The Camplex CMX-LB-SM-MPO is a precision testing tool designed for validating optical network equipment and troubleshooting fiber optic systems. A closed-loop connection is created between the transmit and receive ports, allowing technicians to verify signal integrity, diagnose and fix link failures, and confirm proper equipment operation without requiring a remote connection, and extend signals through patching. These are used in a variety of settings, such as data centers, telecom/networking environments, and research and development. The CMX-LB-SM-MPO is used to troubleshoot Single Mode LC applications.