Corning Fiber Optic Splice Closures are designed for splicing fibers in aerial, duct and buried applications. Equipped with the optical cable docking function of the optical cable splicing box and the function of splicing, branching, and distribution of optical fibers. Can be used. Whether your fiber to the home (FTTH) network design has closures in a buried or aerial environment, one thing remains the same: you need assured environmental protection and quick, incremental subscriber drops. From our experience in the field, we know that not all closures are the same. They are also referred to as Optical Termination Boxes. You can find fiber splice boxes and. Splice boxes ensure continuously reliable real-time data transmission. Distributor, design: Rail-mountable module, degree of.