PON-optimized OTDR module designed for characterization of FTTx and MDU networks; supports measurements at 1310, 1490, 1550 and 1625/1650 nm. Available in multiple wavelength/configuration variants; optimized for testing through splitters (up to 1x64 or 1x128 with PON optimization), includes filtered SM Live port for in-service measurements, high sampling resolution (up to 256,000 points), and platform compatibility with FTB-2, FTB-200 and FTB-500.