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The word telegraph alone generally refers to an electrical telegraph. Wireless telegraphy is transmission of messages over radio with telegraphic codes. Contrary to the extensive definition used by Chappe, Morse argued that the term telegraph can strictly be applied only to systems that transmit and record messages at a
In countries that had a PTT unit of government, typically the vast majority of forms of distribution of information fell under the auspices of the PTT, whether that be the delivery of printed publications and individual letters in the postal mail, the transmission of telephonic audio, or the transmission of telegraphic on-off signals, and in some countries, the broadcast of one-way (audio ...
DOT-DASH TO DOT.COM: How Modern Telecommunications Evolved from the Telegraph to the Internet (Springer, 2011) Wu, Tim. The Master Switch: The Rise and Fall of Information Empires (2010) Lundy, Bert. Telegraph, Telephone and Wireless: How Telecom Changed the World (2008)
In 1876, Alexander Graham Bell invented the telephone. After 1920 it replaced the telegraph as the primary means of communication between cities. As the telegraph was eventually supplanted, it paved the way for the development of modern communication systems and revolutionized the way people communicate over long distances. [16]
Call originator - (or calling party, caller or A-party) a person or device that initiates a telephone call by dialling a telephone number.; Call waiting - a system that notifies a caller of another incoming telephone call by sounding a sound in the earpiece.
Bell's original consent agreement limited it to international dial telephony, and the Western Union Telegraph Company had given up its international telegraphic operation in a 1939 bid to monopolize U.S. telegraphy by taking over ITT's postal, telegraph and telephone service (PTT) business. The result was a de-emphasis on telex in the U.S. and ...
Telephony (/ t ə ˈ l ɛ f ə n i / tə-LEF-ə-nee) is the field of technology involving the development, application, and deployment of telecommunications services for the purpose of electronic transmission of voice, fax, or data, between distant parties.
Telegraph (and telex) charged per word sent, so companies which sent large volumes of telegrams developed codes to save money on tolls. Elaborate commercial codes which encoded complete phrases into single words were developed and published as codebooks of thousands of phrases and sentences with corresponding codewords.