Administration > Management - D-Link DG-102S Quick Install Manual

Click on "Configure Call Agent IP Address". Enter in the Notify
Entity and RGW Name provided to you by your ISP.
Administration Management
For security purposes, it is recommended that you create an
administrator account for the DG-102S. This account will be used to
login to the DG-102S web-interface for configuration.
To add or change a User Account, fill in the appropriate information in the "User
Name," "Old Password" (if applicable), "New Password," and "Confirm New
Password" fields.