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Telegraph Key And Sounder

Colour photograph of a telegraph key and sounder mounted on a wooden platform.

Source: Russ Milland

Date: 2010

Telegraph keys produce the “dots” and “dashes” used in Morse Code to send the characters in a message to others on the network. The Sounder turns the electrical signals into an audible sound to allow the telegraph operator to hear the dots and dashes and write the message accordingly.