7 Messages
No Ranging Response Received T3 timeout
I noticed that the lights in my new Arris SB8200 were all green, when the manual says they are supposed to be blue if the modem Is set up as DOCSIS 3.1 (as it should, since it is compatible). Not knowing what I would find I logged into the modem, I see a lot of errors under "Corrected" and "Uncorrectables". I have attached images. Then in the Event log page, I see this error "No ranging response T3 timeout" appear roughly every 2 hours.
Can someone please help!!
I have tried to upload images but I get an error to PLEASE TRY AGAIN. My images are all either TIFF or JPEG and less than 1 MB, so I am not sure why this is happening.
EG
Expert
•
106.9K Messages
1 month ago
Copy all of the text of them (instead of using an image) and paste it into your next post here, but you'll need to redact all of the CM MAC and CMTS MAC addresses. The bot will not allow your post to be seen publicly.
Please also copy all of the text in its entirety of the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers and paste them as well.
3
0
EG
Expert
•
106.9K Messages
1 month ago
Everything was within specs at that snapshot in time, but the error log entries confirm 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 signal stats.
You should get a reply here in your topic. Good luck !
(edited)
3
0
EG
Expert
•
106.9K Messages
23 days ago
@user_get27r @XfinityThomasD
Please circle back here and post any possible solutions for the issue here in these open public forums so that all readers here may benefit from the exchange / info. This is in keeping with the spirit for which these public help forums were originally intended. Thank you.
3
0