Originally Posted by
500N
Pjm
If I turn off my phone and am international, it sounds like you are connecting to it when you dial the number so it still rings to the caller.
Probably the same reason there is (or was) a dial tone so the person dialling doesn't just get "nothing" until they become connected which would make them think that they have been disconnected whilst waiting for the international exchanges to actually find the phone & then make the connection.