System and method for call processing using a wired telephone network and mobile communication terminal thereof

PURPOSE: A system and a method for processing a call using a wired telephone network and a mobile communication terminal thereof are provided to separately form a packet data channel and a circuit data channel to which a call connection request is transmitted, thereby reducing transmission error of incoming telephone number data. CONSTITUTION: A base station(120) wirelessly transceives data with a mobile communication terminal(110). An MSC(Mobile Switching Center)(130) processes a voice call of the mobile communication terminal. A packet network exchange(140) processes a data call of the mobile communication terminal. An ACR(Automatic Call Router) server(180) manages incoming telephone number data.