The present invention comprises: a satellite terminal short-range communication module that performs short-range radio communication with a portable terminal; a satellite RF module which processes signals in order to communicate with a satellite via a satellite antenna; a voice data input and output unit which inputs and outputs voice data; and a satellite terminal control unit which forms a traffic channel through satellite communication via the satellite RF module when a voice call is requested from the portable terminal via the satellite terminal short-range communication module, transmits the voice data inputted through the voice data input and output unit to the satellite RF module, and outputs the voice data inputted by the satellite RF module via the voice data input and output unit.