RUGGEDCOM RS900NC is a 9-port, industrially hardened, fully managed Ethernet switch with 56-bit encryption supporting 6 Fast Ethernet RJ45 ports and up to 3 Fast Ethernet Fiber ports available over multiple fiber connector types and distances. HI = 88-300 VDC or 85-264 VAC XX = No power supply 2 N = No Mounting Hardware xx = none XX = Manufacturing modification: none TX-TX = 2 x 10/100TX, MT = 1 x 100FX - Multimode 1300nm, ST connector