

That’s a really clever answer to the ringer light! I should definitely be able to piece something together from there.
It also hadn’t occurred to me to just tap the phone itself for the voltmeter (though it feels a little less authentic than doing the line between them, somehow). It’s very good to know about the voltage tolerance - I’ll see what I can find!
Thank you very much for your help, I really appreciate it!
The belief in natural heirachies is baked into everything they do.