Siemens 6GK6000-8FG05-1AA1 Media Module for RUGGEDCOM RSG2100, RSG2100P, RSG2200, RSG2288 and M2100, 1 x 1000MBit/s LC-interface, Optical: 1000BASE-LX, Single Mode fiber optic up to 25 kilometer, 1300nm (1FG05) (conformal coated). Requires the in-field modification kit.