Dial tones were always meant to be just a signal that the Caller has reached the Switch and there is an attempt to make the call happen. It was never meant to s

Dial tones were always meant to be just a signal that the Caller has reached the Switch and there is an attempt to make the call happen. It was never meant to synchronize with the actual Called party's phone. Fixed line phones simply get an electrical signal to make the phone "ring"