Can you plug phones directly into the ksu with line cords and test?? You might have a modular plug on your station wiring that is shorted. Shorted mod plugs can do all sorts of things. I dont think it is a programming issue. I have installed many of these without these kind of issues. You might have a bad KSU.

Hodgkin's Lymphoma Survivor! Took a step 20 years back in time. Managing the VHF radio network for the Florida Forest Service. Caloosahatchee District 17.