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Gigabit Internet Slows After a While and Now Regularly Drops Internet Connection

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Gigabit Internet Slows After a While and Now Regularly Drops Internet Connection

I just upgraded to Gigabit on January 17th with a new Motorola 8600 modem and I have had problems ever since.  After I reboot the modem, the speed usually settles into 940 Mbps/41 Mbps but after a day or so drops down to about 150-200Mbps/41 Mbps.  The connection log shows a lot of correctable and uncorrectable errors on one particular channel (17 -- 483 Mhz) consistently through multiple reboots.  The signal and power levels also drop as I head into the lower frequencies with errors only on the lower frequencies.

 

I thought maybe the inside cable had an issue so I ran brand new RG6Q with compression connecters directly from the ground block outside (also replaced the ground block) to the modem.  No change.  I bypassed my router (ASUS RT-AC88U with latest Merlin FW) by connecting directly to the modem, not much difference.  I bypassed the entire inside of the house by connecting the modem directly to the outside drop with little difference.  The same channel shows lots of errors and low signal/power levels.

 

Today the log shows lots of errors (all correctable except for channel 17) across the board and today I started having the internet connection drop out for about 30 seconds a few times a hour.  No action on my part and it comes back.

 

I had an SB6183 with the same router on a 275Mbps tier and had very few problems for several years before I upgraded the service and the modem.

Modem Error Log.jpgModem Channel Log.jpg

 

Any help would be appreciated.

 

Modem Connections 

Modem Error Log 

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Expert

Re: Gigabit Internet Slows After a While and Now Regularly Drops Internet Connection

Yeah. You have a line / signal / connection quality problem ! It may be best to get a tech out for this one !!



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Re: Gigabit Internet Slows After a While and Now Regularly Drops Internet Connection

Thank you for the analysis.  Would the same advice hold true if, like most days, the only errors are on the one channel (17)?  I don't know what is happening today with errors all over the place.

 

Is there a shortcut via this forum to schedule a tech visit or do I need to call and explain everything to someone on the phone?

 

Chris

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Expert

Re: Gigabit Internet Slows After a While and Now Regularly Drops Internet Connection

Yes. Same advice. No shortcuts. It's likely faster to call 1800comcast and book a tech visit. Good luck !


I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!
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Re: Gigabit Internet Slows After a While and Now Regularly Drops Internet Connection

This is almost exactly what Is currently happening to me. Upgraded router and speed then started having connection issues. Did you ever get your issue resolved, if so, what was the problem? I even have the same modem.