Belkin 3-Meter Multimode Duplex Fiber Optic Patch Cable These multimode fiber optic patch cables use 50/125 Micron bulk fiber cable and are terminated with various fiber optic connectors at both ends. Used to connect two nearby components with fiber connectors, these Cables transmit data with light, so you don’t have to worry about electrical interference. Belkin carries a variety of fiber-optic patch cables in an assortment of connector styles and lengths. All fiber-optic cables are 100% tested for quality and reliability. These new cables are ideal for drop-in replacement for copper-based modular connector systems because they use the same as an RJ45 copper connector.