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Forum Discussion
I have comcast internet and my modem keeps dropping connection to internet service (C7800)
It's been over a month now and comcast blames netgear and netgear blames comcast. I've already got a replacement modem and the issue persists so I'm blaming comcast. The connection of internet service...
Hi there... I've had similiar issues, and posted similar experiences here: https://community.netgear.com/t5/Cable-Modems-Routers/CM1000-intermittent-connection-loss-on-XFinity-cable/m-p/1913727#M23855
The key here is to ask Xfinity/Comcast to put a monitor on your line, so they can analyze from remote what's happening to your line. In my case they figured out it had something to do with some equipment upstream probably at their node, which fixed it for us. Keep an eye on your modem's Power (dBmV) and SNR/MER (dB)... they should be at 0dBmV and about 40db respectively. If they fluctuate and drop below a certain amount, that could be causing the drops. Like when mine went to -5dBmV and 36dB, I would start getting errors and drops. It has now stabilized, and my internet has been stable for 4 days in a row, which I haven't seen in many months.
Zevas1993 wrote:
It's been over a month now and comcast blames netgear and netgear blames comcast. I've already got a replacement modem and the issue persists so I'm blaming comcast. The connection of internet services constantly gets lost. In order to get connection back I have to reboot the router or power off the modem for 30 seconds then turn it back on. I've heard that you can backdate to a different firmware and that has fixed the issue but I can't find any info on that. Included are some screenshots of logs on the modem. Sometimes the internet lasts hours sometimes it last fifteen minutes before having to restart everything again. Is there any fix known to this?