We are in need for a small billing system (pre-paid) to control automated voice campaigns using asterisk .call files.
The main idea is work with ".call files" using audio recorded files uploaded by customers and dialing-out for a large number of phones.
(P.s.: based on initial-end date/time)
The system needs to collect data from cdr's on mysql and apply charges to customer's based on rating plans and call duration time.
(since this is a pre-paid system, we need to have an AGI to check balance before allowing the call to proceed.)
System should have admin/customer interface with nice user interface ; also integration with paypal.
PHP , Ajax and Advanced Asterisk skills are essencial for this project.