100M Ethernet RJ45 to Optic Optical Fiber Fibre Multi-Mode Media Converter This Fast Ethernet Media Converter can converts 100Base-FX fiber optic media to 10/100Base-TX twisted pair media and expand your connection. Fiber type: Multi-mode dual fiber(RX/TX). Long Distance up to 2.5KM. Standard RJ45 and SC optic fiber interface. Data transfer speed auto adaption: 10/100Mbps.