AT-MC13 Ethernet Media Converter UTP to Fiber ST Ethernet Media Converter Allied Telesis Ethernet media converters provide a complete family of conversion devices, allowing users to extend the size of their UTP networks using fiber optic cable. Supporting all major fiber connectors and both multimode and single-mode fiber, these converters can be used to extend networks over fiber distances of up to 15km. 10.5cmX10cmX2.5cm