Intercom system likely provides the door chime as well. 22/4 run to the front door.
May need a doorbell replacement.
You can extend the 22/4 from the Master Station to another location as needed (with a buried splice), or more properly run new cables.
TB A+ Partner Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense. -Buddha
