a2billing DID API

A2billing DID api A2billing has already an API for DIDx we need API integrated for vitelity in order to forward DIDs to customer accounts [login to view URL] Functionalities: 1) Customer can see available DIDs (Countries,areas,numbers) Order DID Forward to his sip account or a number(using available dialplans ratecards,like a2b does when forward a did normally) 2)Charge per month to his account, if balance is lower than selling price to customer number gets released from his account else renewed -so there is a buy rate grabbed from the did provider and sell rate that we set for the customer side 3) whatever you believe is basic function