This is a media converter that converts a 10/100/1000Base-TX(RJ-45) to 1000Base-BXU(ST) via a 1490nm/1550nm bi-directional (BiDi) single-mode fiber (SMF) ST connector, which allows distance reach up to 60km. This provides a cost effective conversion from 10/100/1000Base-TX(RJ-45) to 1000Base-BXU fiber, while extending the network reach beyond the 100m reach limitation of copper. Our media converters are 100% compliant for all of our networking needs. Now you have a cost effective solution to your network upgrade needs. AddOn 10/100/1000Base-TX(RJ-45) to 1000Base-BXU(ST) BiDi SMF 1490nm/1550nm 60km Media Converter is one of many Networking Transceivers & Converters available through Office Depot. Made by AddOn.