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user_8y368j
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Thursday, March 12th, 2026 4:14 PM

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one channel - high errors - new modem

switched mg7550  for  mg8702 - worked with reddit  mod_mail until got banned by reddit somehow.

see  https://imgur.com/i9tyku5

As of march 10 reboot  I had zero errors

https://imgur.com/4R06sAZ

Question

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Updated 

19 days ago

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XfinityOrlandoM

Official Employee

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3.3K Messages

1 month ago

@user_8y368j

Thanks for reaching out to us,  we do apologize for any inconvenience you're having with your connection. Can you tell me what kind of trouble steps you have taken? 

 

https://www.xfinity.com/support/articles/internet-connectivity-troubleshooting

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user_8y368j

12 Messages

 I used to have mg7550. Zero errors for months. Then comcast did some maintenance in the neighborhood overnight a few weeks ago. Had many UnCorr errors. Comcast thought it might be old modem. So I now have mg8720 (docsis 3.1)  Thru reddit  modmail they checked line and after a day or 2 and a few reboots, it seemed fixed. (now banned on reddit ?) Then one channel ( I believe #7 started having errors. This morning I power cycled modem and again it seems OK. No errors after 8 hours. I will check again in a few hours.

1 month ago

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XfinityAbby

Official Employee

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797 Messages

@user_8y368j thank you for letting us know! I am glad to hear it seems to be working now, keep us updated on how your services are working in a few hours! 

I am an Official Xfinity Employee.
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1 month ago

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user_8y368j

12 Messages

1 month ago

Still decent speed (3/16 8am) and only a few UnCorr errors - notice the downstream blue arrow on modem never stops blinking - prev modem always 'locked' on and glowed steady.

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XfinityPeterH

Official Employee

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2.7K Messages

 

user_8y368j That can sometimes mean that there is an issue such as coax connection. Have you checked your cables to make sure they are at least finger tight? 

 

I am an Official Xfinity Employee.
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1 month ago

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user_8y368j

12 Messages

Having just swapped modems, yes - the 2 connections involved are nice & tight. Issues only happened after comcast 'repairs' in the neighborhood. I had 3 months of zero errors before the 'work' was done. Nothing on my line/pole. Just somewhere else in the neighborhood.

1 month ago

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XfinityPeterH

Official Employee

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2.7K Messages

 

user_8y368j Gotcha, but the speed/connection is solid and service is running smoothly other than the light not showing a solid status and a few errors?

 

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
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1 month ago

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user_8y368j

12 Messages

Speed good - no delays. 

log :

   08:57:29
Mon Mar 16 2026   Notice (6)   CM-STATUS message sent. Event Type Code: 22; Chan ID: 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=(mac hidden);CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
    09:04:07
Mon Mar 16 2026   Notice (6)   CM-STATUS message sent. Event Type Code: 20; Chan ID: 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=(mac hidden);CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
    09:09:27
Mon Mar 16 2026   Notice (6)   CM-STATUS message sent. Event Type Code: 22; Chan ID: 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=(mac hidden);;CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;

bottom 2 rows of status :
   Ch Lock Status     Mod           Ch ID  Freq. (MHz) Pwr (dBmV) SNR (dB) Corrected Uncorrected
   33 Locked            OFDM PLC    193  722.0            9.9               42.2      2065360088    23
   34 Locked            OFDM PLC    194  957.0            4.3               40.7      2051456808    64                                                      over 2 billion errors ?

I'd like to believe some day it will stop blinking and not have so many  OFDM PLC   errors.

(edited)

1 month ago

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XfinityPeterH

Official Employee

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2.7K Messages

 

user_8y368j If you want we can look at your account and send some new signals over but honestly if everything as far as your connection is solid, I tend to just leave things alone (If it aint broke don't fix it), but at the end of the day it's your call. 

 

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please, mark a reply as the Accepted Answer.tick

1 month ago

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