Had something like this years ago. Kept having to have techs come out till one thought to check the pole. It turned out they had put some kind of filter on the lines what was the wrong kind and it was cutting the signal in and out.
Had something like this years ago. Kept having to have techs come out till one thought to check the pole. It turned out they had put some kind of filter on the lines what was the wrong kind and it was cutting the signal in and out.