NationMaster - Encyclopedia: CDPD

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.

As of the year 2004, major carriers in the USA are threatening to shut down CDPD service. AT&T will give out no new IP addresses. The threatened shutdown has been delayed several times (the service has a number of entrenched users and no easy direct replacement exists).

External link

CDPD (http://www.wirelessready.org/nettech_cdpd.asp) from Wireless Ready Alliance

Results from FactBites:

Cellular digital packet data - Wikipedia, the free encyclopedia (253 words)
	Developed in the early 1990's, CDPD was large on the horizon as a future technology.
	As of the year 2004, major carriers in the United States are threatening to shut down CDPD service.
	As of July 2005, the former ATandT Wireless CDPD network is no longer active, and Cingular Wireless CDPD customers have been informed that as of the end of the year, it will be down as well.

Access the Internet with wireless CDPD (313 words)
	CDPD is the original wireless IP packet data standard, its definition was started in 1992 and the first commercial service was launched in 1995.
	CDPD communications are secure thanks to the encryption used and channel hopping, which make it extremely difficult to intercept and interpret a transmission.
	CDPD packets use forward error correction to reduce the effects of noise and RF interference on the data transmission.

More results at FactBites »

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