I am having a very similar issue. A few months ago something happened in my area. After a lot of tech support, I decided to upgrade my model from an SB6182 to an SB8200, hoping the additional available channels would help. I also hoped to get gigablast. At first, it stayed up for several weeks. The past few months, it's been sporadic at best. During troubleshooting, we rolled back to my SB6182 and that worked for a few weeks. Support said my SB8200 was bad, but they keep issuing outage notification for my area. Additionally, a month ago, I had a rep come out and check my house. The ONLY line in it is less than 2 years old. The rep said the signal at my tap was bad, and measured the same (bad) signal at my house. I found out later than an upstream amp had been messed up.
I'm taking screenshots of the signal meter every so often. it's really getting frustrating; I've burned several hours on the phone with support that can't seem to help. They ether don't know what is going on or don't have the tools to help :(
I'm back on the SB6182 for the moment. Going to review the snapshots I took of signal and compare to the notes posted below.
Hi EdmUse, we recognize that your time is valuable, and we would be grateful for the opportunity to work with you on a resolution. What issues are you experiencing specifically? Are you on a hard-wired connection or wireless connection? Are all devices experiencing this? -Kevin M. Cox Support Forum Moderator
Everything is hardwired. (I do have a wireless). I have a fairly strait forward setup; SB8200 (SB6182 right now...), PFSense nat firewall, and a few desktops hardwired.
When the SB8200 starts having problems, I noticed that my PFSense starts alerting that it's having packet loss to the external gateway. I lose IPv4 TCP first, but strangely enough, UDP seems to last a few minutes. (I assume that's what my voip client uses).
It's difficult to troubleshoot because it stays online for a few days before it goes offline. Regardless, I do see issues with gateway checks regularly, usually during off hours.
Last night, I used the link provided above for signal levels and found that a few aren't in spec. I noticed other providers (comcast, etc) have pushed firmware updates for the SB8200 and am wondering if cox needs to do something to add whatever is needed for that.
Hello EdmUse. I recommend temporarily bypassing the wireless router and see if you continue to experience the issue. This will eliminate the router from the equation and give us a better idea of what is causing this issue. Thanks. -Allan Cox Support Forums Moderator.