Log in to the OnSIP Admin Portal.
Left side of screen select "User". On the Home screen, click "Create New User." This will take you to the "Users" tab, with a dialog to create a new user. Provide the user's name, email address and extension. With just that information, you can create a user and assign them an extension. We recommend that extensions are four digits long starting with the number 7. For example: 7001.
You can further customize your user by filling in some of the other fields including Cell Phone, Voicemail. Under the Advanced heading you can customize the user's SIP address, set their Music-on-Hold stream, and enable e911.
You will see a note informing you that you have created a new user!
Once a user has been added, you can go into the Users tab and click on the user's name to see her details. Clicking the "modify" link will allow you to change information for that section.
Please be careful if you delete a user, as his/her information cannot be recovered afterwards.