Method for call setup of mobile communication terminal

The present invention relates to a mobile communication terminal of the call set-up method, the essential protocols that make up the H.324M (Mandatory Protocol) only the real-time image transmitted and received in the text data related with the call to provide a telephone service using a video chat service Thereby, it is possible to improve the user's convenience using a video call service. The present invention to achieve this if the process of trying a first and a call between two terminals connected to a video call and connect the call, the process of attempting to negotiate between the first and second terminal for a video call with the If the negotiation is completed, and the first terminal by the second process of requesting a chat service between the terminal and the second terminal responds with the first and second terminals, the video / audio data associated with the video telephone chat service and it includes a step of performing a video call via a multiplexer of the text data involved.