TT
Who ever makes it and the manufacture has changed twice in the last 10 years..
Viking and Harris come to mind.
What I am saying is that the door phone is on a ex. and not a call waiting feature like a default Chamberlain model and some vikings without the option removed.
It needs to go off hook on intercom dial tone and speed dial the group of stations assigned.
As Hal said, whatever.
The Door phone does not need to be program as a hot line. In fact, I have never programed one as a hot line and never will.
