Cable Modem CM700 T3 and T4 Errors in logs.

Question

So I've been having continuing internet problems over the past month, where overtime when I'm playing a video game or watching something online, it will literally become unplayable or watchable because the internet basically cuts out. What is kind of odd is the problem goes away if I don't go on the internet for awhile, then it's like I have a set amount of time I can get on the internet till it goes out again. I bought a brand new modem (CM700) and brand new router to try and fix the problem, along with several Cox technicians come and literally rewire everything to try and fix the problem. Obviously none of those solutions have fixed it and now I'm here trying to reach out to more support. I hate to think that my modem is the problem, considering I've spent 100+ dollars on a brand new one, and everytime I've talked to Cox support, they've blamed it on my modem's "return status". I checked on my modem's log to see it's littered with critical errors and warnings repeated over and over again.&nbsp;
TLV-11 - unrecognized OID (11)
SYNC Timing Synchronization failure - Loss of Sync (15+)
No Ranging Response received - T3 time-out (12+) - seems to follow the SYNC timing error
MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1 (3+)
Lost MDD Timeout (1)
Hell of a lot of errors that I don't really understand. I tried reading up on them, but I don't really see the reason they're being caused. I need to know this to know if my modem is the problem, ISP, or cables or whatever is causing it.&nbsp;
I have pinged to google 15 times during one of the internet's "episodes" and came back with 50% packet loss. Don't have to be smart to know somethings definitely wrong.
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Also to note, this set of errors are logged from June 2-4
LET ME KNOW IF YOU NEED ANYMORE INFORMATION OR TESTS, I WILL GLADLY TRY TO GIVE YOU THEM.

vkdelta · Answer

Please post connection table and event logs screenshots.&nbsp;

Selest · Answer

1 -&nbsp;https://gyazo.com/5ab148af8229798af6236df22befa01e
2 -&nbsp;https://gyazo.com/e3deda6df33513eaa504c7ea8d08d5b7
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Not sure which one is the connection table. If none of these are please let me know where it is.
1 -&nbsp;https://gyazo.com/3eefdeaae2a3d04cd6c342035d19ca19
2 -&nbsp;https://gyazo.com/0a34ff72326fdf150da65532e5f4eccb
3 -&nbsp;https://gyazo.com/e286be410b35a111264ba98d8c7804f3

vkdelta · Answer

your signals on your line is completely out of whack.
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in Downstream you have thosands on uncorrectables. No wonder you are losing packets
in upstream you have 2 channels which are maxing out upstream power at 51dBmV. you will see some internet disconnections if the power goes beyond this.
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there is no question that your line quality is bad. I would be surprised if the cox tech says line is good and modem is bad.&nbsp;
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to get a 3rd party opinion, you can post your signal stats on DSLreports.com forum and post.
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https://www.dslreports.com/forum/coxhsi
https://www.dslreports.com/forum/comcast
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generally comcast forum has better response rates.&nbsp;
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Selest · Answer

So you definitely don’t think it’s the modem? I was get furious with the support, since I just bought a brand new one. And to be clear the Cox SUPPORT said it was a problem with my modem each time. The technician literally ran a new wire from the pole to our house hoping it would fix it. Do you think it has to do with the outside lines in the area?Also what do you think I should tell the technician? I’m having the THIRD technician come to our house tomorrow to figure things out.

vkdelta · Answer

as long as you have good Coax cables and you have connected/tightened it properly, it should not be modem issue.&nbsp;
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as I mentioned, you can try posting your logs on other forums where many other folks will comment and provide their opinion.
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If it really a modem problem, you can ask them to put their 32x8 modem (not 8x4 or 16x4) and prove it to you that there are 0 uncorrectables and US power is not hitting 51dBmV. Dont just put the cox modem for 5 mins to prove. Run heavy traffic on the modem (including multiple speedtests, netflix, and large file downloads to prove it). Sometimes they just connect for 5 mins and tell you "see, no error, it is your modem problem". the uncorrectables increase when there is lot of traffic.
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you want to show US power is very high to technician
You want to show very high number of uncorrectables to technician.
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Forum Discussion

Cable Modem CM700 T3 and T4 Errors in logs.

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