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Morse telegraph. Hughes telegraph, an early (1855) teleprinter built by Siemens and Halske. Electrical telegraphy is a point-to-point text messaging system, primarily used from the 1840s until the late 20th century. It was the first electrical telecommunications system and the most widely used of a number of early messaging systems called ...
Wireless telegraphy or radiotelegraphy is transmission of text messages by radio waves, analogous to electrical telegraphy using cables. [ 1 ][ 2 ] Before about 1910, the term wireless telegraphy was also used for other experimental technologies for transmitting telegraph signals without wires. [ 3 ][ 4 ] In radiotelegraphy, information is ...
Telegraphy. Telegraphy is the long-distance transmission of messages where the sender uses symbolic codes, known to the recipient, rather than a physical exchange of an object bearing the message. Thus flag semaphore is a method of telegraphy, whereas pigeon post is not. Ancient signalling systems, although sometimes quite extensive and ...
The telegraph represented a disruptive innovation in the history of the United States from its invention in the 1830s onward by quickly becoming a vital part of the nation's communication infrastructure. Its relative importance declined with the spread of telephones in the 20th century. Telegraph service permitted short texts to be sent cheaply ...
Telegram style, telegraph style, telegraphic style, or telegraphese[ 1] is a clipped way of writing which abbreviates words and packs information into the smallest possible number of words or characters. It originated in the telegraph age when telecommunication consisted only of short messages transmitted by hand over the telegraph wire.
1871: Practical duplex telegraphy system, allowing two messages to be sent over wire at the same time, one in each direction. 1872: Dallas, Texas reached by telegraph line. [115] October 1872: Australia is linked to the world system by a submarine telegraph line between Darwin and the Dutch East Indies (Indonesia).
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. A code consists of a number of code points, each corresponding to a letter of the ...
A telegraph is a device for transmitting and receiving messages over long distances, i.e., for telegraphy, which is the long-distance transmission of textual messages where the sender uses a semaphore system, known to the recipient.
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