For multimode cable, use only 50/125 patchcords with 50/125 fibers in cables and 62. A fiber optic patch cable (also called a fiber jumper or fiber patch cord) is a section of optical fiber cable with connector terminations on both ends, designed for flexible, short-distance interconnections within an optical network. Although there are several types of each size fibers, matching the fiber type exactly is generally not required, e. They act as the critical link for interconnecting devices like optical switches, servers, and distribution frames. Fiber Optic Standards: Single-Mode vs.