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by denton-scratch
813 days ago
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> a simple mechanical acoustic coupler I get what you're saying, and I think that's plausible. But as far as I'm concerned, an acoustic coupler is/was a type of modem, into which you plugged an ordinary telephone handset. You had to have a telephone that had hemispherical mike and earphone; it didn't work with e.g. a trimphone. Expected performance: 9,600 bits-per-second. |
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lemme see if I can dig up a patent number for the channel switcher wheel and put this pondering to rest.
seems the inventing corporation is still around haha
https://avidproducts.com/2023/12/08/celebrating-70-years-of-...