It converts 10/1 OOBASE-TX Fast Ethernet twisted-pair signals to IOOBASE-FX Fast Ethernet fiber signals. This converter has the ability to support distances of up to 2 kilometers for multi-mode fiber and up to 25 kilometers for long-haul single mode fiber between a LAN switch, file server and another networking device. Six LEDs are provided to monitor the operation status of the converter , this media converter is equipped with an RJ-45 port and a fiber optic ST or SC or WDM port, allowing it to quickly integrate a 10/100Base-TX network into a 100Base-FX (fiber) network.