Forum Discussion

NerdGirl's avatar
NerdGirl
New Contributor

T3 timeouts, high total correctable corewords, slow web surfing

Long time lurker, first time poster. I have Cox's preferred tier at 50Mbps down and 5Mbps up. I get T3 timeouts, channel 22 shows a high correctable coreword, slow web surfing, and I can be watching vidoes sometimes and they would end up buffering.

Here are the things I did try:

  • Physically resetting the cable modem and router (SB6141 and WNDR3700v3)
  • Reformatting the hard drive and reinstalling Windows 10 Home and all updates
  • Upgrading NIC drivers
  • Scan for viruses, malware, Trojans, and everything else using Windows Defender and Malwarebytes, but those applications have not found anything.
  • Changed Ethernet cables to the PC > modem > router to brand new CAT6 ones.
  • Did computer maintenance
  • Reboot the computer itself
  • I did use Cox Chat Support, but they were little to no assistance
  • I used "Reset Cable Modem" on the Cox Account page, but I find that to be no assistance.
Here are the signal levels(I don't have cable TV,I have DirecTV):
Downstream Bonding Channel Value
Channel ID 22  17  18  19  20  21  23  24 
Frequency 939000000 Hz  909000000 Hz  915000000 Hz  921000000 Hz  927000000 Hz  933000000 Hz  945000000 Hz  951000000 Hz 
Signal to Noise Ratio 39 dB  38 dB  38 dB  38 dB  39 dB  40 dB  39 dB  39 dB 
Downstream Modulation QAM256  QAM256  QAM256  QAM256  QAM256  QAM256  QAM256  QAM256 
Power Level
The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading
7 dBmV   4 dBmV   5 dBmV   6 dBmV   6 dBmV   7 dBmV   8 dBmV   8 dBmV  

Upstream Bonding Channel Value
Channel ID 3  1  2  4 
Frequency 29800000 Hz  18400000 Hz  23300000 Hz  36300000 Hz 
Ranging Service ID 10  10  10  10 
Symbol Rate 5.120 Msym/sec  2.560 Msym/sec  5.120 Msym/sec  5.120 Msym/sec 
Power Level 39 dBmV  38 dBmV  39 dBmV  41 dBmV 
Upstream Modulation [3] 16QAM
[3] 64QAM
 		 [3] 16QAM
[3] 64QAM
 		 [3] 16QAM
[3] 64QAM
 		 [3] 16QAM
[3] 64QAM
 
Ranging Status Success  Success  Success  Success 

Signal Stats (Codewords)Bonding Channel Value
Channel ID 22  17  18  19  20  21  23  24 
Total Unerrored Codewords 37313197248  20133346698  20133355015  20133363377  20133333533  37313204352  37313205251  37313235456 
Total Correctable Codewords 11855  448  354  167  302  694  1021  1258 
Total Uncorrectable Codewords 1597  2459  2428  2433  2378  1462  2654  2343 
 
Here are the logs:
Jan 30 2017 17:30:17 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=xxxxxxxxxxxCMTS-MAC=xxxxxxxCM-QOS=1.1;CM-VER=3.0;
Jan 28 2017 22:33:58 6-Notice I401.0 TLV-11 - unrecognized OID;CM-MAC=xxxxxxxxx;CMTS-MAC=xxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
Jan 28 2017 22:33:58 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=xxxxxxxx;CMTS-MAC=xxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:15 6-Notice N/A Cable Modem Reboot due to power reset ;CM-MAC=xxxxxxxx;CMTS-MAC=xxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
Jan 28 2017 11:01:05 6-Notice I401.0 TLV-11 - unrecognized OID;CM-MAC=xxxxxxxxxxxx:xxxxx;CMTS-MAC=xxxxxxx;CM-QOS=1.1;CM-VER=3.0;
Jan 28 2017 11:01:05 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=xxxxxx;CMTS-MAC=xxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:15 6-Notice N/A Cable Modem Reboot due to power reset ;CM-MAC=xxxxxxxxxxxxxxxxx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Jan 28 2017 10:51:31 6-Notice I401.0 TLV-11 - unrecognized OID;CM-MAC=xxxxxxxxxxx;CMTS-MAC=xxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
Jan 28 2017 10:51:31 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=xxxxxxxx;CMTS-MAC=xxxxxxxxxxxx-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:15 6-Notice N/A Cable Modem Reboot due to power reset ;CM-MAC=xxxxxxxxxxx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Jan 28 2017 10:45:26 6-Notice I401.0 TLV-11 - unrecognized OID;CM-MAC=xxxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
Jan 28 2017 10:45:26 5-Warning Z00.0

MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=xxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:15 6-Notice N/A Cable Modem Reboot due to power reset ;CM-MAC=xxxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
Jan 26 2017 21:24:32 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=xxxxxxxxxx;CMTS-MAC=xxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
Jan 21 2017 17:23:15 6-Notice I401.0 TLV-11 - unrecognized OID;CM-MAC=xxxxxxxxxxx;CMTS-MAC=xxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
Jan 21 2017 17:23:15 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=xxxxxxx:xxxx;CMTS-MAC=xxxxxxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:22 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=xxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:15 6-Notice N/A Cable Modem Reboot due to power reset ;CM-MAC=xxxxxxxxxxxxx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Jan 21 2017 16:53:50 6-Notice I401.0 TLV-11 - unrecognized OID;CM-MAC=xxxxxxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
Jan 21 2017 16:53:50 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=xxxxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;

Here are my Internet speeds from Internet Tools:


Start		 Cox
Net		Download
Speed		Upload
Speed		 
Latency		Your IP
Address		 
Cox Market
Tue Feb 7 11:07 AM Yes 60 Mbps 6 Mbps 15 millisec xxxxxxxxxx Kansas

I need assistance because paying $78 per month for Internet that disconnects and is laggy is horrible.

connection issues disconnect internet drop

4 Replies

Sort By
Most LikedOldestNewest
Replies have been turned off for this discussion
  • ChrisL's avatar
    ChrisL
    Former Moderator
    @NerdGirl

    I looked from here and the modem is showing some indications of a possible power/signal related issue. Can you try connecting the modem to a different power source and see if that helps? It may also be helpful to try testing without the router and see if that makes any difference as well.

  • NerdGirl's avatar
    NerdGirl
    New Contributor

    Two Cox contractors came today, they went outside, and removed this attenuator from the box. They also reboot the cable modem. The attenuator was going bad and that was causing my signal issues and T3 timeouts. One of the contractor said he also has a Surfboard at home and they are good modems. They don't go bad, but sometimes they do. He also said Cox changed their signal levels.

    Here are my new signal levels:

    Downstream Bonding Channel Value
    Channel ID 22  17  18  19  20  21  23  24 
    Frequency 939000000 Hz  909000000 Hz  915000000 Hz  921000000 Hz  927000000 Hz  933000000 Hz  945000000 Hz  951000000 Hz 
    Signal to Noise Ratio 38 dB  38 dB  38 dB  38 dB  39 dB  39 dB  38 dB  39 dB 
    Downstream Modulation QAM256  QAM256  QAM256  QAM256  QAM256  QAM256  QAM256  QAM256 
    Power Level
    The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading
    		13 dBmV   14 dBmV   13 dBmV   13 dBmV   13 dBmV   14 dBmV   15 dBmV   15 dBmV  

    Upstream Bonding Channel Value
    Channel ID 3  1  2  4 
    Frequency 29800000 Hz  18400000 Hz  23300000 Hz  36300000 Hz 
    Ranging Service ID 10  10  10  10 
    Symbol Rate 5.120 Msym/sec  2.560 Msym/sec  5.120 Msym/sec  5.120 Msym/sec 
    Power Level 36 dBmV  36 dBmV  36 dBmV  36 dBmV 
    Upstream Modulation [3] 16QAM
    [3] 64QAM
         		 [3] 16QAM
    [3] 64QAM
         		 [3] 16QAM
    [3] 64QAM
         		 [3] 16QAM
    [3] 64QAM
     
    Ranging Status Success  Success  Success  Success 

    Signal Stats (Codewords)Bonding Channel Value
    Channel ID 22  17  18  19  20  21  23  24 
    Total Unerrored Codewords 18808301  18816872  18799769  18826555  18794794  18795880  18798462  18828845 
    Total Correctable Codewords 14  0  12  1  16  18  13  13 

    Total Uncorrectable Codewords

    		 1503  1489  1632  1349  1494  1532  1643  1605 

    Logs:

    Feb 09 2017 14:34:38 6-Notice I401.0 TLV-11 - unrecognized OID;CM-MAC=xxxxxx;CMTS-MAC=xxxxx;CM-QOS=1.1;CM-VER=3.0;
    Feb 09 2017 14:34:38 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=xxxxxx;CMTS-MAC=xxxxxxx;CM-QOS=1.1;CM-VER=3.0;
    Jan 01 1970 00:00:15 6-Notice N/A Cable Modem Reboot due to power reset ;CM-MAC=78:96:84:f9:ab:ae;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
    Feb 09 2017 14:29:28 3-Critical T05.0 SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=xxxxxxxxxxCMTS-MAC=xxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
    Feb 09 2017 14:29:18 6-Notice N/A MDD Recovery following MDD Loss;CM-MAC=xxxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
    Feb 09 2017 14:29:17 3-Critical T05.0 SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=xxxxxxxxxxxxCMTS-MAC=xxxxxxxxxxxxxxxxCM-QOS=1.1;CM-VER=3.0;
    Feb 09 2017 14:29:05 5-Warning T202.0 Lost MDD Timeout;CM-MAC=78:96:84:f9:ab:ae;CMTS-MAC=xxxxxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
    Feb 09 2017 14:28:41 3-Critical T05.0 SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=xxxxxxxxxxxxxxCMTS-MAC=xxxxxxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
    Feb 09 2017 14:25:41 6-Notice I401.0 TLV-11 - unrecognized OID;CM-MAC=xxxxxxxxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxxxxxxxxxxxxxCM-QOS=1.1;CM-VER=3.0;
    Feb 09 2017 14:25:41 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=xxxxxxxxxxxxxxxxxxx:xx;CMTS-MAC=xxxxxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
    Jan 01 1970 00:00:15 6-Notice N/A Cable Modem Reboot due to power reset ;CM-MAC=xxxxxxxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
    Feb 08 2017 21:13:29 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=xxxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
    Jan 28 2017 22:33:58 6-Notice I401.0 TLV-11 - unrecognized OID;CM-MAC=xxxxxxxxxxxxxx:ab:ae;CMTS-MAC=xxxxxxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
    Jan 28 2017 22:33:58 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=xxxxxxxxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
    Jan 01 1970 00:00:15 6-Notice N/A Cable Modem Reboot due to power reset ;CM-MAC=xxxxxxxxxxxxxxxxxCMTS-MAC=xxxxxxxxxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
    Jan 28 2017 11:01:05 6-Notice I401.0 TLV-11 - unrecognized OID;CM-MAC=xxxxxxxxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxxxxxxxxxxCM-QOS=1.1;CM-VER=3.0;
    Jan 28 2017 11:01:05 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=xxxxxxxxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
    Jan 01 1970 00:00:15 6-Notice N/A Cable Modem Reboot due to power reset ;CM-MAC=xxxxxxxxxxxxxxxxxxxxxxxCMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
    Jan 28 2017 10:51:31 6-Notice I401.0 TLV-11 - unrecognized OID;CM-MAC=xxxxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
    Jan 28 2017 10:51:31 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=xxxxxxxxxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0;
  • ChrisL's avatar
    ChrisL
    Former Moderator
    @NerdGirl

    The downstreams look a little elevated but otherwise the connection appears fine. Ar e you still experiencing any problems?

  • NerdGirl's avatar
    NerdGirl
    New Contributor

    @ChrisL

    I  am not experiencing any problems and it have been running very stable since yesterday afternoon.