Visitor

 • 

3 Messages

Saturday, June 20th, 2026 3:06 AM

Closed

Correctable modem errors.

My CM500-100NAS coaxial cable modem has many correctable errors, and no uncorrectable errors. What do I do about the coaxial cable modem's many correctable errors?

Oldest First
Selected Oldest First

Accepted Solution

Expert

 • 

118.6K Messages

1 day ago

That's a very small amount, depending on the modem uptime since the last reboot. There are zero uncorrectables. They are the ones that would be a problem. Correctables cost you nothing. They are negligible. The FEC (forward Error Correction) function is doing its job, humming along correcting corrupted bits. The downstream power is a bit on the low side, but the SNR is very good.

If you are not having any performance issues, then don't sweat it.

(edited)

Visitor

 • 

3 Messages

Thank you for your advice. Kind regards from all of us, 

Expert

 • 

118.6K Messages

@user_3bqv2x​ 

My pleasure ! Be well !

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? Please mark an Accepted Answer!tick

Expert

 • 

118.6K Messages

2 days ago

Are you actually experiencing any connectivity / speed / dropout problems, or just focusing on the errors ? Not having any uncorrectable is a good thing !

Visitor

 • 

3 Messages

If you look at the picture we posted, the CM500-100NAS modem is updated to version 1.01.15, and factory reset. We have no connectivity, speed, or dropout problems on our coaxial Internet modem. We don't want to change anything on the coaxial modem, or cables, to make things worse. We have only the correctable errors. A very long time ago, we had no correctable errors. Is it possible that correctable errors should be ignored? Is it possible for anyone to find out what causes correctable errors?

forum icon

New to the Community?

Start Here