Agreed. I don't see it as a problem with your system. This is something that you will have to fight with your service provider over and it would help if you can duplicate the problem with a buttset connected to the demarc. That way your equipment is out of the picture and they can't finger point.

Good luck!

-Hal

CALIFORNIA PROPOSITION 65 WARNING: Some comments made by me are known to the State of California to cause irreversible brain damage and serious mental disorders leading to confinement.