We are a VoIP company in the US looking for a PHP programmer to customize the open source A2Billing (based on Asterisk)project to allow for the billing of our origination (incoming DID) minutes. System already is setup and functions for calls made out by our customers, but we basically need to replicate teh same scripts and processes for incoming calls.
Baiscally, duplicate the billing engine for inbound calls.
13 freelancers are bidding on average $430 for this job
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