| 摘要 |
PURPOSE:To reduce the load of the central processor, by securing an independent state for the reception of signal concerning the channel control of the electronic switchboard from the central processor. CONSTITUTION:The channel processor SPC is connected to the signal scanner SCN of the channel, the relay driving device RC and the central processor CPU starts autonomously the scanner SCN in the cycle independent from the CPU, and furthermore reads the MF signal with confirmation of the normalcy of the MF signal to give a start to the CPU along with reception of the full digit number. Thus the information is transferred for the received data, the circuit number and the reception state of the received digit number each. And in case an order is given from the CPU and under process for the circuit state monitor or the relay control, the process under execution is discontinued to perform the corresponding process. After completion of the corresponding process, the previous process is started again at the point of discontinuation. In such way, the load can be reduced for the CPU. |
