RUGGEDCOM RSG2488 is a RuggedRated fully managed Ethernet switch 128-bit Encryption up to 28 non-blocking ports configured as 10/100/1000TX copper, 100FX or 1000SX fiber. Support six 4-port modules plus two 2-port modules Mixture of fiber optic or copper Gigabit ports with up to 28 Gig Ethernet ports 40 Cel. to +85 Cel. operating temperature (fanless) 48VDC (37-72VDC), screw terminal block 48VDC (37-72VDC), 19 Rack Mount Kit . Manufacturing modification none 4 x 10/100/1000Tx RJ45 4 x 10/100/1000Tx RJ45 4 x 10/100/1000Tx RJ45 4 x 1000LX - Singlemode, 1310nm, LC , 10km 4 x 1000LX - Singlemode, 1310nm, LC , 10km 4 x 1000LX - Singlemode, 1310nm, LC , 10km 2 x 1000LX SFP - Singlemode, 1310nm, LC, 10km 2 x 1000SX SFP - Multimode, 850nm, LC, 500m