Video encyclopedia

Electrical telegraph


Invention of the Telegraph


Working of a Telegraph - Physics


How the Telegraph Changed Communication


How Does Morse Code Work?


Western Electric Telegraph Sounder. .

An electrical telegraph was a point-to-point text messaging system, used from the 1840s until better systems became widespread. It used coded pulses of electric current through dedicated wires to transmit information over long distances. It was the first electrical telecommunications system, the most widely used of a number of early messaging systems called telegraphs, devised to send text messages more rapidly than written messages could be sent.
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    • Other Russian inventions 

    • History 

    • Commercial telegraphy 

    • Telegraphy in war 

    • End of the telegraph era