A mobile phone. The mobile phone system is up and running, start the first Chicago. About 20 years ago, called the AMD system (AMPS) PS or mobile systems version 1 (First Generation-1G) or 1G, and there is contact between the mobile station and base station using the MFC fadi El (FDMA-Frequency Division Multiple Access), speech signal is sent by the analog. In addition to the AMD system PS, there is also a system of Europe is n m t (NMT) of Scandinavian and one (TACS).
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