Ah, yes, the acoustic coupler.
I admit I never had to use a 110 baud modem. My first was a 300 acoustic coupler.
but since all we were sending was straight text, it worked okay.
Can you imagine sending a .gif file at 300 baud? Whew!
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The cheaper the paper, the more important the information. Peter Lynch.
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Price is a crazy and incalculable thing, while Value is an intrinsic and indestructible thing. G.K. Chesterton