A Horizontal Fiber Optic Splice Closure (HFOSC), often referred to as an inline splice closure, is a robust, hermetically sealed protective unit engineered to safely contain, arrange, and safeguard both fusion and mechanical splices of optical fibers in outdoor and buried. A Horizontal Fiber Optic Splice Closure (HFOSC), often referred to as an inline splice closure, is a robust, hermetically sealed protective unit engineered to safely contain, arrange, and safeguard both fusion and mechanical splices of optical fibers in outdoor and buried. A Horizontal Fiber Optic Splice Closure (HFOSC), often referred to as an inline splice closure, is a robust, hermetically sealed protective unit engineered to safely contain, arrange, and safeguard both fusion and mechanical splices of optical fibers in outdoor and buried fiber-optic communication. Fiber Optic Splice Closures (FOSC) inspecting and testing items Each small package contains one fiber optic splice closure, together with its accessories, tools, installation manual and packing list. Intact in shape, no burrs, bubbles, chaps, pores, warps, impurities and other defects, all. Amidst our wide selection of fiber optic based products, we offer a plethora of Fiber Splice Closures and Fiber Splice Enclosures to assist with your specialized application. Fiber Splice Closures provide the required space essential for fiber optic fusion splicing. In addition, there are two main. 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.