The PLANET MFB-TFA20 is a WDM BiDi SFP optical transmitter/receiver for 100Mbps Fast Ethernet over single-mode fiber with a maximum range of 20 km. It uses an LC connector and operates with TX at 1310nm and RX at 1550nm. The model supports DDM (Digital Diagnostic Monitoring), is hot-pluggable, and complies with SFP MSA, IEEE 802.3, and IEEE 802.3u standards. It is designed for 100Base-BX applications and is suitable for industrial environments with an operating temperature range from -40 to 85°C. The model number is MFB-TFA20, the brand is PLANET, and the EAN code is 4711213689253.