The 302MC-N-ST is a media converter from Red Lion Controls that connects 10/100BaseTX Ethernet devices to 100BaseFX fiber cabling. It can also convert copper and fiber optic. Here are some features of the 302MC-N-ST: 1 RJ45 port (10/100BaseTX) 1 fiber optic ST connector (multi-mode; 100BaseFX; 2km rated optical fiber) Supply voltage 10-30Vdc (12Vdc / 24Vdc) DIN rail mounting 2km multimode cable with an ST style connector Port monitoring software N-View firmware option Operating temperature of -20° to 70°C Auto-negotiates the speed and flow control capabilities of the TX copper port connection