The last module routes call to the PBX as a last resort.
Create a PBX Transformation Table
Create the PBX Transformation Table Entry.
Notice that UserValue2 is employed to restore the original calling number to the Calling Number IE.
Create a PBX Route Table.
Create a PBX Route Table entry that points to the PBX.
Create an Action that sends calls to the PBX Route Table.
Add an entry to the main Action Set.
Configuration complete, your main Action Set should look like the following figure.