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The downstream stats are good. What do the upstream power levels look like ?
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The upstream power is good as well but the error log entries indicate that something is going on. Perhaps there is noise ingress into the line(s) somewhere.
There are other signal stat figures that can't be read by the modem. They are the "Upstream Rx Power" (Upstream Receive Power Level), the "Upstream SNR Ch." (Upstream Signal To Noise Ratio), and the "Upstream ICFR" (In Channel Frequency Response). These are as equally important in diagnosing connectivity issues as are the modem's stats.
I'm going to escalate your issue to the Comcast corporate employees that are available to these boards. They will be able to poll the CMTS to see whether or not everything is in the green zone, see your node / cable plant and modem health, and also see a history plot for the modem. You should get a reply here in your topic. Good luck !
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@dwang953 wrote:
I was thinking of buying a new modem with more channels/RAM to just test and rule out the modem as an issue, but don't feel that the issues I have observed necessarily support the hypothesis that the modem is at fault?
Anything is possible but looking at those RF signal errors, it is much more likely to be a line / connection quality impairment rather than a modem hardware issue.
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Hello dwang953. We appreciate you visiting and posting on our Forums. I can assist with further troubleshooting your internet speed / connectivity issues. Please reach out to me via private message and include your full name so I can assist you. To send a private message: click my name (ComcastJoeTru) to view my profile. Then click the link that says "Send a message" and there you can private message me.
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