Just a quick one. Have a client with an old Norstar Compact Plus system. Not familiar with it myself but one of their handsets has stopped working. It's a T7316E, so easy enough to get a replacement. My question is: when the replacement phone is connected (to the same socket as the original handset) will it pick up the previous handsets settings from the ccu (speed dials, programmed buttons , etc) or will it need to be re-programmed manually?