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This paper discusses the feasibility of the utilization of an IMS framework as core for integration of heterogeneous networks to allow a convergent infrastructure to offer IPTV and Digital TV interactive multimedia services. During this work were analyzed access technologies available in Brazil and approved by ANATEL, your technical and economic feasibility. Were studied the IMS fundamentals, your components to session and QoS management. This research was based on papers and thesis about, published in devoted magazines by the academy and industry as well as institutes like IEEE and ACM.