null modem cable


Also found in: Acronyms.

null modem cable

[¦nəl ′mō‚dem ‚kā·bəl]
(computer science)
A cable that connects two local computers via serial ports without the use of a modem.

null modem cable

An earlier RS-232 cable used to connect two computers in close proximity for file transfer. In style before the USB interface came out, a null modem cable attached to the serial ports of both machines. By crossing the sending wire with the receiving wire, it simulated analog modems and the public phone network. A counterpart cable was also available that used the parallel port for higher transfer speed. See Laplink cable. See also crossover cable.