IP Telephony Accounting and WAN Deployment Experience

Convergence of data and telephony networks is one of the current trends in telecommunications. It is supposed that all telephony traffic might be carried over a common data network infrastructure in the future. In accordance with this development, wide area IP telephony network has been deployed in the TEN-155 CZ network (located in Czech Republic), connected to the European network for research and education TEN-155. In this article we describe our practical experience with deployment of IP telephony services over a wide area network. We particularly pay attention to the description of IPTA, the IP telephony accounting application, which has been developed as part of our project. IPTA differs from other IP telephony accounting applications by its modular structure, ability of using multiple accounting schemes in paralel and certain other features which we describe in this article. Keywords—IP Telephony Accounting, RADIUS, Voice Gateway.