Here's a link that might help
Cragthorn said:
Are there known issues with Comcast cable modem service and gaming in general? I can't stay connected for anything. It's gotta be about the worst cable modem service I've ever had.
Cox in northern Virginia was switching from a dual-line analog to a single-line digital and during the entire time, about six months or so, the connection was horrid. Though there were moments of clarity, at which time my rank in Quake2 rose, the majority of the time ping increased beyond 500 and stayed there for longer than just rush hour. There were
many who complained, and Cox sent out people who tried observing the issue, but it seemed every time they did the problem wouldn't be all that bad. Ironic, but if they had told people what they were doing and what was going to happen there wouldn't have been as much problem. Businesses never, ever do that, however.
The site I used to find out a lot of information was
http://www.dslreports.com but I've long since forgotten my password and such there. The issue was well documented, after Media General sold it's system to Cox.