A2Billing is a telecom switch and billing system capable of providing and billing a range of telecom products and services to customers such as calling card products, residential and wholesale VoIP termination, DID resale and callback services.
This is NOT a bug, it's misconfiguration, re-check, and re-configure that behaviour under dial_balance_reservation, and min_credit_2call in your agi-config!
Regards,
if customer with 5 credit balance buy a DID with cost of monthly 5 credit
when customer call to did , you have not enough credit played and call will drop
also this scenario occur with zero balance and free did