| 摘要 |
PURPOSE:To eliminate the need for a failure detecting section and to reduce the cost, by assigning a specific address to each processor of an electronic exchange, and performing test communication of each call connection control processor through a common bus from an input/output control processor. CONSTITUTION:An input/output processor 21 performs test communication through the common bus periodically to call connection control processors 22, 23 provided with a specific address. When a failure is detected in the call connection control processor 22 of the common use system, the address of the call connection control processor 23 is registered as the common use system. Since the failure detecting section is not required, the cost of the hardware is decreased and since the call connection control processor is controlled freely with a specific address, the failed part of the call connection control processor is inspected in detail. |
