3 Messages
Critical (3) No Ranging Response received - T3 time-out
Moved into a new property and I have the Motorola MB8611 Cable Modem. The service runs fine for about 20-30 minutes and then I get a "Time Not Established | Critical(3) | No Ranging Response Received - T3 time-out" error on my modem and it reboots at which point I have 90 seconds of downtime. This is really impacting my ability to WFH. What could potentially be the problem here? How could Xfinity assist with this issue?
Output from Modem:
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EG
Expert
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111.5K Messages
2 years ago
The line / signal status values were all OK at that snapshot in time. Please also post those modem RF error log entries in their entirety (copy and paste all of the text) but redact the CM and the CMTS MAC addresses for your privacy or else the forum bot will not allow your post to be seen publically.
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user_3a1d0b
3 Messages
2 years ago
Hey @EG , thanks for getting back to me so swiftly and for offering your advise on this issue. I have attached below this mornings connection plane as well as the event logs that you requested. I have removed the MAC Address Fields in the errors.
Connection
Mon Aug 14 2023
Mon Aug 14 2023
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EG
Expert
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111.5K Messages
2 years ago
FWIW, be advised that we have been seeing many posts here lately that indicate a pattern that the 8611 is currently not playing nicely with the Comcast system / firmware.
That said. The signal status values are still OK but the error log entries indicate that something is going on. Perhaps there is noise ingress into the line(s) / an upstream channel / return path impairment somewhere.
There are other signal stat values 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 (The Digital Care Team) who are available to these boards. They will be able to poll the CMTS (Cable Modem Termination System) to check for any real-time degradation and / or error reports, see your node / cable plant, and modem health, and see whether or not everything is in the green zone. They can also see a history plot for the modem and check those upstream receive stats.
You should get a reply here in your topic. Good luck !
(edited)
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CC_Tony
Retired Employee
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1.4K Messages
2 years ago
@user_3a1d0b Thank you for your post! We can definitely look into your signal to see what is going on. Can I get you to use the Direct Messaging icon in the upper-right and send a message to "Xfinity Support"? We'll meet you there!
@EG, thank you for the summon. We always appreciate your knowledge and your willingness to help.
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EG
Expert
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111.5K Messages
2 years ago
@XfinityTony
My pleasure Tony !
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