What Does Bell 103 Mean?
The Bell 103, which was the first commercial computer modem, is an AT&T standard for asynchronous 300 bps full-duplex modems that use frequency-shift keying (FSK) modulation on dial-up lines. Developed in 1962, the Bell 103 modem facilitates digital data transmission at a speed of 300 bps over regular phone lines. It is a split-channel modem and is ideal for low-demand users that exchange PC files on a frequent basis.Bell 103 modulation is used in amateur radio, shortwave radio and commercial applications. Its use of audio frequency and low signaling speed makes it compatible with unreliable narrowband links.