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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.
Lucien Rouzet (23 March 1886 – 4 March 1948) was a French physicist and inventor, who, in 1912, created a wireless telegraph system. Biography [ edit ] Born on 23 March 1886 in Dieuze , a town situated in a part of France occupied by the Prussians since 1871, Rouzet moved to the Paris area as soon as he could.
Ptarmigan was a mobile, cryptographic digital and modular battlefield wide area network communications system based on the Plessey System 250 architecture. It was initially designed to meet the needs of the British Army of the Rhine in West Germany , and replaced the BRUIN system.
Before the discovery of electromagnetic waves and the development of radio communication, there were many wireless telegraph systems proposed and tested. [4] In April 1872 William Henry Ward received U.S. patent 126,356 for a wireless telegraphy system where he theorized that convection currents in the atmosphere could carry signals like a telegraph wire. [5]
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 ...
Pakistan Telecommunication Company Ltd., commonly known as PTCL (Urdu: پاکستان ٹیلی کمیونیکیشن کمپنی لمیٹڈ) is the national telecommunication company in Pakistan. [ 1 ] [ 3 ] PTCL provides telephone and internet services nationwide and is the backbone for the country's telecommunication infrastructure.
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.
The Wardenclyffe Power Plant prototype, intended by Nikola Tesla to be a "World Wireless" telecommunications facility.. The World Wireless System was a turn of the 20th century proposed telecommunications and electrical power delivery system designed by inventor Nikola Tesla based on his theories of using Earth and its atmosphere as electrical conductors.