SWITCH CONTROL METHOD FOR EXCHANGE

PURPOSE:To allow a call control task to apply call control without notifying waiting of processing time of the hardware control of a main switch by proceeding the call control without awaiting the end of the hardware control of the main switch in the call control task. CONSTITUTION:When the switch control is required in the call control service, a call control task 210 uses a switch processing request command control function 211 to send a switch processing request command to a switch control task 220 thereby realizing the call control service without awaiting the end of the hardware control of a main switch 10. The switch control task 220 receiving the switch processing request command from the call control task 210 executes the switch control corresponding to the received switch processing request command by the main switch control function 221 controlling the main switch 10. Thus, the call control is realized without notifying the waiting by the processing time of the hardware control of the main switch.