This article will show you how to do the following.
Add a PBX to your account.
Verify PBX Credentials.
Test your PBX System
Click on the Apps button in the top right of the screen.
Click PBX Connector.
If a PBX is already setup on the account and a new one needs to be added, click Add PBX at the bottom right. Otherwise, skip to the next step.
Select your PBX System.
Name the PBX System.
Select if your IP is static or not.
If Yes
Enter in the Static IPv4, IPv6 and Static Port
If No
Enter in your username and password.
Click Next
Set the Invite Format
Turn Compatibility ON or OFF
Click Submit