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slow internet and streaming with s34

  • October 2, 2025
  • 1 reply
  • 45 views

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We have Xfinity 500 mbps using an s34 and a netgear mr60 mesh system. Rarely get more than 250 mbps

Best answer by SURFboard Moderator

To isolate the issue, we recommend checking whether the S34 modem delivers the full 500 Mbps speed as per your subscription. This can be done by directly connecting a computer to the modem using an Ethernet cable bypassing the router entirely to test the speed.

If the speed remains below expectations, the next step would be to check 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.

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1 reply

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To isolate the issue, we recommend checking whether the S34 modem delivers the full 500 Mbps speed as per your subscription. This can be done by directly connecting a computer to the modem using an Ethernet cable bypassing the router entirely to test the speed.

If the speed remains below expectations, the next step would be to check 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.