[cyberferret]

I was going to jump on this before I realised that (1) I have my phone on DND when I am 'running silent, running deep', and (2) I found out from the comments here that it doesn't work outside the US.

Perhaps to address both issues, there could be a version of this that doesn't actually make a physical call? Perhaps a pairing of an iOS/Android app to a button on the browser which send a standard in app message (free) to the phone associated with the button. The app could then simulate a ring tone, which would be enough to complete the illusion of an incoming call?

[FullMtlAlcoholc]

You can also use something like Google Voice or True Caller and block all other calls to your phone except for that one