I would never rely on Caller ID, particularly for something like that. Modems have had callback for decades: call up, identify yourself, the connection is dropp

I would never rely on Caller ID, particularly for something like that. Modems have had callback for decades: call up, identify yourself, the connection is dropped and the system dials a stored number for that ID and the connection is set up for the session. https://en.wikipedia.org/wiki/Callback_(telecommunications)#Modem_security https://en.wikipedia.org/wiki/Callback_(telecommunications)#...