I'm a networking student, but we don't exactly cover things like the frequencies and connections that are used in cable modems, so bear with me.
I'm starting to have a lot of intermittent connection drops that will last for anywhere between 10 seconds and a minute or so, and it's only started the last couple days. We took advantage of a promo by Cox for the free modem upgrade at no cost. This was especially good for us because we had sort of put ourselves in a weird spot with our modem at that point. We are paying for the 300/30 package, but we only had an SB6141 - meaning we weren't quite able to get 100% of the speed we were paying for, but knowingly. The idea of a free upgrade to allow us to hit the last bit of paid speeds was good, so we took it.
Since then, there's seemingly nothing but worse quality. Only two things were changed. That modem SB6141 -> CM8200 (yes, CM not SB), and the coaxial cable that runs from it to the wall (shorter cable and less excess to deal with - it came with the replacement modem). Before, we didn't really have problems, but now the issues started noticeably the last couple days, just after switching the modems out. Speeds and pings are perfect unless the problem is actively happening, then absolutely no data gets in/out. No modem restart. Internal network access is good during that time. I've looked for all that I know to for trying to point fingers at the router, but it's just not the case.
I'm noticing millions - yes, literally millions - of uncorrectable errors on the modem status page in less than a 12-hour period (from about 4am to about 3pm). Support obviously can't find anything, and they've done remote node tests and all that. They've offered to send a tech, but being a student, I'd rather save the $55 in the unlucky chance that they find nothing. I'll agree with support that my connection looks otherwise completely fine as far as channel signals and that stuff, but they have no idea about the errors. I'll post a screenshot of the status and error pages. Not sure what to make of all the codeword errors. I've never seen that many before.
Typically, the errors are 0 for all channels, but I noticed that after a burst of outage before finally going to bed, I refreshed the status page and noticed that all channels jumped in errors slightly. Doesn't coincide with the errors listed on error page, though. That was about 7am-ish.
Sorry if I didn't give enough info, or gave to much. Just not sure if having the tech come out is the best choice or not. Figured I'd throw a post out here and see what others thought. The speeds are great when they're working. Actually better than what I'm paying for both down and up. It's just that when doing things that need a reliable connection (games, streaming both up and down, etc), even problems for more than 2-3 seconds really screw with that.
Edit - Apparently the pic uploads of my pages won't take, so I'll do like I saw in another post and just slap an imgur link down: https://imgur.com/a/KIi0L
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