| 摘要 |
PURPOSE:To improve the reliability by providing a storage device storing temporarily maintenance operation information corresponding to plural exchanges so as to eliminate missing of information from the exchanges. CONSTITUTION:The information outputted from the exchanges 7a-7n is stored in storage devices 44a-44n via MODEMs 6a-6n, communication lines 5a-5n, MODEMs 45a-45n and communication control interfaces 43a-43n respectively. When it is desired for a centralized maintenance operation station 1 to reference the information, a command base designates the storage devices 44a-44n desired to be referenced, its instruction is analyzed by a selection switching control section 42, the designated storage devices 44a-44n are accesed, the read information is fed to a centralized maintenance operation station 1 via a communication line selecting switch device 41 and stored in an external storage device 2. |
