| 摘要 |
<p>An FPS capable of changing a communication frequency and a control method thereof are provided to enable a user to more conveniently sense an emergency state of the other user and actively coping with the emergency state. An emergency signal transceiving method comprises the following steps of: enabling plural terminals belonging to first and second wireless communication groups to perform voice communication by using first and second frequency channels; enabling the terminals belonging to the first and second wireless communication groups to set the third frequency channel as an emergency frequency; enabling a terminal, where an emergency situation occurs, transmit an emergency signal, where its ID(Identification) is included in a DTMF(Dual Tone Multi Frequency) signal, to a terminal of a briefing room by using the third frequency channel when the emergency situation occurs in the first or the second wireless communication group; and determining a member who transmits the emergency signal by enabling the terminal of the briefing room to extract the ID of the DTMF signal included in the emergency signal.</p> |
