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Question

Second Ethernet Port on T25

  • December 3, 2025
  • 1 reply
  • 4 views

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My router’s ethernet port is only 10/100. Can I use the second ethernet port on the T25 to connect directly to my PC for faster speed? I would only use the router modem connection for Wi-Fi.

1 reply

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The T25 is a standalone cable modem and does not include a built-in DHCP server. As a result, when your internet service provider (ISP) activates the modem, it typically assigns only one public IP address, which supports a single internet connection.

If you wish to use both Ethernet ports on the T25 simultaneously, you would need to contact your ISP and request the activation of a second public IP address. However, please note that not all ISPs offer multiple public IP addresses for residential customers.

For more details on the functionality of the T25’s Ethernet ports, please refer to the link below:

https://arris.my.salesforce-sites.com/consumers/articles/knowledge/T25-Ethernet-Ports

Could you please confirm the internet speed plan you are subscribed to?

If you are experiencing slow connection speeds, try isolating the issue by connecting a computer directly to the modem using an Ethernet cable and temporarily removing the router from the setup.