PDA TERMINAL AND METHOD FOR SUPPLYING MULTILATERAL CALL SERVICE REGARDLESS OF LOCATIONS BY USING PDA TERMINAL, CONCERNED WITH GUARANTEEING THE MOBILITY OF VOIP SERVICE

PURPOSE: A method for supplying a multilateral call service by using a PDA(Personal Digital Assistant) terminal is provided to supply a multilateral conference service regardless of locations at a low cost by using PDA terminals, and to supply a VoIP(Voice over Internet Protocol) service as well, thereby guaranteeing the mobility of the VoIP service. CONSTITUTION: A VoIP application program confirms whether a PDA terminal of a promoter is located within an AP area(S110). If so, the VoIP application program controls a wireless LAN module of the PDA terminal so that the PDA terminal can be connected on the Internet, and displays a selection screen asking the promoter whether to perform a person-to-person call or to perform a multilateral call. If the multilateral call is selected, the application program receives ID information on each conference participating target terminal(S130), and enables the multilateral call by informing each terminal of the multilateral call. The application program converts inputted voice data into digital packet data(S150), and includes the ID information on each terminal in the digital packet data(S160), then supplies the information to a VoIP network(S170).