Intermittent internet loss - high number of correctables on one channel

... Netgear CM1150V ... 1173532 Correctable and 49694 Uncorrectable, with a 14 minute uptime ...

Ouch!

Problems like this are often due to poor coax connections or damaged coax cable, usually in or near your home. Running the cable through a surge protector, a defective splitter, or too many splitters can cause signal problems as well. If there is an amplifier in the line make sure it's getting power. 

If you want to troubleshoot this yourself, please see Internet Troubleshooting Tips. If you still need help, please post your Internet plan speed and the following information from your modem (from http://192.168.100.1):

• downstream: power levels, SNR (or MER), and error counts for all channels
• upstream: power levels for all channels
• complete event log, if available (Be sure to remove or blot out any MAC addresses. Forum security processing considers them "personal information" and may prevent the event log from posting if these are present.)

Copy and pasted text is preferred over images. Be aware that, if you post any images, your message will be made Private for a time, as all images must be approved by the Forum Moderators before the messages containing them become generally visible.

If you can't find the problem or you'd rather have Comcast take care of it and an employee does not respond to your message here, call them at the phone number on your bill or 1-800-Comcast, or use one of the options on https://www.xfinity.com/support/contact-us/. It's not likely they can fix the problem remotely. If not, insist they send a tech out to identify the cause and correct it.

If the tech finds bad coax, splitters, amplifiers, or connections in your home (even if Comcast originally supplied them) you'll probably have to pay for the visit (approx $100) unless you have their Service Protection Plan ( https://www.xfinity.com/support/articles/service-protection-plan, closed to customers that don't already have it). If the trouble is due to a faulty Comcast rental device or anything outside your home you shouldn't be charged.

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@billk55 

Please redact the CM MAC and the CMTS MAC addresses from some of your error log entries for your privacy. They are considered to be personal information. The posting of personally identifiable information is a violation of their forum guidelines. The forum bot will not allow your post to be seen publically. It flagged your post as "Private".

Downstream, power levels are a bit too high, and several SNR values are borderline to out of spec (too low). Upstream power levels are borderline to out of spec (too high). Suggest you have a Comcast premise tech out to investigate and correct.

Please be aware that there are 2 kinds of responses in this Forum: Replies and Comments. When you Comment on a post by scrolling down to "Comment on this post here...", I am notified of your response. But if you select Reply, I am NOT notified and may not be aware of your response.

Our Digital Care Team can help, @billk55! And, thank you @BruceW, and @EG for your contributions. @billk55 - can you please send a direct chat message with your full name and complete service address to “Xfinity Support”? To do so, click on the chat icon located at the top right of this forum's page.
 
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