| 摘要 |
PURPOSE:To realize the simultaneous transmission of dial, by storing the dial information from a plurality of terminals to the memory having the memory area corresponded and transmitting and controlling the dial pulse to a plurality of lines sequentially, through the readout of the content. CONSTITUTION:When dial information from each terminal is input to the control circuit of central unit, it is stored in the area corresponding to the dial information storage circuit 20 via a gate circuit 18. The count value of the counter 13 is added one by one with the timing pulse, this is decoded at the decoder 14 to read out the dial information for the m-th line in the storage circuit 20, and it is set in the subtraction counter 19. If the content is 1, the subtraction counter is subtracted by one with the input from the gate 17 and it is stored in the corresponding memory area again when the one set pulse mS is present in the m-th line in the lines 1S, 1R- nS, nR. Further, the memory area for the m+1-th line is read out in the next timing. If the content of the counter 19 is 0, the reset pulse mR is made and the dial pulse is formed at the post stages. |
