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The word telegraph (from Ancient Greek: τῆλε 'at a distance' and γράφειν 'to write') was coined by the French inventor of the semaphore telegraph, Claude Chappe, who also coined the word semaphore. [2] A telegraph is a device for transmitting and receiving messages over long distances, i.e., for telegraphy.
The Internet is a worldwide network of computers and computer networks that communicate with each other using the Internet Protocol (IP). [91] Any computer on the Internet has a unique IP address that can be used by other computers to route information to it. Hence, any computer on the Internet can send a message to any other computer using its ...
A telephone line or telephone circuit (or just line or circuit industrywide) is a single-user circuit on a telephone communication system. [1] It is designed to reproduce speech of a quality that is understandable. [ 2 ]
Many electrical telegraph systems were invented that operated in different ways, but the ones that became widespread fit into two broad categories. First are the needle telegraphs, in which electric current sent down the telegraph line produces electromagnetic force to move a needle-shaped pointer into position over a printed list.
Preece had become convinced of the idea through his experiments with wireless induction. However, the backing was withdrawn when Marconi formed the Wireless Telegraph & Signal Company. GPO lawyers determined that the system was a telegraph under the meaning of the Telegraph Act and thus fell under the Post Office monopoly. This did not seem to ...
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]
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 ...
A telegraph code is one of the character encodings used to transmit information by telegraphy. Morse code is the best-known such code.Telegraphy usually refers to the electrical telegraph, but telegraph systems using the optical telegraph were in use before that.