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Developed beginning in the 1830s, a telegraph line was a person-to-person text message system consisting of multiple telegraph offices linked by an overhead wire supported on telegraph poles. To send a message, an operator at one office would tap on a switch called a telegraph key , creating pulses of electric current which spelled out a ...
Wireless Telegraphy Act is (with its variations) a stock short title used for legislation in the Republic of Ireland, South Africa and the United Kingdom relating to wireless telegraphy. The Wireless Telegraphy Acts are laws regulating radio communications in the United Kingdom .
The Plessey Company, subsequently Siemens Plessey Systems and then a constituent part of BAE Systemsm was appointed prime contractor and system design authority for Ptarmigan in 1973, with responsibility for engineering development of the complete system. The initial development programme was followed by a series of production contracts worth ...
The electric telegraph was slower to develop in France due to the established optical telegraph system, but an electrical telegraph was put into use with a code compatible with the Chappe optical telegraph. The Morse system was adopted as the international standard in 1865, using a modified Morse code developed in Germany in 1848. [1] The ...
In 1908, students at Columbia University formed the Wireless Telegraph Club of Columbia University, now the Columbia University Amateur Radio Club. This is the earliest recorded formation of an amateur radio club, collegiate or otherwise. [7] In 1910, the Amateurs of Australia formed, now the Wireless Institute of Australia. RMS Titanic (April ...
A telegraph system consisted of two or more geographically separated stations linked by wire supported on telegraph poles. A message was sent by an operator in one station tapping on a telegraph key , which sent pulses of current from a battery or generator down the wire to the receiving station, spelling out the text message in Morse code .
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The following outline is provided as an overview of and topical guide to telecommunication: . Telecommunication – the transmission of signals over a distance for the purpose of communication.