said by Gyp Thompson :These are the same guys that were going to nuke the service without even knocking on the door and letting me know what was going on. Then I had to tell the guy to check all the cables to make sure they weren't the issue, but he didn't check the one coming from outside. I just don't see how a modem can do this.
Most cable companies will install a high pass filter on the line and let the service techs find the noise. Assuming upstream noise. They figure knocking on the door to tell a customer noise is coming from their residence will result in them getting told to get lost. Plus they are probably running noise all day.