This is an industrial media converter that converts 1 10/100Base-TX(RJ-45) to 1 100Base-BXU(ST) via 1310nmTX/1550nmRX single-mode fiber (SMF) ST, with a maximum distance reach of 20km. This provides a cost effective conversion from 10/100Base-TX(RJ-45) to 100Base-BXU 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.