Intermittent Connection Drops

Is this with a WiFi connection ? If so, as a test, does a computer / device that is hardwired directly to the router / gateway device with an ethernet cable have the same problem ?

With this test, we are trying to isolate this down to being either a WiFi-only problem or a problem with the general connection to the Comcast system which would of course affect both. It's a good first step in troubleshooting before proceeding any further. 

Thanks for the response. The issue happens on both WiFi devices and devices connected directly to the modem via ethernet. I'm using a rented modem from Comcast, and the light on the top of the modem flashes orange during the outages.

OK what do the modem's signal stats look like ? Try getting them here; http://10.0.0.1 

Please copy all of the text in its entirety of the *Downstream Power Levels*, the *SNR's* (Signal to Noise Ratios), and the *Upstream Power Level* numbers and paste them into your next post.

What is the exact make and model number of the modem / gateway device ?

Here's the info about the modem:

Cable Modem

The stats were OK at that snapshot in time. Are there any modem component RF error log entries being shown ? Be advised that you may not be able to get these anymore as it is a feature that appears to have been disabled by them in their rented gateway devices. If they are available, please post them as well in their entirety (copy and paste them, don't post a screenshot) but redact the CM MAC and the CMTS MAC addresses for your privacy. They are considered to be personal information. The posting of personally identifying information is a violation of their forum guidelines. The forum bot will not allow your post to be seen publically.

I don't see these logs anywhere, and I don't see anything about RF errors in the logs I can see (System, Event, and Firewall).

Ok, I'm not surprised..... I think that the suits made a very bad decision to eliminate a valuable troubleshooting tool such as that. They likely did it to cut down on what they consider to be unnecessary / excessive trouble calls into the system. The *dumbing down* of everything saves them big $$$...... 

Anywho, with that said, perhaps there is noise ingress into the line(s) /  an upstream channel / return path impairment somewhere.

There are other signal stat values that can't be read by the modem. They are the "Upstream Rx Power" (Upstream Receive Power Level), the "Upstream SNR Ch." (Upstream Signal To Noise Ratio), and the "Upstream ICFR" (In Channel Frequency Response). These are as equally important in diagnosing connectivity issues as are the modem's stats.

I'm going to escalate your issue to the Comcast corporate employees (The Digital Care Team) who are available to these boards. They will be able to poll the CMTS (Cable Modem Termination System) to check for any real-time degradation and / or error reports, see your node / cable plant, and modem health, and see whether or not everything is in the green zone. They can also see a history plot for the modem and those upstream receive signal stats.

You should get a reply here in your topic. Good luck !

I am also seeing these intermittent connection drops during the last month. Owned Xfinity modem stats look fine. Drops are as described by the OP. Southwest Chicago suburbs.

Took me 2X to post this as a drop happened while hitting the button.