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(Advanced Radio Data Information Service) The first wireless data network in the U.S. It was formed in 1983 by Motorola and IBM to support IBM field service technicians. ARDIS was later spun off as a commercial venture and grew to cover more than 11,000 cities and towns in the U.S., Puerto Rico and U.S. Virgin Islands. See DataTAC.


A low-speed wireless data technology developed by Motorola. Transmitting in the 800 MHz band at 19.2 Kbps, DataTAC was known for its ability to penetrate buildings better than higher-speed networks. DataTAC has been used for pagers, BlackBerry email and the technology behind the ARDIS network, created in 1983 for IBM field service technicians. In 1998, ARDIS merged with American Mobile Satellite to become Motient Corporation. In 2000, ARDIS took the name of its DataTAC network. DataTAC 4000 describes the U.S. public network. DataTAC 5000 is used in Europe, and DataTAC 6000 is implemented in Asia. See CDPD, Ricochet and Velocita Wireless.

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