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Cable connection drops, high uncorrectables, slow Internet speeds and webpage loads
I just upgraded to Cox's 100 Preferred tier last month, and now my Internet connection would disconnect on its own. I had a Cox contractor came out to my house in February 2017, and he fixed the issue by removing something in the junction box, but now the disconnects, slow webpage loads, slow Internet speeds, and high uncorrectables have returned with a vengeance. I'm using a SB6141 which I had in my possession since 2014. These problems are getting really annoying. I have even tried rebooting my cable modem and router, but those have done no good. I don't want to spend money on a new cable modem and still face the same problems I am experiencing now.
Here are my signal levels:
| Downstream | Bonding Channel Value | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Channel ID | 22 | 21 | 23 | 24 | 17 | 18 | 19 | 20 | |
| Frequency | 939000000 Hz | 933000000 Hz | 945000000 Hz | 951000000 Hz | 909000000 Hz | 915000000 Hz | 921000000 Hz | 927000000 Hz | |
| Signal to Noise Ratio | 36 dB | 37 dB | 37 dB | 37 dB | 37 dB | 37 dB | 38 dB | 38 dB | |
| Downstream Modulation | QAM256 | QAM256 | QAM256 | QAM256 | QAM256 | QAM256 | QAM256 | QAM256 | |
Power Level
|
9 dBmV | 10 dBmV | 10 dBmV | 9 dBmV | 10 dBmV | 9 dBmV | 10 dBmV | 10 dBmV | |
| Upstream | Bonding Channel Value | |||
|---|---|---|---|---|
| Channel ID | 3 | 1 | 2 | 4 |
| Frequency | 29800000 Hz | 18400000 Hz | 23300000 Hz | 36300000 Hz |
| Ranging Service ID | 76 | 76 | 76 | 76 |
| Symbol Rate | 5.120 Msym/sec | 2.560 Msym/sec | 5.120 Msym/sec | 5.120 Msym/sec |
| Power Level | 34 dBmV | 32 dBmV | 33 dBmV | 34 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 | 21 | 23 | 24 | 17 | 18 | 19 | 20 |
| Total Unerrored Codewords | 10454073760 | 10454108503 | 10454100783 | 10454117678 | 10448581022 | 10446032096 | 10443367605 | 10449438125 |
| Total Correctable Codewords | 1211 | 1238 | 1315 | 984 | 505996 | 650359 | 741639 | 378655 |
| Total Uncorrectable Codewords | 11789 | 11453 | 10830 | 10558 | 5011273 | 7407782 | 9992753 | 4267576 |
Here are my error logs:
| 17 2017 17:54:47 | 3-Critical | T05.0 | SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=xxxxxxxxx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0; |
| Aug 15 2017 10:54:45 | 6-Notice | I401.0 | TLV-11 - unrecognized OID;CM-MAC=xxxxxxxxxxx;CMTS-MAC=xxxxx-QOS=1.1;CM-VER=3.0; |
| Aug 15 2017 10:54:45 | 5-Warning | Z00.0 | MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=xxxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0; |
| Jan 01 1970 00:00:26 | 3-Critical | R02.0 | No Ranging Response received - T3 time-out;CM-MAC=xxxxxxxxxxxxxxxx;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=xxxxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0; |
| Aug 15 2017 10:47:50 | 6-Notice | I401.0 | TLV-11 - unrecognized OID;CM-MAC=xxxxxxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0; |
| Aug 15 2017 10:47:50 | 5-Warning | Z00.0 | MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=xxxxxxxxxxxxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxxxxxxxxxx-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=xxxxxxxxxxxxxxxx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0; |
| Aug 15 2017 09:26:30 | 6-Notice | I401.0 | TLV-11 - unrecognized OID;CM-MAC=xxxxxxxxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0; |
| Aug 15 2017 09:26:30 | 5-Warning | Z00.0 | MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=ddddddddd;CMTS-MAC=dddddbdddddddd;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=ddddddddddddddddd;CMTS-MAC=ddddddddddddddddddddCM-QOS=1.1;CM-VER=3.0; |
| Aug 14 2017 16:15:15 | 3-Critical | R02.0 | No Ranging Response received - T3 time-out;CM-MAC=ddddddddddddddddd;CMTS-MAC=ddddddddddddddddddd;CM-QOS=1.1;CM-VER=3.0; |
| Aug 14 2017 13:40:57 | 3-Critical | T05.0 | SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=ddddddddddddddddddd;CMTS-MAC=ddddddddddddddddd;CM-QOS=1.1;CM-VER=3.0; |
| Aug 14 2017 12:45:51 | 5-Warning | T202.0 | Lost MDD Timeout;CM-MAC=xxxxxxxxxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0; |
| Aug 14 2017 12:45:51 | 5-Warning | N/A | DS Partial Service Fallback: MDD Lost-> CM in DOCSIS 3.0 Recovery Mode ;CM-MAC=xxxxxxxxxxxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0; |
| Aug 14 2017 12:45:28 | 3-Critical | T05.0 | SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=xxxxxxxxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0; |
| Aug 14 2017 04:44:53 | 6-Notice | I401.0 | TLV-11 - unrecognized OID;CM-MAC=xxxxxxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0; |
| Aug 14 2017 04:44:53 | 5-Warning | Z00.0 | MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=xxxxxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxxxxxxxxxx;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=xxxxxxxxxxxxxxxxxx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0; |
| Aug 13 2017 18:05:22 | 6-Notice | I401.0 | TLV-11 - unrecognized OID;CM-MAC=xxxxxxxxxxxxxxxxx;CMTS-MAC=xxxxxxxxxxxxxxxxxx;CM-QOS=1.1;CM-VER=3.0; |
ChrisL
Former Moderator
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From this end the modem appears to be online and reporting good signal levels. Are you able to duplicate the issue without the router attached?
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NerdGirl
New Contributor
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Yes, I'm able to duplicate the issue without the router attached
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DannyS
Moderator
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Hello,
Checking this connection, we do find the signal strength is good along with not finding any packet loss. However we are finding some forward error correction issues which could be creating these intermittent drops and showing up as uncorrected errors. It appears we may need to send a tech out. To do so, please reach us on Twitter at @CoxHelp, visit us on Facebook, or email by at cox.help@cox.com. Provide us the name on the account with the full service address with a link to this thread so we can get started.
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NerdGirl
New Contributor
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Sorry for the long reply because I work 2nd shift. I will email Cox Help. I don't have Facebook or Twitter.
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NerdGirl
New Contributor
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Two Cox Contractors came and installed two in-line attenuators, tightening the connector in the box, fixed the wall outlet and a new coaxial cable. No more high uncorrectables, slow webpage loads, slow Internet speeds, T3 or T4 time outs, and other errors since.
Error logs(these was from yesterday).
Signal levels:
[3] 64QAM
[3] 64QAM
[3] 64QAM
[3] 64QAM
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MichaelJ
Moderator
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NerdGirl
New Contributor
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You're welcome. I hope it stays this way.
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