Optical fiber patch cord( fiber jumper) with ISO9001 and 14001 certification ,ROHS. sometimes called a fiber optic patch cord is a length of fiber cabling fitted with LC, SC, FC,MTRJ or ST fiber connectors at each end. The LC, a smaller form factor fiber optic connector, is most commonly used. Fiber jumpers also come in hybrid varieties with one type of connector on one end and another type of connector on the other. Jumpers are used in the same manner as patch cords, to connect end devices or network hardware to the structured cabling system.