RUGGEDCOM RSG2100 is an industrially hardened, fully managed Ethernet switch; 128-bit Encryption; Up to 3-Gigabit Ethernet ports copper and/or fiber; Up to 16-Fast Ethernet ports copper and/or fiber; 2 port modules for tremendous flexibility; Non-blocking, store and forward switching; Supports many types of fiber (multimode, singlemode, Bi-directional single strand) Long haul optics allow Gigabit distances up to 70km Multiple connector types (ST, MTRJ, LC, SC, RJ45, micro-D) HI = 88-300 VDC or 85-264 VAC, screw terminal block HI = 88-300 VDC or 85-264 VAC, screw terminal block RM = 19" Rack Mount Kit R = Ethernet on rear; LED panel on front; power connector on rear XX = Manufacturing modification: none FX01 = 2x 100FX - multimode, 1300nm, ST FX01 = 2x 100FX - multimode 1300nm, ST TX01 = 2x 10/100TX RJ45 TX01 = 2x 10/100TX RJ45 FG50 = 2x 1000LX SFP - Blank (no optical transceiver) 1FG50 = 1x 1000LX SFP - Blank (no optical transceiver)