Have you checked your cable modem signals and logs to confirm that your connection to the cable network is clean and stable? This is step 1 because if your cable network connection is no good, nothing else will help. There can be a lot of other problems but this is the first thing to check.
Could you please elaborate on what you mean when you say check my cable modem signals.
For some modems, you can get signals and logs by browsing to 192.168.100.1. For Panoramic someone else would have to give instructions. You're looking for things like high uncorrectable numbers,too-low downstream power, too-high upstream power, T3 timeouts, etc. It's a bit different on every modem but unfortunately this is something you need to know how to do in order to help Cox find the issue.
