The BayStack 30F Fast Ethernet Media Converter offers one RJ-45 port for supporting one dual-speed 10 or 100 Mbps link over UTP, and one duplex SC-type connector for supporting 100 Mbps connections over 50/125 and 62.5/125 m multimode fiber optic cabling. The fiber port, which conforms to the IEEE 802.3u 100BASE-FX specification, supports high-speed 100 Mbps fiber links up to 2 km in length.