The FOCUS-MSC-AC watertight closure (IP68, IEC 529) was created for the management and the splicing of high capacity fiber optic cables. Differently to the other Optotec’s closure, it accommodates FOCS MST trays, up to max. 8. FOCUS MST trays are splice only and they have a maximum capacity of 96 f.o. joints, both heath shrinkable FIBERTERM and mechanical FIBERCLIP. In the upper part of the tray it is possible to allocate PLC.