| 摘要 |
PURPOSE:To read traffic data possessed by an MCA control station at any time by providing a data edition means for editing a traffic data request command and a traffic data reception means for receiving the traffic data transmitted from the MCA control station via a talking channel. CONSTITUTION:When the traffic request command is talking traffic data at present time, a call data edition subroutine is executed. When no reply is obtained from the MCA control station to call, the system transits to a stand-by program 3sec later. A flip-flop 21 of a traffic data reception circuit 20 is set during stand-by. When the flip-flop 21 is set, a radio wave is transmitted intermittently in response to the operation of a pulse generating circuit 24 to prevent the detection of 2sec radio wave intermission. When the time not receiving any traffic data is elapsed for 10sec, the system restores to the stand-by state. In receiving the traffic data, the connection of a talking channel is subjected to the MCA control station within 60sec. When the numeral of the traffic request command is ''11'', voice information is executed from the MCA control station. |
