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user_q3ogvy
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Friday, October 10th, 2025

Connection dropouts, High Uncorrected OFDM PLC Errors, Frequent MDD message timeouts

I keep losing internet connection. Speeds vary from 10-120 mps (400 mps plan). High uncorrected errors. Frequent MDD message timeout events.

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2 days ago

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EG

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8 days ago

The downstream power is way out of spec as are most of the SNR's ! First. Is there a drop amplifier on the coax cable line leading to the modem ? If so, would you check to see if it is powered on.

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user_q3ogvy

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When I switched from Verizon, Xfinity ran a new line to the house. As far as I know, there is nothing between the pole and the cable modem. The one modem is the only thing hooked up to the line, no cable TV boxes.

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4 days ago

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XfinityBenjaminM

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user_q3ogvy Hello! Thank you for reaching out to us here on our Community Forum. We'll be happy to take a closer look at your connection and see what is going on. When you can, please send a Direct Message with your full name and address. Here are instructions on how to send a DM in case you need them:

 Click "Sign In" if necessary
  • Click the "Direct Message" icon (upper right corner of this page)
  • Click the "New message" (pencil and paper) icon
  • Type "Xfinity Support" in the to line and select "Xfinity Support" from the drop-down list
  • Type your message in the text area near the bottom of the window
  • Press Enter to send your message

 

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2 days ago

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EG

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114K Messages

3 days ago

If there is nothing that can be done to improve the connection quality, then you'll need to get a tech out to investigate. 


Bear in mind that if the premises facing techs can not find or fix a problem at your home, it is they who are responsible for escalating it up to their line / network / maintenance dept. techs. The problem may lie beyond your home in the local neighborhood infrastructure somewhere but it is their S.O.P. to start at the home. And if the problem is found to be on their side of the demarcation point, there will not be any charge.


Good luck !

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