... Optic Transceiver Module 550m, 10km, 20km, 40km, 80km, 120km are available wavelength: 850nm, 1310nm, 1550n 1.25Gbps SFP Optical ... Monitoring:Internal Calibration or External CalibrationCompatible with SONET OC-24-LR-1Compatible with RoHS+3.3V single power supplyOperating ... Quality with CE,RoHs,FCC,ISO certificate. 1.25G 1000BASE-LH SFP 1310nm 40km SFP fiber transceiver module 100% cisco compatible