Add Rasa AI to closed source IPPBX platform

Hi, I m a newcomer of the rasa ai. I really really loved the rasa and i want to integrate rasa ai to closed source ippbx (no modules or extensions excepted) platform with call center.

I want to use rasa as a platform. When user calls the number ippbx, will forward to rasa ai and then when user hang up the callü rasa ai the result saved on the database.

I want for rasa.

Is that possible ?