GT-311 series Ethernet media converter convert 10/100/1000Base-T electrical 0Base-FX optical atically connects the existing copper networking with the booming fiber optic network which greatly saves the project cost. It provides an economic way to extend the network transmission distance from 100m over copper cables to 100km over fiber optical cable. GT-311 full series of feature rich media converters provides options in multi mode/single mode fiber media, 500m~100km transmission distance, SC/FC/ST connector and more to meet the different application and budget requirements. GT-311 series media converter is widely used in telecommunication, transportation, security transmission.