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wilsons6's avatar
wilsons6
New Contributor
4 years ago

No Ranging Response received - T3 time-out

I've been having continuing problems with T3 time-outs for the past 6 months.  The problem will go away for a month and then rear it's ugly head and cause terrible upload speeds and disconnects.  The T3 time-out errors will be very infrequent (as little as 2 per week in some cases) when this problem isn't happening.  This tells me there is nothing wrong with my equipment (which Cox ALWAYS seems to point to) because I have not changed anything and as I am writing this message my modem is getting flooded with T3 time-outs.  

I've had a tech come out in January, Feb, March and now another one has to come out tomorrow.  These techs have vastly different levels of knowledge it seems.  Cox should know about these errors and stop blaming the customer and try to come up with a resolution.

Here are the errors:  These should look very familiar to people that have been plagued with this issue.  

2021-04-16, 21:32:26 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=9c:c9:eb:91:cd:c0;CMTS-MAC=d4:ad:71:0c:e7:23;CM-QOS=1.1;CM-VER=3.1;
2021-04-16, 21:31:25 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=9c:c9:eb:91:cd:c0;CMTS-MAC=d4:ad:71:0c:e7:23;CM-QOS=1.1;CM-VER=3.1;
2021-04-16, 21:31:17 Critical (3) SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=9c:c9:eb:91:cd:c0;CMTS-MAC=d4:ad:71:0c:e7:23;CM-QOS=1.1;CM-VER=3.1;
2021-04-16, 21:18:33 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=9c:c9:eb:91:cd:c0;CMTS-MAC=d4:ad:71:0c:e7:23;CM-QOS=1.1;CM-VER=3.1;
2021-04-16, 21:18:22 Warning (5) Dynamic Range Window violation
2021-04-16, 21:18:22 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=9c:c9:eb:91:cd:c0;CMTS-MAC=d4:ad:71:0c:e7:23;CM-QOS=1.1;CM-VER=3.1;
2021-04-16, 21:18:22 Warning (5) Dynamic Range Window violation
2021-04-16, 21:18:22 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=9c:c9:eb:91:cd:c0;CMTS-MAC=d4:ad:71:0c:e7:23;CM-QOS=1.1;CM-VER=3.1;
2021-04-16, 21:18:22 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=9c:c9:eb:91:cd:c0;CMTS-MAC=d4:ad:71:0c:e7:23;CM-QOS=1.1;CM-VER=3.1;
2021-04-16, 21:18:21 Warning (5) Dynamic Range Window violation
2021-04-16, 21:18:21 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=9c:c9:eb:91:cd:c0;CMTS-MAC=d4:ad:71:0c:e7:23;CM-QOS=1.1;CM-VER=3.1;
2021-04-16, 21:18:21 Warning (5) Dynamic Range Window violation
2021-04-16, 21:18:21 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=9c:c9:eb:91:cd:c0;CMTS-MAC=d4:ad:71:0c:e7:23;CM-QOS=1.1;CM-VER=3.1;
2021-04-16, 21:18:21 Warning (5) Dynamic Range Window violation
2021-04-16, 21:18:21 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=9c:c9:eb:91:cd:c0;CMTS-MAC=d4:ad:71:0c:e7:23;CM-QOS=1.1;CM-VER=3.1;
2021-04-16, 21:18:21 Warning (5) Dynamic Range Window violation
2021-04-16, 21:18:21 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=9c:c9:eb:91:cd:c0;CMTS-MAC=d4:ad:71:0c:e7:23;CM-QOS=1.1;CM-VER=3.1;
2021-04-16, 21:18:21 Warning (5) Dynamic Range Window violation
2021-04-16, 21:18:21 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=9c:c9:eb:91:cd:c0;CMTS-MAC=d4:ad:71:0c:e7:23;CM-QOS=1.1;CM-VER=3.1;
2021-04-16, 21:18:21 Warning (5) Dynamic Range Window violation
2021-04-16, 21:18:21 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=9c:c9:eb:91:cd:c0;CMTS-MAC=d4:ad:71:0c:e7:23;CM-QOS=1.1;CM-VER=3.1;

    

  • ChrisL's avatar
    ChrisL
    Former Moderator
    4 years ago
    I definitely apologize for any inconvenience caused by all of this. It sounds like you've been dealing with more than your share of connection issues based on what you've shared so far. The T3 errors you're seeing would indicate a 200ms loss of upstream connectivity. A few occasional such errors won't usually be noticed but if they occur frequently enough that would suggest an equipment or signal issue taking place. I do also see the modem appears to not be bonding to one of the upstream channels available. There's certainly a few things that can be tried to address that. I'd suggest starting by checking all of the connections to ensure they're hand tight still and if that doesn't help you can try connecting the modem at other outlets in the home. In the event that none of that helps we can review your account with you further to see that options are available. Feel free to email us at cox.help@cox.com should these service issues continue.

    -Chris