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Puebla Travel on D.INDEPENDENT SCHOLAR AT&T ALEXANDER GRAHAM BELL, Gardiner Hubbard, and Thomas Sanders founded the Bell Telephone Company, later known as the American Telephone and Telegraph Corporation, in 1877. Bell was the telephone inventor, Hubbard and Sanders were the men who financed his work. The first telephone exchange was opened in New Haven, Connecticut, in 1878; within three years, telephone exchanges existed in most major cities in the UNITED STATES.
The American Telephone and Telegraph Company was created with the charter to provide long-distance telephone service.
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The first lines were built between New York and Chicago and were completed in 1892. AT&T's long distance telephone system was extended from coast to coast when San Francisco was added in 1915.
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