A wireless communications protocol being used by many law enforcement agencies for mobile computer communications.

A wide-area, wireless data networking technology. CDPD is an open standard for using existing cellular networks for wireless data transmission. Packets of data are sent along channels of the cellular network.

A contention-based packet access scheme for analog cellular channels. CDPD transmits and receives digital data using idle analog cellular channels.

An enhanced packet overlay on analog cell phone networks used to transmit and receive data. This technology allows data files to be broken into a number of packets and sent along idle channels of existing cellular voice networks. CDPD provides 19.2 Kbps and is deployed by AT&T among several other carriers.

Cellular Digital Packet Data (CDPD) uses unused bandwidth normally used by AMPS mobile phones between 800 and 900 MHz to transfer data. Speeds up to 19.2 kbit/s are possible.