Digikey Null Modems (search for “null modem”): www.digikey.com
“Greater Scroll of Console Knowledge”, David K. Z. Harris: www.conserver.com/consoles
Radio Shack Null Modem part numbers: #26–1496 (25-pin) 26–264 (9-pin)
Remote Serial Console HOWTO, Glen Turner and Mark F. Komarinski: www.tldp.org/HOWTO/Remote-Serial-Console-HOWTO/index.html
The serial-console.txt File in Kernel Documentation, Miquel van Smoorenburg: www.kernel.org/pub/linux/kernel/v2.4/linux-2.4.22.tar.bz2
Serial Port HOWTO, David S. Lawyer and Greg Hankins: www.tldp.org/HOWTO/Serial-HOWTO.html
Serial Port Pinouts and Information, Celeste and Peter Stokely: www.stokely.com/unix.serial.port.resources