Although the Telephone History, telegraph, and the telephone are wire-base electrical devices, Alexander Graham Bell is the one who developed them. However, the system could only transmit and receive one message at any time.
Bell’s deep understanding of the music and nature of sound allowed him to imagine the possibility of multiple messages being sent simultaneously over one wire. He believed that multiple notes could be simultaneously sent on one wire. Even though they might differ in pitch, no one had ever created one.
Talk to Electricity
Bell’s research proved so successful that he could tell Gardiner Greene Hubbard (Boston lawyer) about the possibility of a multiple-telegraph. Hubbard was angry at the Western Union Telegraph Companyâ€TM’s absolute control and saw the potential for breaking such a monopoly right away.
Although Bell worked on multiple telephones, Hubbard did not know about his plans to create a device to transmit voice electrically. Watson was also working on the harmonic phonograph. In March 1875, Bell had a secret meeting with Watson. Henry, the respected director at Smithsonian Institution, gave Henry encouraging words and encouraged Bell and Watson’s work.
In June 1875, they had accomplished their goal of creating an electric device that could transmit speech.
The Telephone Network Is Born
telephone service was established between Boston and Providence (Rhode Island). Telephone service between New York City and Chicago is establishing in 1892, and between Boston and Boston in 1894. Transcontinental service is establishing in 1915. 1 The following year, telephone service is establish between Boston (Rhode Island ). Telephone services between New York City, Chicago, and Boston are establish in 1892. Transcontinental service began in 1915.
Bell founded his Bell Telephone Company in 1877. As the industry grew, Bell purchased other companies. As a result, the American Telephone and Telegraph Co. was formed in 1880. This company was the predecessor to AT&T. AT&T had a de facto monopoly over the new industry because Bell owned all the patents behind the telephone system. However, it lost control of the U.S. market in 1984 when the U.S. Department of Justice forced it to surrender its state markets control.
Rotary Dialing and Exchanges
New Haven, Connecticut, 1878 was the site of the first telephone exchange.
Strowger is granting a patent in March 1891 for his first automatic telephone exchange. It replaced the button. Philadelphia was one of the last major cities to discontinue dual service (rotary/button).
William Gray was a Hartford resident who invented the coin-operated telephone in 1889. Payphones also overgrew along with the Bell System. 2
AT&T’s manufacturing subsidiary, Western Electric, used tones rather than pulses to trigger phone calls back in the 1940s. However, dual-tone multifrequency signaling, which uses the same frequency as speech to trigger telephone calls, was not commercially viable until 1963.
In the 1970s, the first cordless phone is inventing, 1986, the Federal Communications Commission grant cordless phones a frequency band of 47 to 49 MHz, and 1990, This frequency band was 900 MHz.
In 1994, digital cordless phones are introduces, 1994, digital cordless phones are the first introducing. It is now 5.8 GHz.
At&T launched the first mobile phone network in 1946. It is radio-control and meant to use in cars. It will slowly expand and become more sophisticated, but it is never widely adopted. Finally, in 1980, the first mobile networks are launch, first-time Telephone History.
Bell Labs starting research on the modern mobile phone network in 1947. Motorola released its first handheld cellular telephone in 1973.
History of Telephone books
The New Haven District Telephone Company published the first telephone book in February 1878. It contained 50 names and only one page. Operators were forbidden to list numbers. The book is dividing into four sections: Residential (professional), Essential Services, and Miscellaneous.
In 1886, Reuben H. Donnelly founded the first Yellow Pages-branded directory. It included business names and phone numbers. It listed business names and telephone numbers.
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