1. Run the X-Lite application and wait for the softphone to display on your screen.
2. Click Softphone → Account Settings.
3. The SIP Account dialog box opens.
4. Select Call (see SIP Account dialog — fill in highlighted parts).
5. In the User ID and Password fields, type your SIP username and SIP password (see article Creating extensions).
6. In the Domain field, type IP address or DNS name for the computer where the PBX is running.
7. Select Register with domain and receive calls.
8. Otherwise incoming calls rings only on your hardware phone.
9. Now, you can call for X-Lite to any phone number.