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Building Telephony Systems with OpenSER by Flavio E. Goncalves

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Where Are We?

We are going to work on the billing side of the solution. The proxy is working fine, completing calls between users and gateways. However, we are not billing the calls. Billing is a two-step process. In the first place, you have to determine the duration of the call. This is done using RADIUS or MySQL. The next step is to determine the price of that single call. We will use CDRTool, an open-source tool to help us in this task.

Where Are We?

VoIP Provider Architecture

The VoIP server uses the concept of AAA (Authentication, Authorization, and Accounting). Until now, we have used only MySQL to authenticate and to authorize users. We can use MySQL or ...

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