The Quintum have the ability to play one language IVR as minimun.
Call will come in trought T1 , receive the IVR prompt to enter the account number, and get the ammount of funds available on that account.
(You have so many dollars)Please enter destination.
Then the system will calculate the minutes based on the destination number and play “you have this many minutes”
And pass the call trought.
The only trouble is that you will need a radius billing system to keep the accounting.
What kind of IVR is that system???? Is something available on the market or someone built it in a a basement????
Best regards.