Điện thoại di động mạng lưới Radio P1
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Điện thoại di động mạng lưới Radio P1

During the first half of this century, the transmission of human voice through the telephone was the dominant means of communication next to telegraphy. Radio-supported mobile communication has constantly grown in importance during the last few decades and particularly the last few years to technical advances in transmission and switching technology as well as in microelectronics. Table 1.1 presents an overview of the chronological development of mobile radio systems. In contrast to wireline networks, mobile radio networks that comply with the wish for geographically unrestricted communication can be used anywhere where it is not economic or possible to install cabling....
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