NATS 1700 Lecture Notes - Lecture 4: Wireless Telegraphy, Invention Of The Telephone, Samuel Morse
9 Sep 2016
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Nats 1700 lecture 4 communications networks: telegraphs, the victorian internet . Electric telegraphs were popularized in mid-19th century although there were earlier. Versions of this technology (18th c. semaphore system line of sight communications - in france) Inventor of first telegraph was samuel morse (1844) device soon became popular all over globe. Before telegraph, most people relied on postal system to communicate, which meant sending a letter that could take days, weeks, and even months to get to its final destination. Carey (2009): telegraph first system to separate communications from transportation, as the movement of messages was no longer constrained by geography (think of limits of sending message by foot, horseback or rail) Originally, telegraphs were developed to solve problems in railway industry. To avoid disasters like train collisions, engineers constructed an electrical communication system beside the tracks that could be used by signalmen. Telegraph messages were sent across distances using system called morse code.
