BS EN 50411 is a series on fibre management systems (FMS) and protective housings to be used in optical fibre communication systems. A fibre management system manages fibre connections from outside of the fibre rack to the fibre routers. BS EN 50411-3-4 contains the dimensional, optical, mechanical, and environmental performance requirements of a fully installed optical fibre wall or pole-mounted box, for it to be categorized as a European Standard product. The typical configuration is splicing of incoming fibres to optional splitters and/or to pigtails, connecting pigtail plugs on one side to patch-cord plugs on the other side, using adapters.
BS EN 50411-3-4 specifies the number of splice trays and splice/connector capacity for each fibre separation level. The maximum capacity is 144 connectors and splices. For housings with the highest number of splices and connectors, EN 50411-4-1 (street cabinets) can be used.
BS EN 50411-3-4 on fibre management systems is useful for:
Fibre management systems and protective housings to be used in optical fibre communication systems is a process by which a fibre network is managed. BS EN 50411-3-4 discusses optical fibre wall or pole-mounted box is a protective housing containing a fibre management system with splice trays of various fibre separation levels and connector mounting plates. The box may contain storage and route for fibre and cable, uncut fibre cable storage, splice trays, adapters and connectors, passive optical devices (optical splitters or WDM). The optical fibre wall or pole-mounted box can be installed on a vertical indoor or outdoor surface above ground level. If the box is required to be relocatable with cables attached, the following additional tests are performed which are cable bending and cable torsion. BS EN 50411-3-4 specifies two types of tests which are category C: Controlled (indoor) environment, category A: Aerial (above ground) environment.
The anticipated service life expectancy of the product in this environment is 20 years. BS EN 50411-3-4 accommodates EN IEC 60793-2-50 single-mode fibres and EN 60793-2-10 A1-OM2 to A1-OM5 and A1-OM1 multimode fibres and all EN 60794 series optical fibre cables with various fibre capacities, types, and designs. The design of the pole-mounted box 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. This application is generally known as a distribution joint or external node, but also called a mid-span or balloon splice box. The pole-mounted box will be able to be re-opened without interruption or disturbance of the traffic of the live circuits within the box. Using BS EN 50411-3-4 you can understand the dimensional, optical, mechanical, and environmental performance requirements of a fully installed optical fibre wall or pole-mounted box.
EN 50411-3-4