Visitor

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Monday, April 20th, 2026 2:33 AM

T3 Timeouts (and corresponding internet drop-outs), RNG-RSP CCAP Commanded Power in Excess of 6 dB, and other issues.

Hello,

I've been fighting an issue with intermittent drops outs and packet loss for some time (two+ years now). It sometimes works fine for months, then it's just...not great, daily (sometimes every few hours), for a while (at a time.) I'm out of ideas for this problem and would really like to get someone that can actually look at y'all side of things, to look at them.

I've replaced everything that could possibly be related AND a technician has been out (~two weeks ago.) This did not help.

I've swapped:

* modem (twice, once was an xfinity, the other was a hitron)

* all cabling including what's in the wall

* the ground wire attached to the moca filter. Confirmed it was good to the ground rod (0.1 ohm or less)

* attenuators, several values, with plenty of time on each to allow for rebalacing

Technician swapped out my attenuator for a -7.5db splitter (and wrecked my SNR in the process), reterminated the feed between my dmarc and the tap, and replaced the MOCA filter.

I've got a forward path attenuator on the way, it's the last thing I can think of to try, but I don't think it's going to help at this point. I've swapped the -7.5db splitter back out for my regular attenuator (6db) to at least get back to good SNRs. I left the technician's work alone for ~two weeks to confirm whether the issue was resolved (or not.)

I also have a phantom modem on my account that no one seems to be able to remove. I've asked multiple times, each time I've been promised it was removed. It has not been removed. Is there some way that could be causing provisioning issues? I'm grasping at straws here...

I have a lots of logged signal data -- timestamped 10 second resolution from the modem, that shows the bursts of uncorrectables that correlate with the modem dropping out. This information is probably only useful to an plant tech that can access the CMTS and nodes. I'll need to export it from my monitoring database in a usable format (presumably csv.)

Now that I've exhausted literally every option I can think of (except using a FPA), and have had a technician out, I'd really like a direct message link to dump additional (non-public) information to someone that can actually get it to the right people to do further investigation.

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Official Employee

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1K Messages

1 day ago

Howdy user_m95nvg! I appreciate you stopping by our community for help with your internet issues, and you've come to the right place 👏 Speaking from my own experiences, timeouts and connection drops are some of the most frustrating things to deal with for sure! The amount of detail on what's been going on and what's been done up to this point helps immensely, and I appreciate you going through the lengths you have to get everything consistent again. If you could send our team a direct message with your full name, the name listed on the account (if different), and the full service address associated with your account, I'd be happy to dig into this further with you 👍

 

To send a Direct Message, please click on the “Direct Message” icon in the top-right corner of the screen, next to the bell icon, click the "New message" (pencil and paper) icon, then type or select "Xfinity Support". Type your message in the text area near the bottom of the window and press Enter to send your message and initiate a live session.

 

Expert

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117.5K Messages

17 hours ago

@user_m95nvg @XfinitySeth 

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.

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