When you say that you proved the problem to the C.O. are you saying that the tech in the C.O. actually got the failure at the frame or are you saying you got the failure at the demarc? I never ran across an intermittent Caller ID being caused by the switch, although my experience has been limited to DMS & 5E. I strongly suspect the local loop.
Use a basic (cheap) Caller ID box to prove things at the demarc. That is what the phone company tech will use. Iif he doesn’t get a failure on his set, he probably going to give the problem back to you. Good luck.
