C6900 connection issues

[Bturchi1]

Hello, because of this coronavirus I have been working from home, occasionally I will lose connection to the internet. The problem as far as I can figure is my up stream. The attached photo is a screenshot from my modems internet page during a disconnect. See in the upstream toward the bottom the unknown channels? Why does it do that and how do I fix it if that makes sense?

Thanks

[plemans]

both your downstream has to many errors and your upstream isn't locking and is to high on power. 

try removing any splitters, attenuators, or amplifiers from your line. preferablly hook the modem to right where the coax enters the home without anything in your line. 

Then use it for a bit and re-run the cable connections page.

If it isn't any better, then your isp needs to check your line. 

[FURRYe38]

Have the ISP check the signal and line quality UP to the modem. 
Be sure there are no coax cable line splitters in the between the modem and ISP service box. 
Be sure your using good quality RG6 coax cable up to the modem. 
Be sure to power OFF the modem for 1 minute them back ON.

[Bturchi1]

Thank you

[FURRYe38]

Let us know how it turns out. 

[Bturchi1]

I have a technician coming so I will. Thanks for the help.

[Bturchi1]

The Comcast technician said he is reading 17 at the meter and 0 at my modem so he agrees with your assessment that the cables in the apartment are the problem. Going to try an amplifier to see if that takes some of the stress out of my modem but I’m not optimistic about it if the cables are bad.

[FURRYe38]

Please tell him to check the cables, If he puts in a amplifier, then thats only going to amplify bad signals, will do nothing to help clean up signals. 

[Bturchi1]

He couldn’t come in my apartment because of Covid 19.

[plemans]

Thats unfortunate. Like @FURRYe38 said, amplifying a bad signal doesn't help any. If its the wiring going to the apartment, an amplifier could just make it worse.

[Bturchi1]

Thanks for your help. This has been really frustrating but at least I know what the problem is thanks to you guys. I really appreciate it.

[FURRYe38]

Good Luck.