No Ranging Response received - T3 time-out / Modem Rebooting

O/k, my bad, sorry. That's an 8 channel modem so there aren't any more. They are just labeled strangely (9 thru 16).... The stats are o/k. The error log entries, not so much.

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 !

Greetings, djjoshep! I appreciate you taking the time to reach out to us here on the forums. We hope you are having an amazing day. We apologize to hear of the issues you are running into with your modem rebooting. That's certainly frustrating with not having a reliable connection and would like to get this turned around for you. Can you please send us a PM with your first and last name so we may further assist you?

 

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