... SMF. The transceiver consists of three sections:a DFB laser transmitter,a PIN photodiode integrated with a trans-impedance preamplifier ... unit. All modules satisfy class I laser safety requirements. The transceivers are compatible with SFP Multi-Source Agreement (MSA) and SFF-8472 ... 100% Compatible with Cisco,HP,Finisar,3com, etc. 1.25G , Fiber Optical Transceiver ,CWDM-GBIC-1550nm ,GBIC transceiver,