systems and protective housings to be used in optical fibre communication systems –

Product specifications
Part 4-1: Passive optical street cabinet for category A
Description Typical installation configuration Typical mounting options
Street Cabinet Outdoor Fibre Distribution Cabinet On the ground
Typical fibre management configurations
- Direct spliced fibres with and without branching devices
- Interconnect with and without branching devices
- Cross-connect with and without branching devices
Operating service environments
Applications:
Optical fibre cable networks EN 61753-1 category A
For outdoor above ground (aerial) applications
Modular adapter plates for the following connectors
Connector type Adapter size Standard
SC Simplex or duplex EN 61754-4
LC Simplex or duplex EN 61754-20
LSH Simplex or Duplex EN 61754-15
LF3 Simplex or Duplex EN 61754-28
MPO Simplex EN 61754-7
Fibre separation levels in Fibre Management System
Single circuit (1, 2 or 4 fibre splices per tray),
Single ribbon (1 ribbon splice per tray),
Single element (6, 8 or 12 fibre splices per tray),
Multiple ribbon (12 ribbon splices per tray)
Multiple element (up to 144 fibre splices per tray)
Street cabinet sizes and dimensions
Maximum outline dimensions
Maximum
Maximum
(mm)
connections
Size fibre splice
(adapters)
capacity
W H D
capacity
A 288 216 500 1 000 400
576 432 800 1 000 400
C 768 576 1 300 1 200 400
D 1 024 768 1 300 1 500 400
E 1 296 972 1 900 1 500 400
F 1 728 1 296 1 900 1 800 400
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SIST EN 50411-4-1:2019
EN 50411-4-1:2019 (E)
1 Scope
1.1 Product definition

This document covers passive optical fibre street cabinets for use in outside plant environments under

category A according to EN 61753-1.

This document contains the dimensional, optical, mechanical and environmental performance

requirements of an installed passive optical fibre street cabinet, in order for it to be categorised as an

European standard product.

The street cabinet is a protective housing containing a modular fibre management system with splice

trays for various fibre separation levels and connector mounting plates. The street cabinet may contain

one or more of the following:
– storage and routing of fibre and cable;
– uncut (looped) fibre and cable storage;
– splice trays;
– adapters and connectors;

– passive optical components (optical power splitters and wavelength division multiplexers).

Street cabinets can also contain active optical components (amplifiers, converters, power supplies),

but these applications are not part of this document.
1.2 Operating environment

The tests selected, combined with the severity and duration, are representative of outside plant above

ground environments defined by EN 61753-1 Category A: Aerial environment.
1.3 Reliability

Whilst the anticipated service life expectancy of the product in this environment is 20 years,

compliance with this document 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 document 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

This street cabinet standard allows EN 60793-2-50 single-mode fibres and EN 60793-2-10 A1-OM1 to

A1-OM5 multimode fibres to be used and is suitable for all EN 60794 series optical fibre cables with

their various fibre capacities, types and designs as long as fitting in the cabinet does not contravene

the minimum bend radius.
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SIST EN 50411-4-1:2019
EN 50411-4-1:2019 (E)
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 60529, Degrees of protection provided by enclosures (IP Code) (IEC 60529)

EN 60793-2-10, Optical fibres -Part 2-10: Product specifications -Sectional specification for category

A1 multimode fibres (IEC 60793-2-10)

EN 60793-2-50, Optical fibres - Part 2-50: Product specifications - Sectional specification for class B

single-mode fibres (IEC 60793-2-50)

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 2-9: 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 61300-2-26, Fibre optic interconnecting devices and passive components - Basic test and

measurement procedures - Part 2-26: Tests - Salt mist (IEC 61300-2-26)

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 61300-2-34, Fibre optic interconnecting devices and passive components - Basic test and

measurement procedures - Part 2-34: Tests - Resistance to solvents and contaminating fluids of

interconnecting components and closures (IEC 61300-2-34)

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 61300-3-28, Fibre optic interconnecting devices and passive components - Basic test and

measurement procedures - Part 3-28: Examinations and measurements - Transient loss (IEC 61300-

3-28)

EN 61753-1, Fibre optic interconnecting devices and passive components performance standard -

Part 1: General and guidance for performance standards (IEC 61753-1)

EN 61756-1, Fibre optic interconnecting devices and passive components - Interface standard for fibre

management systems - Part 1: General and guidance (IEC 61756-1)
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SIST EN 50411-4-1:2019
EN 50411-4-1:2019 (E)
3 Terms, definitions and abbreviations
3.1 Terms and definitions

For the purposes of this document, the following terms and definitions 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
active fibre or live fibre
fibre in an optical circuit or node that is carrying an optical signal
3.1.2
adapter
component in which two or more ferrules are aligned

Note 1 to entry: A ferrule is the fibre holding component part of the optical fibre connector plug.

3.1.3
cable element
grouping of fibres under the cable sheath
3.1.4
fan-out

passive optical component providing a transition between a single ribbon or single element and

individual fibres
3.1.5
fibre management system
FMS

system to control, protect and store splices, connectors, passive optical components and fibres from

incoming to outgoing cables

Note 1 to entry: A fibre management system is intended for installation within a protective housing.

Note 2 to entry: A fibre management systems is often called an “organiser”.
3.1.6
free breathing housing
protective housing that allows a free exchange of air with the environment

Note 1 to entry: Free breathing closures are used in aerial environments for the interconnection of cables. Limited

water ingress and/or limited dust ingress is possible. Free breathing housings are not intended for use in areas

that are subject to flooding or water immersion.

Note 2 to entry: A free breathing closure may look like a sealed closure, but it is not designed to hold a varying

overpressure or underpressure caused by temperature changes or atmospheric pressure changes.

3.1.7
microduct
small, flexible lightweight tube with an outer diameter between 3 mm and 16 mm
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SIST EN 50411-4-1:2019
EN 50411-4-1:2019 (E)
3.1.8
multiple element
physical fibre separation level consisting of more than one single element

Note 1 to entry: This separation level has fibres from multiple cable elements on one splice tray and is also

called mass storage. It is the lowest (worst) degree of physical circuit separation.

3.1.9
multiple ribbon

multiple element consisting of multiple optical fibres (circuits) arranged in ribbons (fibres in parallel)

which are arranged e.g. in stacks
3.1.10
optical fibre connector

component normally attached to a cable or piece of apparatus for the purpose of providing

interconnection and disconnection of fibre optic cables

Note 1 to entry: The interconnection usually consists of two plugs mated together in an adapter or 1 plug mated

in a socket.
3.1.11
passive optical component

optical component or assembly which does not require any source of energy for its operation other

than optical input signals, or controls the dynamic or static characteristics of optical signals using a

source of energy

Note 1 to entry: A passive optical component never generates an optical gain of signal power.

Note 2 to entry: Examples include optical attenuators and passive branching devices.

3.1.12
patchcord

length of optical fibre or cable, permanently terminated at both ends with a plug

3.1.13
pigtail
length of optical fibre or cable, permanently terminated at one end with a plug
3.1.14
protective housing

indoor and outdoor housing utilised for the storage, distribution or protection of one or more cable

joints or passive or active telecom equipment

Note 1 to entry: examples of protective housings: wall boxes, cabinets, cases, optical distribution frame sub racks,

closures or pedestals. A closure can be either a “sealed closure” or a “free breathing closure”

Note 2 to entry: a protective housing contains a fibre management system
3.1.15
single circuit

physical fibre separation level where the optical circuit consists of one fibre (single fibre), or more than

one fibre, providing all services for one subscriber

Note 1 to entry: This fibre separation level has the fibre(s) of only one customer on one splice tray. It is the

highest (best) degree of physical circuit separation. Single circuit minimizes the disturbances of the operated

circuits when accessing any adjacent circuit.
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SIST EN 50411-4-1:2019
EN 50411-4-1:2019 (E)
3.1.16
single element

physical fibre separation level in the cable subassembly comprising one or more optical fibres inside a

common covering e.g. in a tube or inside one groove of a grooved cable (slotted core cable)

Note 1 to entry: A single element provides services to more than one subscriber.

Note 2 to entry: This fibre separation level has all fibres from a cable element (e.g. loose tube) on one splice

tray. It is an intermediate degree of physical circuit separation (between single circuit and multiple element).

3.1.17
single ribbon
physical fibre separation level with all fibres grouped in one ribbon

Note 1 to entry: Depending on the fibres’ deployment, a single ribbon can contain all the fibres of one circuit

(single circuit) or the fibres of more than one circuit (single element).
3.1.18
splice tray

structure that organises and controls storage of fibre splices in an orderly manner, together with the

associated excess uncabled fibre length
Note 1 to entry: A splice tray is a part of a fibre management system.
3.1.19
street cabinet

free breathing, outdoor, above ground installed housing that is permanently attached to the ground

Note 1 to entry: A street cabinet is permanently fixed to the ground and is not specifically designed to allow cable

movement (e.g. torsion, bending) during operation
3.1.20
transient loss

short term (milliseconds) reversible change of optical transmission characteristics arising from optical

discontinuity, physical defects and modifications of the attenuation (e.g. bend loss) normally caused by

mechanical stress
3.1.21
uncut fibre

fibres from a continuous cable with the cable sheath removed over a defined length

Note 1 to entry: Uncut fibres typically comprise a section of cable where the cable sheath has been removed and

the cable tubes or uncut fibres are cleaned as for installation. These uncut tubes or fibres are then stored, usually

inside a protective housing, in a loop. When required the fibres or tubes are then cut and the fibres connected or

spliced.
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SIST EN 50411-4-1:2019
EN 50411-4-1:2019 (E)
3.2 Abbreviations
FMS Fibre Management System
FTTH
Fibre to the Home
ME Multiple Element
MR Multiple Ribbon
NA Not applicable
OD Outside Diameter
SC Single Circuit
Single Element
SR Single Ribbon
WDM Wavelength Division Multiplexer
4 Description
4.1 Optical fibre street cabinet

An optical fibre street cabinet comprises a housing that is permanently mounted on the ground or on

the wall. An example of a street cabinet is given in Figure 1.
Roof (see note)
Outdoor enclosure
Subrack with FMS or
Fibre optic modules
Cable entrance with fixings
Base (see note)

NOTE The cabinet may be closed at the top and the bottom without additional parts. Specific roofs and/or

bases are assumed to be optional for technical or aesthetic reasons and are not part of this standard

Figure 1 — Street cabinet example
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SIST EN 50411-4-1:2019
EN 50411-4-1:2019 (E)

The street cabinet has a means of containing and protecting the fibres, splices, connectors, passive

optical splitters and other passive optical devices e.g. WDM

Street cabinets used for blowing cable or fibre contain an area where the ends of the microducts or the

protected microducts, terminated with water and gas blocking, are placed.

A street cabinet shall allow the entrance of 2 main (feeder) cables and the distribution of at least 12

drop cables.
NOTE Cable entries can have more than one cable per cable entry port.

The design of the street cabinet may allow the joining together of at least one pair of cables which are

not at the end of a cable section without cutting all fibres between both cable openings. This

application is generally known as a mid-span or balloon splice configuration.

A street cabinet shall be able to be re-opened without interruption or disturbance of the traffic to the

live circuits within the cabinet.

The various fibre management configurations of the optical fibre street cabinets are given in Figure 2.

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SIST EN 50411-4-1:2019
EN 50411-4-1:2019 (E)
a) Direct splice (without splitters)
b) Direct splice with splitters
c) Interconnect without splitters
d) Interconnect with splitters
e) Cross-connect without splitters

f) Cross-connect with splitter integrated in module with splice tray and patch panel

g) Cross-connect with individual pigtailed splitter module
h) Cross-connect with individual splitter integrated in distribution module
Figure 2 — Examples of street cabinet applications
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SIST EN 50411-4-1:2019
EN 50411-4-1:2019 (E)
4.2 Cable sealing

For environmental category A the cable entry ports in the street cabinet shall have a sealing and

attachment system that can be:

a) heat activated by a heat source, for example, electrical, infrared, hot air or flame:

1) thermo-shrinkable materials;
2) hot melt adhesives;
3) polyethylene injection welding;
b) Cold applied:
1) mastic, tapes, pastes, potting compounds, gels and cold adhesives;
2) o-rings, grommets, rubber shapes, pre-expanded tubing;
c) combination of heat activated and cold applied.
4.3 Cable anchoring

The outer cable sheath and central strength members shall be attached to the hardware of the street

cabinet. The input cable anchoring shall not be disturbed when adding or removing cables. Small

diameter drop cable, cords or microduct tubes are typically attached by mechanical clamping on the

outer cable sheath. The design of the cable clamps shall not cause any optical performance

degradation of the cables.
4.4 Fibre management system (FMS)

The FMS provides means to control, protect and store splices, connectors, passive optical

components and fibres from incoming to outgoing cables. The fibre management system in street

cabinets shall be compliant with the requirements of EN 61756-1.

Fibre circuits may be separated to an appropriate separation level SC, SE, SR, ME and MR. This will

limit the risk of interruption to traffic in those fibres belonging to the same group of circuits.

The minimum bend radius of the stored fibres in an FMS can be found in EN 61756-1 and depends

on:
a) the required failure probability target (location in the network);
b) the length of fibre to be stored;
c) the fibre type;
d) the longest transmission wavelength;
e) the minimum allowed increase in attenuation (macro bending loss).
NOTE 1 The families of FMS covered in this document are listed in Annex C.

NOTE 2 Definitions of fibre separation levels SC, SE, SR, ME, MR are listed in Clause 3.

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EN 50411-4-1:2019 (E)
4.5 Patchcords and pigtails

Patchcords and pigtails with optical connectors are used in fibre management systems where frequent

reconfiguration is expected. The fibre management system shall provide the means to manage the

related over-length in an orderly manner (i.e. controlled bend radius, accessibility, limited amount of

cross-over).
4.6 Adapters

Adapters are typically mounted on an adapter plate or mounted on the modules containing the passive

optical components. All adapters shall be clearly and uniquely identifiable by a label or by

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