Fiber-Optic Patch Cables SC Duplex E9/125 Fiber Optic Patch Cable, 2.0 m. Telegärtner’s LC-Duplex fiber optic patch cables can be used within a structured cabling system (ISO/IEC 11801) in locations such as data centers, office buildings, telecommunications rooms, and anywhere else where fiber optic patch cables are needed. Of all the components in a transmission path, patch cables are subjected to the highest stresses and the greatest wear and tear. That is why many users rely on Telegärtner patch cords: perfectly matched components, the highest quality standards, a fully controlled manufacturing process, and 100% attenuation testing guarantee secure, reliable network operation.