The splice tray is a device for connecting optical cables. It is used for fusion splicing and branching of optical fiber, leading the optical cable into the splice tray, splicing, and finally packaging it. The cover can be turned over, and the trays can be stacked to expand the. Fusion splices protected with silicone sealant are often called RTV fusion splices. Heat-shrink fusion splices may be accomplished one fiber pair at a time (single fiber heat-shrink fusion, or HSF) or multiple fiber pairs at a time (heat-shrink mass fusion, or HSMF). Clam-shell style fusion splice. 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.