This is an industrial media converter that converts 4 10/100Base-TX(RJ-45) to 2 100Base-BXD(FC) via 1550nmTX/1310nm RX single-mode fiber (SMF) FC, with a maximum distance reach of 20km. This provides a cost effective conversion from 10/100Base-TX(RJ-45) to 100Base-BXD fiber, while extending the network reach beyond the 100m reach limitation of copper. 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.