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Telecommunication technologies presented as cell phone and other wireless applications, are powerful tools to break the barriers of time and space. With the introduction of high-bandwidth, digital communication technologies, it is possible to deliver audio, video, and waveform data to wherever and whenever needed for low cost.
With rapid development of the filed, 3 type of application can be found depend on technology. The first generation wireless mobile communications are totally based on weak analog signal. The second-generation network is based on low-band digital data processing. New and popular third-generation (3G - the common name) wireless technology represents collection of various 2G wireless systems into one global system that includes both terrestrial and satellite components.
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