I think you are correct in that it is probably just an old protector. I have a side view and can see one of the terminals.
I could bypass it by disconnecting that line and running a new line to the kitchen. My current problem is that when I disconnect that line, I'm back to the hum caused by mj on the rest of the house (garage and alarm).
Regardless of whether the 2-line is connected or not, I am getting a hum on the kitchen phone. Connecting the 2-line phone with or without mj makes no difference.
Is it possible that the protector and mj are both causing interference that are canceling each other out on all phones except the kitchen (closet phone to the protector)?
