ST-C Gigabit Single Fiber Converter can convert Optical－Electric Ethernet signals between 10/100/1000M UTP interface (TX) and 1000M optical fiber interface (FX). The traditional 10/100/1000M gigabit Ethernet can be extended to the distance of 90km through single optical fiber link. The performance and quality of the products are excellent because of adopting latest Gigabyte IC from USA and Taiwan. It must be used in couples，because the transmitted optical differs from the receive optical in wavelength. 6 Group LED indicated lights could fully monitor the working conditions of converters. It is easy for users to observe and diagnose the failure of converters.