Enter your credentials.
Select the "Connectivity" tab, then click on "Outbound Routes" from the drop-down menu.
Click on the "+ Add Outbound Route" button.
Switch over to the "Dial Patterns" tab.
Add the rules below (optional):
North American dialing rule w/ prepend:
North American dialing rule:
911 rule:
922 rule (Test dial of 911):
988 rule:
International dialing rule:
Click on "Submit" when you are finished.
After that, select "Apply Config" to reload FreePBX and finalize your changes.