Voicemail Invented in 1877?

When did voicemail first appear? You could argue it was in 1877.

On November 29, 1877, Thomas Edison demonstrated his invention, a hand-cranked phonograph that recorded sound on grooved metal cylinders. Edison shouted verses of "Mary Had a Little Lamb" into the machine, which played back his voice.

Soon after, Edison invented voicemail, in the sense that he sent a phonograph to a friend in England and they communicated by sending recordings back and forth over the Atlantic.

... David Ferris, with thanks to Mel Mandell

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