Bi-directional (BiDi) SFP transceivers are high performance, cost effective modules supporting dual data-rates of 1.25Gbps/1.0625Gbps and 20km transmission distance with SMF. These SFPs use Wavelength Division (WDM) technology, mixing two wavelengths simultaneously. This SFP module accepts 1 LC connector and must be used as a pair: SSF-SFP-SM1GBDA matched with SSF-SFP-SM1GBDB. The SSF-SFP-SM1GBDA consists of three sections: a FP laser transmitter, a PIN photodiode integrated with a transimpedance preamplifier (TIA) and MCU control unit. The SSF-SFP-SM1GBDB transceiver consists of three sections: a DFB laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. All modules satisfy class I laser safety requirements. The transceivers are compatible with SFP Multi-Source Agreement (MSA) and SFF-8472. For further information, please refer to SFP MSA.