The Teledoorbell System connects your entry door station to all the premise phones; this allows the door to be answered from any premise phone, without having to go to the door or intercom on the wall. It features Call Forwarding, that will connect your door station with your cell phone or another location without your visitor even knowing. Relay Control, to allow you to unlock the door remotely by pressing a few keys on your phone. Call Waiting, that will sound a tone when you are on another call, to notify you that someone is at the door and Caller ID/Distinctive Ring, to notify you that it is the entry door.