If there is something wrong with the configuration, please go to WAN page and choose
General Setup again to modify the WAN connection.
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Sometimes, a wrong connection can be improved by returning to the default settings. Try to
reset the router by software or hardware.
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You can reset router to factory default via Web page.
Go to System Maintenance and choose Reboot System on the web page. The following
screen will appear. Choose Reboot with Factory Default Configuration and click Reboot.
After few seconds, the router will return all the settings to the factory settings.
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Warning: After pressing factory default setting, you will lose all settings you did
before. Make sure you have recorded all useful settings before you pressing. The
password of the factory default is null.
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Vigor3900 Series User's Guide