I realize this is over 3 years after the original post, but I have had similar connection problems. I've gone so far as replacing my router several times as well as the cable modem. I've made numerous calls to them to troubleshoot and they always insist the problem is on my end.

Well, just about a month ago, we got a notice that Cox was going to perform an "upgrade" and we'd be without service for a day.

The "upgrade" was performed and guess what? No more connection problems. Seems to me the problem was on their end all along.

I'll bet anything the "upgrade" wasn't actually an upgrade, but actually a fix to the problem. Too bad it took them over 2 years to fix it!

Once Verizon offers FIOS to our area, Cox will definitely be dumped.