PTT CONTROLLING METHOD FOR COMMUNICATION BETWEEN FULL DUPLEX VOIP AND HALF DUPLEX VOIP

A PTT control method for interworking between half duplex voice packet and full duplex voice packet for maximizing the convenience of a user is provided to transmit and receive a control message by a message protocol without additional PTT control server. A first terminal in a full duplex VoIP(Voice over Internet Protocol) network catches PTT(Push To Talk)(102). A second terminal receives a control message transmits the control message which the first terminal catches in the half duplex VoIP network. The first terminal transmits the voice packet to the second terminal(104). When PTT which the first terminal caught is placed, the control message of the object that the first terminal places PTT is transmitted to the second terminal.