Optical Fiber Patch Cord. Type: SC/UPC-SC/UPC Fiber mode: SM-DX-3.0-3M Quantity: 1 piece Specifications: Insertion Loss (IL) \(\le \) 0.30dB, Return Loss (RL) \(\ge \) 60 dB Function: A fiber-optic patch cord is a cable with connectors at both ends used to connect optical devices.