What is BS EN 50411-3-1 - Fibre organisers and closures to be used in optical fibre communication systems about?
BS EN 50411 is a series on fibre organisers and closures to be used in optical fibre communication systems. Fibre organisers and closures Fiber optic closure, also known as fibre optic splicing closures, is a device used to provide space and protection for fibre optic cables spliced together. BS EN 50411-3-1 covers wall boxes for up to 288 fibre splices. Wall boxes for connectors will be covered in a future part of the EN 50411-3 series. BS EN 50411-3-1 covers two environmental service requirements, for use inside a building under category C and externally of buildings under category G both to EN 61753-1:2007.
BS EN 50411-3-1 contains the initial, start of life dimensional, optical, mechanical, and environmental performance requirements of a fully installed optical fibre wall box, in order for it to be categorised as an EN standard product. The wall box must be suitable for fixing to a vertical internal or external surface above ground level. The wall box is a housing containing a fibre management system, containing splice trays of various fibre separation levels, and may contain one or more of the following:
- Storage and/or routing of cable
- Through-box/uncut fibre, cable storage
- Passive devices
BS EN 50411-3-1 specifies the number of splice trays for each fibre separation level.
Who is BS EN 50411-3-1 - Fibre organisers and closures to be used in optical fibre communication systems for?
BS EN 50411-3-1 on fibre organisers and closures is useful for:
- Telecommunication component manufacturers
- Telecommunication equipment manufacturers
- Design engineers
- Quality control personnel
Why should you use BS EN 50411-3-1 - Fibre organisers and closures to be used in optical fibre communication systems?
The fibre optic closure connects and stores optical fibres safely either in the outside plant or indoor buildings. BS EN 50411-3-1 allows both single-mode and multi-mode fibre to be used and covers all IEC standard optical fibre cables with their various fibre capacities, types and designs as long as fitting in the box does not contravene the minimum bend radius. An optical fibre wall box comprises a housing that is attached to the wall and the ends of the joined cable sheath. The wall box has a means of containing and protecting the fibres, splices, and other passive optical devices.
Wall boxes used for blowing cable or fibre comprises an access housing that allows the interconnection of cable microducts or tubes where the ends of the micro ducts or cables containing empty tubes are contained. The wall box also contains an FSM. The fibre management wall box provides facilities for environmental protection, housing for fibre management systems and sealing of input and output optical cables for category G. In order to comply with BS EN 50411-3-1, the optical functionality, physical, geometrical, and mechanical requirements are defined. The design of the wall box housing allows the joining together of at least one pair of cables that are not at the end of a cable section, without cutting all fibres between both cable openings. BS EN 50411-3-1 is generally known as a distribution joint or external node but is also called a mid-span or balloon splice wall box. It is desirable that the wall box can be re-opened, when necessary, without interruption or disturbance of the traffic of the live circuits. Using BS EN 50411-3-1 you can specify wall boxes for up to 288 fibre splices.
