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Thursday, April 3rd, 2025 12:51 PM

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Dropping connection- Critical 3 T3 time-out

Hello. I have a Netgear CM2000. I keep receiving critical 3 T3 time outs in my error log. I had a tech come out, he found a kink in the line at the pole and replaced. Checked signals at the line coming into the home and at my modem- all good. However I'm still getting T3 time-outs. One of my downstream channels is getting some uncorrectables

Here's my log and Diagnostic

Time Priority Description
Thu Apr 03 01:42:34 2025 (Critical (3)) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Wed Apr 02 17:32:29 2025 (Notice (6)) CM-STATUS message sent. Event Type Code: 24; Chan ID: 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Wed Apr 02 17:31:10 2025 (Notice (6)) CM-STATUS message sent. Event Type Code: 23; Chan ID: 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Wed Apr 02 17:30:18 2025 (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=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Wed Apr 02 17:25:49 2025 (Notice (6)) CM-STATUS message sent. Event Type Code: 24; Chan ID: 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Wed Apr 02 17:24:30 2025 (Notice (6)) CM-STATUS message sent. Event Type Code: 23; Chan ID: 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Wed Apr 02 17:23:38 2025 (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=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Wed Apr 02 17:19:09 2025 (Notice (6)) CM-STATUS message sent. Event Type Code: 24; Chan ID: 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Wed Apr 02 17:17:50 2025 (Notice (6)) CM-STATUS message sent. Event Type Code: 23; Chan ID: 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Wed Apr 02 17:16:58 2025 (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=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Wed Apr 02 17:13:47 2025 (Notice (6)) CM-STATUS message sent. Event Type Code: 4; Chan ID: 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Wed Apr 02 17:12:32 2025 (Notice (6)) CM-STATUS message sent. Event Type Code: 16; Chan ID: 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2.;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Wed Apr 02 17:12:29 2025 (Notice (6)) CM-STATUS message sent. Event Type Code: 24; Chan ID: 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 3.;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Wed Apr 02 17:12:27 2025 (Notice (6)) CM-STATUS message sent. Event Type Code: 16; Chan ID: 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2.;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Wed Apr 02 17:11:56 2025 (Notice (6)) CM-STATUS message sent. Event Type Code: 1; Chan ID: 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Wed Apr 02 17:11:23 2025 (Warning (5)) MDD message timeout;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Wed Apr 02 15:10:52 2025 (Critical (3)) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Mon Mar 31 17:26:13 2025 (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=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Mon Mar 31 17:24:10 2025 (Notice (6)) CM-STATUS message sent. Event Type Code: 24; Chan ID: 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Mon Mar 31 17:22:51 2025 (Notice (6)) CM-STATUS message sent. Event Type Code: 23; Chan ID: 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Mon Mar 31 17:19:33 2025 (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=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Mon Mar 31 17:17:30 2025 (Notice (6)) CM-STATUS message sent. Event Type Code: 24; Chan ID: 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Mon Mar 31 17:16:11 2025 (Notice (6)) CM-STATUS message sent. Event Type Code: 23; Chan ID: 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Mon Mar 31 17:12:53 2025 (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=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Mon Mar 31 17:10:50 2025 (Notice (6)) CM-STATUS message sent. Event Type Code: 24; Chan ID: 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Mon Mar 31 17:10:06 2025 (Notice (6)) CM-STATUS message sent. Event Type Code: 4; Chan ID: 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Mon Mar 31 17:09:31 2025 (Notice (6)) CM-STATUS message sent. Event Type Code: 23; Chan ID: 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Mon Mar 31 17:09:06 2025 (Notice (6)) CM-STATUS message sent. Event Type Code: 4; Chan ID: 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Mon Mar 31 17:08:35 2025 (Notice (6)) CM-STATUS message sent. Event Type Code: 1; Chan ID: 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Mon Mar 31 17:07:58 2025 (Warning (5)) MDD message timeout;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Mon Mar 31 16:16:53 2025 (Critical (3)) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=54:07:7d:02:c7:60;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Sun Mar 30 12:44:47 2025 (Critical (3)) UCD invalid or channel unusable;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Sun Mar 30 12:36:43 2025 (Critical (3)) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Sun Mar 30 12:34:43 2025 (Critical (3)) UCD invalid or channel unusable;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Sun Mar 30 12:34:11 2025 (Critical (3)) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;
Thu Mar 27 17:42:33 2025 (Notice (6)) CM-STATUS message sent. Event Type Code: 24; Chan ID: 194; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=NA;CMTS-MAC=NA;CM-QOS=1.1;CM-VER=3.1;

Downstream OFDM Channels
Channel Lock Status Profile ID Channel ID Frequency Power SNR / MER Active Subcarrier
Number Range		 Unerrored
Codewords		 Correctable
Codewords		 Uncorrectable
Codewords
1 Locked 0 ,1 ,2 ,3 193 690000000 Hz 6.18 dBmV 43.4 dB 388 ~ 3707 6987211606 2813999004 0
2 Locked 0 ,1 ,2 ,3 194 957000000 Hz 5.78 dBmV 42.5 dB 148 ~ 3947 7084841388 3315409526 307

Question

 • 

Updated 

4 days ago

 • Edited

37

5

XfinityBenjaminM

Official Employee

 • 

1.9K Messages

11 days ago

 

user_w2i8u3 Hello! Thank you for reaching out to us here on our Community Forum. We'll be happy to investigate this further and see what is causing the issues with your connection. 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

 

0

0

EG

Expert

 • 

109.8K Messages

11 days ago

@user_w2i8u3 @XfinityBenjaminM 

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.

1

user_w2i8u3

2 Messages

@EG​ problem seems to have been solved- with two possible solutions. 

though the coax cable ran through my house tested fine and power/ signal to noise were all in spec- I moved the modem to a wall jack closer to the home entry point, which also used a newer cable. The power levels on both downstream odfm channels are above 7

I was also told there was recently maintenance in my area. While I don’t think this cause the t3 timeouts- as they had been happening for a long time- it’s possible this maintenance fixed an issue causing my connection issues.

so as others have said- try swapping all coax cables first to rule out cable issues within the home, and then if the issue continues contact support to check outside lines/connections 

8 days ago

EG

Expert

 • 

109.8K Messages

8 days ago

@user_w2i8u3 

Thanks for updating your topic. Hope things hold up for you ! Good luck !

0

XfinityVianney

Official Employee

 • 

2.1K Messages

8 days ago

@user_w2i8u3, I wanted to circle back here again to thank you for all your time. I'm glad we got your services and account situated. Have a great day! 

0

0

XfinityChelseaB

Official Employee

 • 

1.6K Messages

4 days ago

Hello @user_w2i8u3, I'm so happy we were able to get you taken care of tonight. If you need anything in the future please feel free to make another post and a Digital Specialist, Forums Expert, or community member will help you as soon as possible. I hope you have a great rest of your night and stay safe.

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