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 D = DIN Rail Mounting xx = none XX = Manufacturing modification: none ML-ML = 2 x 100FX - Multimode 1300nm, LC connector L2 = 1 x 100FX - Singlemode 1310nm, LC connector, Standard 20km