ASTPP integration with Fusionbpx

What is the integration between Fusionpbx and ASTPP?

Does the integration allow to display and manage billing from the Fusionpbx interface?

Or on the contrary, is the interconnection limited to creating trunks between the two so that calls go out through the ASTPP to be processed?

Attentive to your comments

There is no integration. You just connect a trunk to ASTPP