This is a 3 port media converter that converts and supports one 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 one 10/100/1000Base-TX(RJ-45) to two 1000Base-X, while extending the network reach beyond the 100 m reach limitation of copper. The 10/100/1000 Mbps UTP RJ-45 port supports full duplex 10/100/1000 Mbps connectivity. The PoE (PSE) ethernet switch is a Power Sourcing Equipment (PSE) which combines data transferred over cable with 52 V power supply, providing power to IEEE802.3at powered device (PD) over CAT5e UTP cable. All the four UTP RJ-45 ports are organized to be PoE output port, and each PoE port can output up to 30 watts power into CAT5e twisted-pair cable. The media converters and network interface cards are 100% compliant for all of networking needs. Now you have a cost effective solution to your network upgrade needs.