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Telephones Designed For Talking Used For Just About Everything Communication is an essential element of human existence The transfer of information characterizes it The best way to illustrate this is to discuss the evolution of the telephone This extraordinary invention changed the way businesses are managed and the way people conduct their day to day lives Alexander Graham Bell patented the first telephone in 1876 Prior to his receiving the patent three men were working towards the same goal Antonio Meucci Alexander Graham Bell and Elisha Gray Both Gray and Bell were working on a telegraph system on which more than one message at a time could be sent over a single wire Gray declaring that instruments to convey the human voice were mere playthings decided he would concentrate on the more practical telegraph Continuing on in history the first manually switched commercial telephone exchange opened in 1878 Only 21 subscribers were connected The first automatic telephone switch was installed in 1892 until this time operators manned the switches around the clock In 1915 that first cross-country commercial line was formally opened between New York and San Francisco For a single voice exchange 6780 miles of copper wires 30000 telephone poles and two circuits were required On April 25 1935 the first message by ATT was transmitted around the world It took a quarter of a second for a single message to circle around the world now gigabytes of information travel the same distance in as much time Branching from the creation of the telephone were a number of other time-altering inventions The radio sending voice through the air without wires was developed in the 1890s In addition in 1927 the first commercial telephone serviced by radio between New York and London opened The walkie talkie developed in the late 1930s became one of the first practical applications of mobile communications This invention paved the path for the invention of the first mobile
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