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- Cellular_digital_packet_data abstract "Cellular Digital Packet Data (CDPD) was a wide-area mobile data service which used unused bandwidth normally used by AMPS mobile phones between 800 and 900 MHz to transfer data. Speeds up to 19.2 kbit/s were possible. The service was discontinued in conjunction with the retirement of the parent AMPS service; it has been functionally replaced by faster services such as 1xRTT, EV-DO, and UMTS/HSPA.Developed in the early 1990s, CDPD was large on the horizon as a future technology. However, it had difficulty competing against existing slower but less expensive Mobitex and DataTac systems, and never quite gained widespread acceptance before newer, faster standards such as GPRS became dominant.CDPD had very limited consumer products. AT&T Wireless first sold the technology in the United States under the PocketNet brand. It was one of the first products of wireless web service. Digital Ocean, Inc. an OEM licensee of the Apple Newton, sold the Seahorse product, which integrated the Newton handheld computer, an AMPS/CDPD handset/modem along with a web browser in 1996, winning the CTIA's hardware product of the year award as a smartphone, arguably the world's first. A company named OmniSky provided service for Palm V devices. Cingular Wireless later sold CDPD under the Wireless Internet brand (not to be confused with Wireless Internet Express, their brand for GPRS/EDGE data). PocketNet was generally considered a failure with competition from 2G services such as Sprint's Wireless Web. After the four phones AT&T Wireless had sold to the public (two from Panasonic, one from Mitsubishi and the Ericsson R289LX), AT&T Wireless eventually refused to activate the devices.Despite its limited success as a consumer offering, CDPD was adopted in a number of enterprise and government networks. It was particularly popular as a first-generation wireless data solution for telemetry devices (machine to machine communications) and for public safety mobile data terminals.In 2004, major carriers in the United States announced plans to shut down CDPD service. In July 2005, the AT&T Wireless and Cingular Wireless CDPD networks were shut down. Equipment for this service now has little to no residual value.".
- Cellular_digital_packet_data wikiPageExternalLink showthread.php?tid=393.
- Cellular_digital_packet_data wikiPageExternalLink et.html.
- Cellular_digital_packet_data wikiPageExternalLink cdpd.
- Cellular_digital_packet_data wikiPageID "7331".
- Cellular_digital_packet_data wikiPageRevisionID "586979144".
- Cellular_digital_packet_data hasPhotoCollection Cellular_digital_packet_data.
- Cellular_digital_packet_data subject Category:Mobile_telecommunications.
- Cellular_digital_packet_data type Artifact100021939.
- Cellular_digital_packet_data type Instrumentality103575240.
- Cellular_digital_packet_data type Medium106254669.
- Cellular_digital_packet_data type MobileTelecommunications.
- Cellular_digital_packet_data type Object100002684.
- Cellular_digital_packet_data type PhysicalEntity100001930.
- Cellular_digital_packet_data type Telecommunication106271778.
- Cellular_digital_packet_data type Whole100003553.
- Cellular_digital_packet_data comment "Cellular Digital Packet Data (CDPD) was a wide-area mobile data service which used unused bandwidth normally used by AMPS mobile phones between 800 and 900 MHz to transfer data. Speeds up to 19.2 kbit/s were possible. The service was discontinued in conjunction with the retirement of the parent AMPS service; it has been functionally replaced by faster services such as 1xRTT, EV-DO, and UMTS/HSPA.Developed in the early 1990s, CDPD was large on the horizon as a future technology.".
- Cellular_digital_packet_data label "CDPD".
- Cellular_digital_packet_data label "CDPD".
- Cellular_digital_packet_data label "CDPD".
- Cellular_digital_packet_data label "Cellular digital packet data".
- Cellular_digital_packet_data label "蜂窝数字分组数据".
- Cellular_digital_packet_data sameAs CDPD.
- Cellular_digital_packet_data sameAs CDPD.
- Cellular_digital_packet_data sameAs CDPD.
- Cellular_digital_packet_data sameAs m.022kr.
- Cellular_digital_packet_data sameAs Q2744436.
- Cellular_digital_packet_data sameAs Q2744436.
- Cellular_digital_packet_data sameAs Cellular_digital_packet_data.
- Cellular_digital_packet_data wasDerivedFrom Cellular_digital_packet_data?oldid=586979144.
- Cellular_digital_packet_data isPrimaryTopicOf Cellular_digital_packet_data.