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Telegrafia reprezintă modul de transmitere a informațiilor prin impulsuri nemodulate, folosind un anume cod. Cel mai cunoscut cod este cel propus de Samuel Finley Breese Morse (1791-1872), în anul 1838, cod cunoscut în România sub denumirea de „ alfabetul Morse ".
A telegraph is a device for transmitting and receiving messages over long distances, i.e., for telegraphy. The word telegraph alone generally refers to an electrical telegraph. Wireless telegraphy is transmission of messages over radio with telegraphic codes.
16 wrz 2024 · Telegraph, any device or system that allows the transmission of information by coded signal over distance. The term most often refers to the electric telegraph, which was developed in the mid-19th century and for more than 100 years was the principal means of transmitting printed information.
From 1845, after Morse’s invention and the transformations brought about by Vail, the telegraph became widespread throughout Europe. Many countries undertook to improve and readjust the...
9 lis 2009 · The telegraph and Morse code revolutionized long‑distance communication after their invention in the 1800s by Samuel Morse and other inventors.
2 kwi 2019 · Ezra Cornell built more telegraph lines across the United States, connecting city with city, and Samuel Morse and Alfred Vail improved the hardware and perfected the code. Inventor, Samuel Morse lived to see his telegraph span the continent, and link communications between Europe and North America.
11 paź 2013 · The Chappe semaphore telegraph consisted of a series of towers topped with three rotating arms or panels that could be moved into nearly 200 standard positions, each assigned a unique value or ...
