Internet cuts out

The upstream power is too high and it may be intermittently fluctuating even higher to out-of-spec levels. It's already way out of spec on the OFDM channel # 41. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.

In an effort to try to obtain better connectivity / more wiggle room, check to see if there are any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage from Home Depot, Target, Wal-Mart, etc. Splitters should be swapped with known to be good / new ones to test.

Also check the coax cable for any damage such as cuts, nicks, abrasions, kinks, sharp bends, etc.

If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two-way splitter connected directly off of the drop from the street / pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.

Good luck with it !

@KashedHitz 

Please do. Good luck !

A possible problem has already been established and a course of action has been put into motion......

Ok, I disconnected all the cables and didn't see any signs of corrosion. All the connectors have rubber covers to keep water and stuff out it seems. Everything is tight and there aren't any crazy bends. I took pictures just in case but it doesn't look like there's a way to upload them anyway. So as far as I can tell everything on the house side seems to be in good condition.

@KashedHitz 

If there is nothing more that can be done to improve the connection quality, then you'll need a tech visit as stated. 

Bear in mind that if the premises facing techs can not find or fix a problem at your home, it is they who are responsible for escalating it up to their line / network / maintenance dept. techs. The problem may lie beyond your home in the local neighborhood infrastructure somewhere but it is their S.O.P. to start at the home. And if the problem is found to be on their side of the demarcation point, there will not be any charge.

Good luck !

Just wanted to give an update. After some more troubleshooting, it turns out that my Google wifi network mesh system appears to have been at fault. Those routers kept losing connection with each other where I thought the whole signal was getting lost. After switching everything on to the wifi directly from the Xfinity modem, I have not had any noticeable service interruptions.

I feel silly, such a simple thing I feel like I could have found that out much sooner.

@XfinityAdrienne 

I reopened this topic so that I can comment, OK ???......

@KashedHitz 

No worries ! Glad you got it figured out ! Hope things hold up for you ! Take care !