Packet data, cellular digital (CDPD) of bandwidth usage that are typical for mobile phones AMPS at frequencies between 800 and 900 MHz can be used, for data transfer use. Speed up to 19.2 kbit/s, slightly higher than it might be.

in the 1990's development. CDPD is a technology for the future. However, it could hardly have with the system, more expensive and with lower speed Mobitex and DataTac competition. and never, completely common found, and the newer time standards, such as GPRS become more prominent.

CDPD customer a little bit. The company AT