| 摘要 |
PURPOSE:To attain the switching of redundancy system without requiring the redundancy system switching section, by providing a memory section storing an address of a call connection control processor to an input/output control processor, and rewriting the content of the memory. CONSTITUTION:An address of a call connection control processor 22 is stored to a memory section 6 of an input/output control processor 21, and each processor is communicated through a common bus 4. When the call correction control processor 22 is failed and it is detected at the input/output control processor 21, the processor 21 rewrites the content of the memory section 6 into the address of the call connection control processor 23. As a result, after the failure of the call connection control processor 22 is detected, the switching of the redundancy system communicated with the call connection control processor 23 is performed through the common bus 4 in the input/output control processor 21. Thus, the switching of redundancy is attained without requiring a special redundancy switching section. |
