This subrack is typically used in Optical Fibre Termination activities, where low fusion splice losses are needed for high capacity optical fibre transmission systems, such as e.g. DWDM systems.
A major feature of this tray is the minimum amount of movement that occurs to optical fibre loose tubes as the tray opens and closes. This ensures a very high degree of protection for working services. Also, the rear located splice trays are housed in a protected position, because there is very little chance of them being disturbed, as the subracks tray is opened.