TP-LINK MC112CS 10/100M RJ45 to 100M Single-mode SC Fiber Converter, Full-duplex,Tx:1310nm, Rx:1550nm, up to 20Km, Switching Power Adapter - Complies with 802.3u 10/100Base-TX, 100Base-FX standards - Auto negotiation of 10/100Mbps and auto MDI/MDIX for TX port - Provide switch configuration of Half-Duplex / Full-Duplex transfer mode for FX port - Link Fault Passthrough and Far End Fault minimize the loss caused by link failure timely - Adopts WDM technology, transmitting and receiving data on one single fiber - Extend fiber distance up to 20km - Easy-to-view LED indicators provide status to monitor network activity easily •External power supply