| 摘要 |
PURPOSE:To discriminate the server discriminates an incoming by an indication tone, by generating incoming indicating tones for the server of the B board by the same voicing material and by transmitting two different kinds of incoming indicating tone so that the incoming for B boards and the incoming for a specific B board are distinguished from each other. CONSTITUTION:In a control circuit 6 of B boards, when an incoming indication for all B boards is given, the logic of a driving signal ALBZ for buzzers of all B boards becomes 1 to apply a signal of 500Hz of an oscillator 2 to a speaker SPK from a gate 3. When the incoming indication for a specific B board (such as a self-operation desk) is given, a driving signal BZ for the buzzer of the specific operation desk becomes logical 1 to transmit a signal, where a signal of 2Hz of an oscillator and the signal of 500Hz of the oscillator 2 are superposed, to the speaker SPK from a gate 4, and thus, the operator of B board discriminates very easily the incoming indicating tone is whether for all B boards or for a specific B board. |
