The OM4 Multimode SC/UPC Fiber Loopback Module is engineered for high-speed network testing, particularly in 40G/100G environments. It features OM4 50/125μm multimode fiber, optimized for extended bandwidth and superior signal integrity. The SC/UPC connector provides low insertion loss and high repeatability, ensuring accurate test results. This module is ideal for loopback signal testing, transceiver validation, and port diagnostics in data centers, telecom equipment, and lab settings. With its compact, rugged, and plug-and-play design, it enables fast and efficient troubleshooting of optical network systems.