Stupid suggestion, coming from someone who is hardly an expert on
intercoms...
Open the units and carefully examine the switch wiring. It's possible you'll
be able to figure out the difference between private and non-private.
NOT A STUPID QUESTION coming from someone that designed and
built intercoms before you were born.
>NOT A STUPID QUESTION
Who said it was????
You should really read any replies you get.
--
Geo