The sound of a dialup modem, pictured
Communication protocol of a dialup handshake depicted with a spectrogram.
cross-posted from: https://sh.itjust.works/post/500500
cross-posted from: https://sh.itjust.works/post/319324
Source: https://www.windytan.com/2012/11/the-sound-of-dialup-pictured.html?m=1
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