| 摘要 |
PURPOSE:To make an effective use of the idle period of a PB transmitter by performing the control of the PB transmitter and a matrix switch by a dial digit unit. CONSTITUTION:By outputting a matrix control signal 6-1, etc, a control circuit 1 controls to close the cross point 3-1 of the matrix switch, then supplies a PB oscillator controlling signal 5 to a PB oscillator 2 so that a PB signal in the first digit is transmitted to a transmit line 4-1. Then, if another dial information is transmitted to a transmit line 4-2, controlling signal 6-1 and 6-2 respectively opens and closes cross points 3-1 and 3-2, and the first digit of PB signal of another dial is transmitted. The above processing is repeated sequentially for the second and third digits, and the digits are transmitted. By this digit-unit transmission, when another dial signal is made, each digit-unit of the said dial is consecutively transmitted, and the idle period of the PB signal is thus utilized. In result, the transmitting time to simultaneously transmit different dial signals, is shortened.
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