Intermittent Connection - Internet Dropping - Arris SB8200

The power levels are marginal to out-of-spec, and they may be intermittently fluctuating even farther out of spec. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.

You may want to get the techs involved again until they fix things properly. If you want to try things yourself, here are some things that you can try;

In an effort to try to obtain better connectivity / more wiggle room, check to see if there are there 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 5-1000 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 get the techs re-involved.

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 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 !

Thanks for trying every possible option, @user_0dae35. I'd like to take a further look at your account to see if there's anything I can do to help resolve this once and for all. In order to get started, can you please send me a private message to Xfinity Support with your full name and full address by clicking the chat icon in the top right?

@user_0dae35 

The line stat numbers are still marginal. If there is nothing more that can be done to improve the connection quality, then you'll need a tech visit as stated. Good luck with it !

@user_0dae35 The numbers are in the Internet Troubleshooting Tips pinned topic at the top of this board;

Note: Not all modems will allow you to view the status page and some will have different URLs to access this info. If you are unable to access your modem’s status page, you can contact Comcast Customer Support and ask the support representative for these values.

Man this is sad. I had a tech come out Saturday and he was here for no more than 5 minutes. "Your numbers in your house are good" Left in less than 10 minutes. 

Internet and TV kept dropping. Upload speeds were less than 1mbps yesterday. I had to switch the modem cable to the first splitter coming out of the main cable. Downstream power levels were all within 1 of 0. No corrected, no uncorrectables. Internet was great last night from around 5:30PM till this morning.

All of a sudden I wake up for work and the internet goes out. My wife and I had to go to Starbucks to work because we both work from home and the internet kept dropping every 10 minutes or so.

Had another tech come out today. I followed him from the outside box to the box in front of the house to the line coming in the house to the router. And every test he did he just kept saying "See look how the speed is", "You are getting good speeds". Told him speed isn't the issue, its stability. This is ridiculous.

This tech happened to show me his phone and the map that shows them the calls around the area. We happened to be inside what he called a "call cluster". A big red cone around my house and the neighborhood. He still tried to sell me on the fact that it's not their fault, and its either the modem or one of our devices in the house causing it. 

I connected my PC direct to the SB8200 and to a TP Link modem, and issue still persists. This issue just started happening less than 10 days ago. We made no changes within or outside the house. They had maintenance trucks on our block all of last week. Every single day for about 4 hours there was a maintenance tech working outside. With a bucket truck, not a regular house tech. 

I asked our next door neighbor who also has Xfinity, and he said about a week ago he started to notice his TV would freeze when hes watching it and that his internet would go out. What is this SCAM of a company?