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Wireless telegraphy or radiotelegraphy is the 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.
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.
The term wireless has been used twice in communications history, with slightly different meanings. It was initially used from about 1890 for the first radio transmitting and receiving technology, as in wireless telegraphy, until the new word radio replaced it around 1920.
Telecommunication is a compound noun of the Greek prefix tele-(τῆλε), meaning distant, far off, or afar, [6] and the Latin verb communicare, meaning to share. Its modern use is adapted from the French, [ 7 ] because its written use was recorded in 1904 by the French engineer and novelist Édouard Estaunié .
1896: First practical wireless telegraphy systems based on Radio. See: History of radio. 1900: first television displayed only black and white images. Over the next decades, colour television were invented, showing images that were clearer and in full colour. 1914: First North American transcontinental telephone calling; 1927: Television.
The British Army first experimented with wireless equipment in a war theatre in 1899, when they had sent newly developed ‘portable wireless stations’ to the Boer War to establish wireless telegraph communications between the British forces encamped in that region. [31]
Telecommunications engineer working to maintain London's phone service during World War 2, in 1942. Telecommunications engineering is a subfield of electronics engineering which seeks to design and devise systems of communication at a distance.
A wireless network is a computer network that uses wireless data connections between network nodes. [1] Wireless networking allows homes, telecommunications networks , and business installations to avoid the costly process of introducing cables into a building, or as a connection between various equipment locations. [ 2 ]