Good for VGA monitor use. Computone RAS2000 family of Console Solutions starts with 4 ports and grows to 64. Any RS-232 connection to 921kbps guaranteed. Computone stands out for density, SSH security and ease of configuration. Cyclades makes Console Access devices, Terminal Servers, dialup servers, routers.
Site includes good white papers and tech talk.
Good information in their papers, tutorials, and application notes on topics like WAN, general networking, wireless, LAN, serial connectivity standards and cables. Lightwave Communications, Inc. manufactures ConsoleServer for centralized management of serial command console ports through direct network access, multiple terminals, and modem. Lightwave also manufactures a complete line of KVM devices and fiber optic extension systems. Network Technologies Inc. manufactures a complete line of switches, console switches, splitters and extension cables for sharing Sun, PC, and Macintosh computers. Raritan MasterConsole switch.