EXFO America Inc. FTB-730-023B-04-XX FTB-730-023B-04-XX, SM OTDR ModulePort 1 : 1310/1550 nm, 39/37 dB (9/125 µm)Port 2 : Filtered 1625 nm, 39 dB (9/125 µm) for live fiber testing with in-line power meter (one broadband channel)