Cellular Digital Packet Data technology is used by telecommunications carriers to transfer data to users via unused analog cellular networks. If one part of the network -- a specific geographic area or "cell" -- is overused, CDPD can automatically reallocate network resources to handle extra traffic.

CTIA

The Cellular Telecommunications & Internet Association is the international organization that aims to represent all elements of wireless communication -- cellular, personal communications services, enhanced specialized mobile radio and mobile satellite services -- and serve the interests of service providers, manufacturers and others.

EDGE

Enhanced Data rates for GSM Evolution -- this 3G technology allows wireless transmission of data at speeds up to 384K bit/sec. It's based on GSM technology and allows for high-bandwidth services such as multimedia. It has more support in North America than in other areas where technologies such as CDMA2000 and UMTS may be favored.