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NGN service architecture has the three main functional characteristics of Agnosticism, Support for legacy capabilities and features, and Support for an open service interface. This paper shows the convergence model for NGN based on Web Services and provides a detailed scenario of each convergence model in form of Web Services. NGN users can create and provide enhanced services, which enables application of NGN capabilities using the "Applications" functional group known as the Application-to-Network Interface (ANI).
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