| 摘要 |
PURPOSE:To secure a control system which is applicable effectively to the toll dial system featuring different impulse speeds, by releasing the register sender in case the next pulse does not arrive within the fixed time when the retransmitted dial impulse speed is higher than the reception dial impulse speed. CONSTITUTION:The reception given from the preceding station is received at the digit designation information receiving means comprising the reception pulse developing circuit, the reception pulse digit counting circuit, relays AR-FR and others; the transmission time is secured for the retransmitted dial impulse via relays AS-FS for the retransmitted pulse digit counting circuit; and register sender RS is released via release relay PLS. In case the retransmitted dial impulse speed is equal to or higher than the speed of the reception dial impulse, sender RS is released in case the next reception dial impulse does not arrive within the fixed time. Thus, the control system can be applied effectively to the toll dial system including exchanges featuring different dial impulse speeds. |
