The SVG2482ac does not have the option to enable router mode, so you are unable to connect the T25 with the SVG2482ac.

To connect with T25, I would recommend considering models like the G34, G36, G54, etc.

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I prefer my modem separate from the router. So the T25 and then a router separate. Modem/router combo devices tend to have firmware that the end user can’t update. Having them separate gives the user more options.