This is a six port media converter that converts and supports four 10/100/1000Base-TX(RJ-45) to two 1000Base-X via 2 open SFP port connectors. The open SFP ports allows users to customize between the SX, LX, or BX connections. This media converter provides a cost effective conversion from four 10/100/1000Base-TX(RJ-45) to two 1000Base-X, while extending the network reach beyond the 100m reach limitation of copper. All the four 10/100/1000Mbps UTP RJ-45 ports support full duplex 10/100/1000Mbps connectivity (half duplex only supported in 10/100Mbps mode). The PoE(PSE) ethernet switch is a Power Sourcing Equipment (PSE) which combines data transfered over cable with 52V(typical) power supply, providing power to IEEE802.3at powered device (PD) over CAT5e UTP cable (cable length up to 100 meters/330 feet). All the four UTP RJ-45 ports are organized to be PoE output port, and each PoE port can output up to 30 watts (DC 52V/0.6A) power into CAT5e twisted-pair cable. Our media converters and network interface cards are 100% compliant for all of our networking needs. Now you have a cost effective solution to your network upgrade needs. With our certification test program, we can guarantee your product will work right the first time.