Abstract: A multimedia integrated communication system for analyzing a fittest communication routing is disclosed. In one embodiment, the system includes i) communication means for transmitting and receiving multimedia communication data of the users, ii) a multimedia routing platform for transmitting and receiving the multimedia communication data to/from the communication means, and controlling the communication means so that the voice and image signals are communicated through a fittest communication routing by integrating/converging different kinds of communication means, iii) a network including a wire/wireless telephone network and a wire/wireless data communication network for transmitting and receiving the multimedia communication data and iv) an agency server for grasping communication environment information of the communication means through the platform, and determining a fittest multimedia communication routing before a call is connected and then transmitting the multimedia communication data therethrough.

Abstract: A calling method using a communication integration system, which has a CIS server configuring a cell bound in connection of plural communication means and plural communication networks and a relay server connected to at least two CIS servers, includes the steps of: (a) transmitting a fittest communication route calculation request signal from the CIS server to the relay server; (b) the relay server calculating a fittest communication route between users based on a predetermined weight according to the request signal and then providing the fittest communication route to the CIS server; and (c) the CIS server connecting a call between communication terminals of the users.