Patent ID: 7783314
Filing Date: 2010-08-24
Classification: H04L,H04W

Abstract:
1. A Push To Talk (PTT) system, comprising: a first terminal for generating and transmitting a signal indicating a current state of a user; a second terminal for receiving data directed to the first terminal when the first terminal is not available; and a PTT server for receiving a PTT message directed to the first terminal, and for transmitting the PTT message to the second terminal when the signal indicating the current state of the user is received from the first terminal and indicates that the first terminal is not available, wherein the signal indicating the current state of the user comprises at least one of a signal indicating absence, a signal indicating a conference state, and a signal indicating a busy state, and wherein the signal indicating the absence state and the signal indicating the conference state are generated when the first terminal receives an absence setting signal and a conference setting signal, respectively, through a predetermined setting key from the user.