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Forum Discussion
CAX80 poor cable connection status
After getting my cable modem activated with Xfinity, I am getting a very poor signal. I use my own router downstream, in front of the CAX80, and this router gets no signal from the cable modem. ...
Power is TOO HIGH:
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
Any Criticals, Errors or Warnings seen in the event logs needs to be reviewed and resolved by the ISP. Indicates a signal issue on the ISP line up to the modem.
Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
Be sure there are no coax cable line splitters in the between the modem and ISP service box.
Be sure your using good quality RG6 coax cable up to the modem.
Start with removing any amplifiers, signal attenuators, or splitters from the coax.
From there check the line for kinks, damage, moisture in the line.
Check the connectors for improperly made ends, foil touching the copper coax line, loose connections, bad/old/cheap connectors, or corroded connections. Replace them if you do.
I spoke to a Xfinity agent on a chat & it was a terrible experience.
I provided them with the cable data statistics, but they apparently ignored it.
They declared it a cable modem issue - said the the signal looked fine from their end and so it was not their problem.
The tech who started the service a year ago was much better - he checked the signal at the service box and my modem. Since i activated my new cax80, the signal looks terrible.
Both modems were CAX80 - how can the signal reception be so different?
Unless you get some help from Xfinity, sounds like you are on your own. The ideal power level runs between 0 and +1 dBmV. They make a Coax cable attenuator. Normally they come in 3, 6, and 10 db sizes. Here is a link to Amazon: https://a.co/d/1dDlyDd.
You really need to push on a different Xfinity button than chat. There are usually some more technically oriented responders over on the Reddit sub-forum for Comcast_Xfinity.
Here is a link: https://www.reddit.com/r/Comcast_Xfinity/wiki/knowledgebase/next-generation-internet/
Is there any chance you have an amplifier in your coax line?
Good luck!
Your CAX80 is a combination modem/router. It can be configured for modem only mode for use with a separate router downstream. When the CAX80 is in modem only mode, there is a good chance the only output port that is active is port 1.
On the new CAX80, I have not disabled the router. I have been testing it for good signal with my laptop.
Thank you. I will contact them.
