Fiber optic distribution box to be mounted on the wall. Made of gray plastic, with. The FIMP XL from Eks Fiber Optic System is designed for splicing and contains a splice tray, couplings, pigtails, and a cable gland. The front panel and the splice cassette are removable for splicing. Fiber Optic Splice Closure Applications Fiber Point Distribution, FTTx. Glenair manufactures and supplies fiber optic junction boxes incorporating backshells, fiber media protection conduit, and electrical and optical connectors in both catalog and Mil-Spec variants. The junction boxes are designed to seal the incoming cables while accommodating varying diameter of fiber cables that might be used in the field.