Bi-Directional SFP, BiDi SFP or WDM SFP, is used in bi-directional single fiber communications applications. The compact small form-factor pluggable (CSFP) is a version of SFP with the same mechanical form factor allowing two independent bidirectional channels per port. It is used primarily to increase port density and decrease fiber usage per port. Our Bidi transceiver module cover transmission distance from 10km, 40km, 80km up to 160km. Commercial temperature, Extended and Industrial type up to customer application.