Log in to VitalPBX
Click on the "PBX" tab, click on the "Call Routing" option, then click on "Trunks" from the drop-down menu.
Set the technology to PJSIP.
When you have made all of the necessary changes, click on the "Save" button.
After that, reload to finalize your changes.
To verify your SIP Trunk's registration, use either method below.
Method 1 - PBX > Tools > Asterisk CLI
Run the command:
pjsip show registrations
Method 2 - Reports > PBX Reports > PJSIP Endpoints
Navigate to the Trunks tab: