That shared phone line will continue to work in your existing phone system as usual for receiving incoming phone calls and for making outgoing phone calls. However, it will also now ring on your phones when there is a door entry call from your outdoors doorphone and will support intercom conversation with the doorphone as well.

The door entry system will not affect any service available on your phone line from the local phone company, like caller ID, call waiting, etc., except for internet. If you have one single phone line and need a door entry system that is also 100% compatible with internet use of the line, see the PhoneBell Q-10 system.

With a wireless phone system, the door entry Controller need only be connected to the base station of the wireless system. The Controller will feed the phone line to that base station from its remote location at the home Telephone Interface Block.