Network operator brokering system and telephone system for providing optimal routing path for voice call using the same and providing method thereof

摘要

A system and method for selecting a path for a voice call over an access network from a plurality of access networks. The system includes a call negotiation agent configured to store price information associated with the voice call in which the price information is provided through at least one of the plurality of access networks. According to the present invention, a call negotiation server is configured to store the price information associated with a voice call and store the estimation information indicative of the quality of the access networks after the voice call through the plurality of access networks is completed. The system also performs a call negotiation with at least one network operator in real time using the price information and the estimation information and selects an access network for providing a path among the plurality of access networks.