The FTBx-730C is a modular PON FTTx/MDU OTDR module optimized for FTTx/MDU deployments and troubleshooting. It offers high dynamic range (up to 39 dB), support for high-port-count PON splitters (up to 1×128), live in-service fiber testing at 1625 or 1650 nm (filtered), short dead zones, optional in-line power meter, and is iOLM-ready for automated multi-acquisition testing.