said by mario02423:Dang, signal levels are absolutely fine.
FWIW, there is yet another important signal stat to take in to consideration when troubleshooting connectivity issues. It is called the uSNR (upstream Signal to Noise Ratio) and it is not, and can not be displayed by the modem. It can only be read from their end by them polling the local CMTS (Cable Modem Termination System). An end user can call in and ask a rep what this figure is. It should be at least 30 dB, and the higher the better. There may be a noise ingress issue in only the upstream channel / return path.