Patent ID: 7512410

Claim:
A PTT communication system comprising: a plurality of terminals connected to a network and having respective PTT buttons for obtaining a token for PTT communications; a management server connected to said network, for managing advertisements or contents; and a PTT communication server connected to said network, for controlling a token for PTT communications; said PTT communication server comprising: terminal state monitoring means for monitoring pressed states of the PTT buttons of the respective terminals; token control means for assigning a token to one of the terminals whose PTT button is pressed and sending communication data transmitted from the terminal whose PTT button is pressed through said network, to another one of the terminals through said network, when the PTT button of said one of the terminals is pressed, and for assigning a token to said management server when the PTT button of any one of said terminals is not pressed; and distribution control means for distributing advertisements or contents selected by said management server to said terminals through said network when said token control means assigns a token to said management server.