| 摘要 |
PROBLEM TO BE SOLVED: To prevent erroneous speech path data stored in a backup memory from being read out and to prevent speech path data from being set into a memory when the number of times of write into the memory exceeds a maxi mum value in the case of setting a speech path at a speech path equipment. SOLUTION: Concerning the speech path equipment composed of a switch control part 1 composed of a central control circuit 11, ROM 12, RAM 13, non-volatile backup memory 14 and external control interface circuit 15, speech path part 2 composed of a speech path switch 21 and a control memory 22 and external control equipment 3, the speech path data, write processing start flag and write processing end flag are stored in the non-volatile backup memory 14 and when both the flags are coincident at the time of restart after fault generation, restarting processing is executed while using the speech path data stored in the backup memory 14. When the values of flags get equal with the limited number of times of write, writing into this memory is stopped. |
