| 摘要 |
<p>PURPOSE:To avoid overload even if the number of processing requests is increased by varying the interrupting period in response to the magnitude of load of a central controller in a central controller of a telephone exchange. CONSTITUTION:The state of call processing load of the central controller CC1 is detected by a detecting section 2, the periodic signal from a basic period signal generating section 4 is varied in response to the output signal and an output is generated from the period control section 5 to a period interrupting request section 3. When the load state of the device CC1 is less than 40%, a utilizing efficiency signal (a) of the device 1 is detected by the detecting section 2 and when the signal is given to a frequency dividing circuit 50 via a selecting circuit 51, the frequency division circuit 50 performs the control command so that the selecting circuit 51 selects a frequency dividing signal T1, a period interrupting request section 3 performs the interrupting request in the period of the signal T1 to the device CC1 and frequency dividing signals T2, T3 are selected depending on the utilizing efficiency of the device CC1.</p> |
