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Demand for new services and application is the main driver for entire network and terminal evolution. New forms of communication emerge from combining different media in applications used by end-systems and users. A new concept of horizontally layered architecture is being standardized through 3 GPP and other bodies. Separated application, control and connectivity layers allow independent evolution as market and technology develops. Session initiation protocol (SIP) is the standard control protocol for establishing multiparty, multimedia communication in IP-based networks. The architecture of next generation multimedia network based on 3 GPP standardization of IP multimedia subsystem (IMS) is described. At the end of the article new end-user services are illustrated.