Table: Moving Data Over The Airwaves
Some Promising Approaches TECHNOLOGY DESCRIPTION USES ADVANTAGES DISADVANTAGES CELLULAR Radio modems in Transferring files Available over Expensive NETWORKS laptops use cellular existing voice channels network CELLULAR Packets of data Short bursts of Price, speed, U.S. rollouts DIGITAL fill idle gaps in data such as reliability behind PACKET DATA cellular network messages schedule PRIVATE Private radio Bursts of data Nearly Expensive PACKET networks that nationwide for large RADIO transmit coverage transfers packets of data ENHANCED Digital radio Fleet dispatch, Combines Limited SPECIALIZED networks paging voice and data avail- ability MOBILE RADIO all-digital DATA: DATA COMMUNICATIONS, BUSINESS WEEK
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