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). 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.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). 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.