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S33

  • September 7, 2025
  • 1 reply
  • 42 views

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My S33 seems to have random brain fog.  Sometimes it’s slow to connect and sometimes seems to get hung up though the light stays blue.  I have near gigbit speed when tested..  

Best answer by SURFboard Moderator

It seems like the internet connection is intermittently dropping, and the modem may be rebooting automatically when this happens.

To help isolate the issue, please connect a computer directly to the modem using an Ethernet cable. Monitor the connection to see if it still drops. This will help us determine whether the issue originates from the modem itself or from the router.

We recommend checking the cable signal levels within the modem. If the signal levels are out of the acceptable range, they can lead to the kind of connectivity issues you're experiencing.

When the signal levels are within the recommended range, your modem can maintain a stable, high-quality connection to the internet

Please refer to the link below for instructions on how to check your cable signal levels:

https://arris.my.salesforce-sites.com/consumers/articles/knowledge/S33-Cable-Signal-Levels

If you find that the signal levels are not within the recommended range, we suggest contacting your Internet Service Provider (ISP) to have them reviewed and adjusted as needed.

This topic has been closed for replies.

1 reply

Forum|alt.badge.img+42

It seems like the internet connection is intermittently dropping, and the modem may be rebooting automatically when this happens.

To help isolate the issue, please connect a computer directly to the modem using an Ethernet cable. Monitor the connection to see if it still drops. This will help us determine whether the issue originates from the modem itself or from the router.

We recommend checking the cable signal levels within the modem. If the signal levels are out of the acceptable range, they can lead to the kind of connectivity issues you're experiencing.

When the signal levels are within the recommended range, your modem can maintain a stable, high-quality connection to the internet

Please refer to the link below for instructions on how to check your cable signal levels:

https://arris.my.salesforce-sites.com/consumers/articles/knowledge/S33-Cable-Signal-Levels

If you find that the signal levels are not within the recommended range, we suggest contacting your Internet Service Provider (ISP) to have them reviewed and adjusted as needed.