The history of the telephone, was invented in 1870 by Alexander Graham Bell. In 1877, construction of the first regular telephone line from Boston to Somerville, Massachusetts was completed. The first Bell telephone company started in 1878. This is now known as the American Telephone and Telegraph Company (AT&T), which was incorporated in 1885. After Exchanges and Rotary Dialing was the payphone, then touch tone phones, and the cell phones.
Borth, David. (2012) Encyclopedia Britannica Facts Matter: Telephone. Retrieved on September 12, 2012, from http://www.britannica.com/EBchecked/topic/585993/telephone
This article describes the functional components of the modern telephone and traces the historical development of the telephone instrument. In addition it describes the development of what is known as the public switched telephone network (PSTN).
Farley, Tom. "Telephone History Series." TelephoneWriting.com, A Tom Farley Production, West Sacramento, CA. Rev. 1 Dec. 2001. Retrieved on September 13, 2012, from http://www.privateline.com/index.html A site for everything about the history of the telephone, including who invented it, how it works, switchboards, electricity, pictures and references.
Eby, Chuck. "Telephone History Website." Antique Telephone Collectors Association. Rev. 1 Oct. 2001. Retrieved on September 16, 2012, from http://www.atcaonline.com/phone/index.html
This web site has information about collecting and repairing old telephones. I used this information about how the telephone changed, which inventions came from the telephone, and some of the pictures.