Extralink Sedir is a media converter that converts the transmission of media between FTP/UTP copper cables and SFP (Small Form-Factor Pluggable) optical transmitter-receiver. The media converter from Extralink is designed to meet the huge needs of Ethernet deployment and allows it to be extended via fiber optic cable over a maximum distance of 80 km (depending on the SFP module used). Installation and operation procedures are very simple. The device status can be monitored locally by a set of diagnostic LEDs on the front panel.