I keep losing my internet signal, and I've tried about all of the suggested fixes.

1. What kind of modem and router do you have?

2. What are the signal levels to the modem? You can find them by putting 192.168.100.1 into a webpage. I can provide more specifics once I know what kind of modem you have.

3. When you lose the internet on one device, do you lose it on all? Or just wireless devices? Just wired? 

4. When the internet IS working, does it work well?

1. Modem is a Motorola Surfboard SB6121, router is a Belkin N600.

2. Signal to noise - 37 db, downstream power is 0 to -1, upstream power 39-40, and:

3. Typically I lose the connection on both devices.

4. When the internet does work, it's fine. 

One other thing - I had these exact same symptoms with my previous modem/router.

I would first check the logs on the modem for around the time the problem happens. If you decide to post the logs, make sure to remove and MAC addresses. 

Next I would check to make sure the electrical, specifically for the modem, is good. Make sure it isn't connected to a power strip with 10 other things or something. 

That isn't anything serious. You would want to focus on errors marked critical.

A TLV-11 is just a error because ISP use configuration files that work for all kinds of modems, so now and then the modem notices some of the commands are not designed specifically for that modem. It doesn't effect connection. Any other entries from around that time? 

Also, you want to remove you MAC address from the logs like you posted above. Its a possible security risk. 

Thanks, I removed the MAC address info, thanks for the tip. There are no other entries from around that time. 

Hmm, that suggests its not a modem issue or signal issue, unless the modem just isn't keeping logs of the problems, which is unlikly. Any logs from the router? Even though its not a router hardware issue, perhaps it could be some kind of network issue the router might log. If we can't get log data on the issue the only way to fix it is trial and error, which is sloppy and takes a while. 

Also, when you lose the connection, do you lose any lights on the modem?

No logs from the router. To your question re lights on the modem, I don't lose any lights when I lose the internet connection, it appears as it normally would when things are cool. 

I have my modem plugged into a regular two plug outlet. The modem is plugged into one of the outlets, the other has a surge protector strip plugged in and my other electrical stuff is plugged into it.

Without router logs, or more data on the problem its tough to troubleshoot. I would try power cycling just the router next time, see if that fixes it. That would atleast help isolate things. 

Also you might try bypassing the router for a day and connect direct to the modem, and then see what exactly happens to the computers connection. Is it losing a IP, seeing the connection go totally dead, seeing latency, etc. A computer will give more info on a problem then a router, especially if you can catch it while it happens.

Also it might help for a moderator to take a look at your modem with their diagnostics tools, see if maybe they can see something that we can't. 

This is what I was able to pull from my router logs re yesterday. 

Just lost connectivity again. Modem stays lit up, router turns from "blue" light to "orange." Brand new modem and router yet exact same problems as with the old. 

I've been a customer for Cox for over twenty years, but if something doesn't happen soon, I'm exploring other internet connectivity options. A new modem, new router, two technician visits and I still have poor service. Something has to give.