| 摘要 |
PURPOSE:To constitute a T-period pulse generator circuit economically by making counter circuits for T-period n-division pulses common and providing n-division pulse number storage circuits in m-number individual circuits respectively. CONSTITUTION:A telephone exchange is so constituted that originating subscriber ASUB may be connected to terminating subscriver BSUB through switch frame SW and outgoing trunk OGT. When n-division pulses are supplied to common circuit 10 in this constitution, numbers 1, 2...n are given to n-division pulses by the cyclic counter circuit of circuit 10. Circuit 10 scans outgoing trunks OGT1 to OGTm and gives the n-division pulse number, which is determined by the current state of the counter circuit, to OGT just after called subscriber's answer and stores the number above in storage circuit 11 of OGT. In case that circuit scans OGT for which the n-division pulse number is stored, the number is collated, and circuit 10 gives a T-period pulse to this OGT in case of agreement. That is, this OGT generates a pulse of period T just after called subscriber's answer. |
