An optical cable split fiber box, also known as a fiber distribution box or fiber optic splice closure, is a device used to terminate, splice, and distribute optical fibers. It typically consists of two parts: an outer housing and an internal structure. One is linked with optical cables for fusion connection between the optical cable and fiber pigtail and the other links with a patch cord. Both fusion and storage functions are compatible with optical cables. The protective design of the cabinet. The article categorizes the various types of fiber optic distribution boxes—including wall-mounted, rack-mounted, outdoor, and dome-shaped designs—each optimized for specific installation environments.