10/100/1000BASE-T to 1000BASE-X 802.3af/atEasily convert 10/100/1000BASE-T to 1000BASE-X 802.3af/at Ethernet with this PoE converter. Know link media issues immediatelyFeatures helpful Link Fault Pass Through (LFP) functionality. LFP immediately alarms administrators to the problem with the link media and provides an efficient solution to monitor the net. Know where connections are downLink Loss Carry Forward (LLCF) informs you of failing links. LLCF means when a device connected to the converter and the TP line lose the link, the converter's fiber will disconnect the link of transmit.