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We need to develop a simple SIP/Call billing engine entirely running with PHP. We have developed our own communication API which uses XML to communicate with the client/server. Our RESTXML requests to the application made via POST, (But can also be configured to use via HTTP GET or POST).
Exact details can be provided later with all other documents. To have a picture this is going to be a VoIP billing solution. If you have VoIP experience you know what I am talking about, otherwise will provide all the exact details.
Billing and Rating
Customer Web portal
Usage and profit report
Resource monitoring ...
Let me know if more details are required.
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