1. Login to the system administration.

2. Navigate to Settings: UAD.

3. Click on the "Add User Agent" button.

4. From the "Protocol" dropdown menu select:  "sip", "iax", "mgcp" or "zaptel".

5. Enter the user agent name into the "Device name" field.

6. Finish configuring the new user agent by selecting the appropriate options.

7. Click on the "Save" button.