Ethernet media converter is used to conduct the transmission conversion between Ethernet networks and optical fiber networks. The Ethernet to fiber converter can convert the Ethernet digital electric signals to optical signals, while the fiber to Ethernet media converter can convert optical signals to Ethernet digital electric signals. We supply many types of Ethernet media converters, such as 10/100M BIDI WDM version and 10/100M version with SFP port or SC port. These media converters extend transmission distances well beyond the capabilities of twisted pair wiring, and can reach up to 2km, 20km, 40km, 60km, 80km, 100km, and 120km. All of them have reliable and stable operation in work environments.