Belkin AC750 DB User Manual page 21

GETTING STARTED
Enter the username and password supplied by your
Internet provider and click "Save." Ignore the other fields
unless required by your ISP. The Router will restart.
If after a few minutes your Internet Status says
"Connected," you're done! You can surf the Internet.
If these steps do not work, try restarting your
modem and repeating the process.
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