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Evolution of wireless communication,electromagnetic waves, mobile phones, satellites, telecommunication

Evolution of wireless communication Communication between two  communications devices   can basically classified as   follows a. wired communication b. wireless communication           Our   focus is on only mobile phone and cell phone. Before mobile phone [wireless communication],   telephone came into existence. 1876 -telephone was invented by Alexander Graham bell 1881-in   Berlin   public telephone service was started [wired circuit switching network]. In early 18 century wireless communication was existing through optical medium. The wireless communication boomed only after invention of electromagnetic waves by Michael Farady. 1907-the first commercial transatlantic connection were setup using huge base stations. On both side. 1920-marconi discovery of short waves gets reflected ionosphere. This helps to sent wireless messages around the world bouncing at the ionosphere. 1926-the first telephone in a train was available on the Berlin Hamburg line. 1927-radio for cars w