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The Sound of the Dialup: an Example Handshake by Oona Räisänen (2500×1301px JPEG, cc-by-sa 3.0)

via [livejournal.com profile] dotaturls

A fascinating, annotated image of what a modem handshake (V.90, apparently) looks like when split up into frequences (is that called a spectrogram?), and what the individual bits mean.

A pity that my modem days were so long ago that I don’t really recall what the handshake sounded like; it would have been even more fun to correlate the sound I heard with the visual description in that image.

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pne: A picture of a plush toy, halfway between a duck and a platypus, with a green body and a yellow bill and feet. (Default)
Philip Newton

June 2015

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