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2. History of the telephone - Wikipedia

   en.wikipedia.org/wiki/History_of_the_telephone

   Alexander Graham Bell was awarded the first U.S. patent for the invention of the telephone in 1876. Elisha Gray, 1876, designed a telephone using a water microphone in Highland Park, Illinois. Tivadar Puskás proposed the telephone switchboard exchange in 1876. Thomas Edison invented the carbon microphone which produced a strong telephone ...

3. Telephone - Wikipedia

   en.wikipedia.org/wiki/Telephone

   An old rotary dial telephone. AT&T push button telephone made by Western Electric, model 2500 DMG black, 1980. A telephone, colloquially referred to as a phone, is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be easily heard directly. A telephone converts sound, typically ...

4. Model 500 telephone - Wikipedia

   en.wikipedia.org/wiki/Model_500_telephone

   The successor to the model 302 telephone, the model 500's modular construction compared to previous types simplified manufacture and repair and facilitated a large number of variants with added features. Touch-tone service was introduced to residential customers in 1963 with the model 1500 telephone, which had a push-button pad for the ten digits.

5. Push-button telephone - Wikipedia

   en.wikipedia.org/wiki/Push-button_telephone

   A push-button telephone is a telephone that has buttons or keys for dialing a telephone number, in contrast to a rotary dial used in earlier telephones.. Western Electric experimented as early as 1941 with methods of using mechanically activated reeds to produce two tones for each of the ten digits and by the late 1940s such technology was field-tested in a No. 5 Crossbar switching system in ...

6. Motorola DynaTAC - Wikipedia

   en.wikipedia.org/wiki/Motorola_DynaTAC

   LED or vacuum fluorescent display. Data inputs. Push-button. Made in. USA. Electrical engineer Martin Cooper of Motorola made the first publicized handheld mobile phone call on a prototype DynaTAC model on April 3, 1973. This is a reenactment in 2007. The DynaTAC is a series of cellular telephones manufactured by Motorola from 1983 to 1994.

7. History of the telephone in the United States - Wikipedia

   en.wikipedia.org/wiki/History_of_the_telephone...

   Large local businesses and upscale customers were the first target, in an era when a dollar a day was good pay for a worker. In one of the first newspaper ads for the new telephone, the Bell Telephone Association stated: "The terms for leasing two telephones for social purposes connecting a dwelling house with any other building will be $20 a ...