| 摘要 |
PURPOSE:To protect file contents by guaranteeing normal access to a file storage means stored with a system file even if a telephone exchange is powered OFF or has a drop in power source voltage. CONSTITUTION:A DET 2 once detecting the power source break or power source voltage drop of a POW 1 informs a DKC 3 of the abnormal state. In response to the information, the DKC 3 interrupts access to a DKE 4 at the moment when sector access ends if a DKE 4 is currently accessed. When the DKE 4 is not currently accessed, no processing is performed even if power source abnormality information is received. |
