Edimax Technology BR-6225N - Manual (Page 166)

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6-3 Restart
If you found that the broadband router is not functioning correctly, or
responding slowly then usual, you can use this function to restart the
broadband router, and this may correct the problem.
Click ‘Apply’ button to restart the broadband router. You’ll be prompted
to confirm the restart, click ‘OK’ to restart the broadband router.