The Fiber Optic Modules are assembled in the FMT sub-rack series: 3 modules in 1U panels and 12 modules in 3U panels. Note : Pluggable 1+1 redundant power, providing stable power supply for the equipment. function module rapid configuration. Finish making your selections or clear them to view relevant specifications. Your web browser (Internet Explorer 11 or lower) is out of date and the functions below will not work with Internet Explorer. You are. The fiber optic splice module (FOSM) shall house and protect fiber optic splices, guarantee proper fiber cable management and bend radius control, and allow for clear labeling and logical organization of the fiber optic splices.