VoIP development of the third stage, the goal is to NGN evolution, this is a very important stage, this time the VoIP will become a universal service, China unicom data fixed, deputy general manager li think ten main characteristics at this stage, he noted, the top 10 characteristics to the evolution process of NGN network and VoIP business must solve the problem of 10, 10 characteristics as follows: IP to end communications services to provide a service quality assurance; To the public to provide more personalized voice value-added services; From a single media communication to the development of multimedia communication; Fixed and mobile communication business communications integration business; The fusion of telecom business and Internet business; Between different networks NGN net began to appear, have very good interconnectivity and interoperability, etc.,
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