Asynchronous terminal server16 RS-232/422/485 ports, 2kV optical isolation, 88 to 300 VDC power supply, extended temperatures -40 to 85°C, 2 10/100Mbps RJ45 ports, LAN redundancy and COM function, 15 KV ESD protection, RADIUS authentication, Real COM/TTY drivers for Windows and Linux, IP30 enclosure