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The Fundamentals of Wireless Technology
At its simplest, wireless technology involves transmitting data between devices
that are not physically connected. These devices may be anything from a personal
digital assistant (PDA), to a laptop, a two-way \ pager, to a global positioning
satellite (GPS) antenna, to a remote sensor. The communication can occur at short
range using infrared technology, at a wider range using a high-speed wireless LAN
within a building, or at extraterrestrial distances using satellites.
Wireless technology aims to give mobile professionals and end users access to information
-- anywhere. It fosters information exchange and collaboration where physical co-location
is not feasible. Wireless technology has long aided in tracking, locating, and managing
valuable, movable assets such as cargo containers, laboratory equipment, and even taxicabs.
Wireless data systems use microwave radio frequencies to transmit signals over the air from
a transmission tower to a microwave receiver installed at the customer's home or business.
This system transmits from the central transmission point to the coverage area.
Because microwave signals are transmitted over the air, wireless data technology
does not require large networks of cable and amplifiers used by franchise cable
operators to deliver services.
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