Consistent Packet loss (25% or more) for six months, extremely disappointed

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.