Fiber Optic Furcation Tube is a type of jacketing used to protect and organize sensitive optical fibers while adding a layer of strength for greater durability and longevity. What is the difference between these fiber boxes. Let's look at the position of various fiber box in. The FDB-08R Riser Box, also called Indoor floor distribution box or FTTH pass-trough enclosure is designed for use within apartment blocks and mid/high rise office blocks. It serves as a central point for fiber optic cable termination, splicing, and. Home Learning Center What is the difference between a Splitter Distribution Box, ODF, and Fiber Terminal Box? What is the difference between a Splitter Distribution Box, ODF, and Fiber Terminal Box? In modern FTTH (Fiber to the Home) and optical communication networks, three types of fiber.