India U.K U.A.E U.S MOBILES (Computers - Information Technologies)
Ad ID 33572 in Category: Computers - Information Technologies
India U.K U.A.E U.S MOBILES | |
Mobile Phone HistoryDigital wireless and cellular roots go back to the1940s when commercial mobile telephony began. Compared to today's furious pace of development, it may seem odd that wireless didn't come along sooner. There are many reasons for that. Technology, disinterest, and to some extent regulation limited early United States radio-telephone development. As the vacuum tube and the transistor made possible the early telephone network, the wireless revolution began only after low cost microprocessors and digital switching became available. And while the Bell System built the finest landline telephone system in the world, they never seemed truly committed to mobile telephony. Their wireless engineers were brilliant and keen but the System itself held them back. Federal regulations also hindered many projects but in Europe, where state run telephone companies controlled their own telecom development, although, admittedly, without competition, wireless came no sooner, and in most cases, later. Starting in 1921 in the United States mobile radios began operating at 2 MHz, just above the present A.M. radio broadcast band. [Young] These were chiefly experimental police department radios, with practical systems not implemented until the 1940s. [FCC] Police and emergency services drove mobile radio pioneering, with little thought given to private telephone use | |
| Related Link : Click Here (1 hit) Target Nation: All Nations Target City : All Cities Last Update : Aug 09, 2008 08:18:37 PM | Ad Owner Name: murugan Contact Phone: (None) Contact Email: muruganchipkali@yahoo.com Number of Views: 23 |
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