Contributor
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30 Messages
MB8600--uncorrecteds mounting and a connection drop today--modem or line problem?
During the past several months, have been noticing issues with my internet connection. Originally there seemed to be some signal issue in the area which was apparently corrected (I never contacted anyone about it), but I'm still finding the modem log is progressively adding uncorrecteds on all the channels. As the work I do requires reasonable latency, I'm not sure whether or not it's hurting anything (can't conclusively pin anything on it but I'm guessing it's not helping). Today at around 3:55pm (EST), modem disconnects altogether, no internet. Logged into the modem and see it just had the one channel up at that point. Whatever it was corrected itself about 5 minutes later (and added a few things into the log) but the modem never rebooted as the signal/errors log didn't get wiped. Not sure if this indicative of the modem itself (MB8600) going bad or a line problem somewhere. Coax goes from the modem to the wall plate and that goes out to the grounding block outside--no splitters or anything similar in between. I've rebooted the modem in the past and while the log will clear out, it eventually starts filling up the uncorrecteds again
Modem log:
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EG
Expert
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103.5K Messages
2 years ago
Even though the signal stats looked o/k at that snapshot in time, 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 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 can check the CMTS (Cable Modem Termination System) 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 poll for those upstream receive signal stats.
You should get a reply here in your topic. Good luck !
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XfinityAnthonyT
Official Employee
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1K Messages
2 years ago
Hey there, thanks for bringing this to our attention! I am happy to help you out. Please send a DM to XFINITY SUPPORT with your name and address for me.
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