D-Link DWM-312W Quick Installation Manual page 16

DWM-312W Quick Installation Guide
If you configured the device previously, after access to the web-based interface
the login page opens. Enter the username (admin) in the Username field
and the password you specified in the Password field, then click the LOGIN
button.
In order not to log out, move the Stay signed in switch to the right. After
closing the web browser or rebooting the device, you need to enter the
username and the password again.
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