General Operating system : Windows® 2000 AC power input : 250W4@115/230 VAC, 50/60Hz Physical Width : 17.6" (447 mm) - fits 19'' standard rack Height : 1RU, 2RU or 4RU platforms Depth : 27" (685 mm) Weight 35 lbs (16 kg) Operating Environment Temperature : 50º-95º F (0º-35º C) Humidity : 8% - 80% RHNC Data Communications DVB ASI - 75 .BNC connector Max send : +5V, 220 mA Typical send : +12V, 7.5 mA / -12V, 7.2   mA Max bitrate : 270 Mbps Typical bitrate : 250 Kbps RS-422 - Single channel synchronous HDLC Sync clock rate : 250 Kbps (configurable) Typical bitrate : 120 Kbps 10/100 BaseT Ethernet : RJ-45 connection Modem : 56k internal (optional) USB : Two USB ports