The concept of the telephone dates back to the string telephone comprising two diaphragms connected by a taut string or wire. Sound waves are carried as mechanical vibrations along the string or wire from one diaphragm to the other
Alexander Graham Bell was a Scottish-born Canadian-American inventor, scientist, and engineer who is credited with patenting the first practical telephone. He also co-founded the American Telephone and Telegraph Company (AT&T) in 1885.
Telephone: Alexander Graham Bell along with Notable people included Antonio Meucci, Philipp Reis, Elisha Gray. Invented the concept of telephone. Which they thought communication can be made easy.