A device that converts the computer's digital pulses to tones that can be carried over analog telephone lines, and vice versa. Prior to the turn of the century, analog modems used to be standard equipment on most desktop and all laptop computers. For more details, see modem
and analog telephone
. Contrast with digital modem
Three Decades Make a Difference
This analog modem from a Commodore 64 computer in 1982, which transmitted 300 bits per second (bps), is contrasted to an iPhone in 2012, capable of transmitting 20,000,000 bps and more.