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by Slartie 1482 days ago
> Pay phones mitigated this in a low tech way - by software muting the handset.

So does this mean that there was a dedicated second microphone hidden somewhere within the payphone body, that would continue to record the sound the coins made?
2 comments
genewitch 1482 days ago
The coins weren't recorded, it was just a short tone that indicated 5ยข. A quarter was five quick tones. A dime two.

I used to mess with the proctor test set (dialing 117 in the US at least on GTE) and only ever convinced it I inserted a nickel even with many tries using a digital recorder or a computer speaker.

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baobrien 1482 days ago
In early 3-slot North American payphones, there literally was a bell that the coins struck and a transducer inside the payphone body.
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