The Fiber Patch Cable is a Jumper between Optical and the terminal box. It is used in optical fiber communication systems, optical fiber access networks, fiber optic data transmission, local area network and. What is a fiber optic jumper Fiber optic jumpers are used as jumpers from equipment to fiber optic cabling links. A fiber optic channel link could consist of only 1 jumper cable that connects devices, or it could have many. Fiber Terminal Box is a terminal protection box for the splicing of fiber optic cable and pigtail. This process requires precision, patience, and a deep understanding of the delicate nature of optical fibers. Available in simplex and duplex, multimode 50/125, OM3, OM4.