If I am understanding this correctly it sounds like you have a bad splice inside the wall. This could be damaged from a water leak, or could just be open and touching a pipe and picking up noise.

Or you might not have a splice , but just have gotten a screw put through the cable.

Easiest way out? Use the White green for DT and don't look back. Need more then one pair? Abandon the defective jack and run a new cable from the demarc over to where you need it.

Don't sweat the small stuff. Life is too short.

Sam


"Where are we going and why are we in this hand basket?"