[imurray]

> generating DTMF tones yourself and injecting them into the audio stream?

When I was an undergrad I had an audio file for each digit and a winamp playlist for each of my frequently dialed numbers. I'd hold my (landline) phone against the computer speakers and double-click the playlist to dial. I'm sure I spent more time setting this up than it ever saved, but it was somehow pleasing that this ridiculously over-powered speed dialer worked.

[gh02t]

Back in the days of phone line modems, there used to be a program that you could type in a number, the modem would emit the corresponding tones, and then you could pick up a phone and it'd already be connected. I can't remember what the one I saw was, but I'm sure there were multiple different ones, and I also vaguely recall there were dedicated physical machines that could before that.

[neckro23]

You could do this with any terminal program. Your modem won't emit any noise until it hears a carrier tone, so you could just dial, pick up the extension, hang up the modem.

[genewitch]

click. click. click-click-click-click-click-click-click.

...

...

PROCTOR TEST SET PLEASE SELECT TEST

LINE TEST PRESS 2

COIN RETURN TEST PRESS 3

COIN READER TEST PRESS 4

TONE TEST PRESS 5

ADDITIONAL TESTS PRESS 6

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this isn't the one i referenced, but proves my memory is functional https://youtu.be/uOO9dFiwzGk - actually it has references to what i typed