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The IP Multimedia Subsystem (IMS) is the proposed Next Generation Network (NGN) architecture that will be used to provide revolutionary services based on an IP backbone. For successful IMS deployment, service providers need to ensure that the services offered to customers are protected. This will ensure that customer satisfaction is upheld and that customers are retained within the network. Customer retention is an essential part of ensuring the needed investment into IMS technologies. This paper analyses a VoIP service offered over an IMS network as a revenue maximization problem. Using this technique the paper shows that it is possible to prevent unsolicited sessions and to maintain customer satisfaction.
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