| 摘要 |
PURPOSE:To widely shorten a release operating time and to attain the protecting of necessary data by transferring and saving the data in a memory to other normal exchange at the time of detecting an abnormal situation generation and after the release, storing the data into the memory. CONSTITUTION:At the time of the generation of fire, etc., a temperature detecting device 7 detects a peripheral abnormal high temperature and informs a control device 8. The control device 6 first occupies all leased lines 3 and diagnoses whether or not a transferring destination exchange is normal. When it is confirmed to be normal, a changing-over device 6 is controlled, a data memory 2 is connected to the released lines 3, and thereafter, the data in the memory 2 are transferred. At the receiving side, after the data are received by a receiving data processor 5 once, the control part 8 stores the data into the memory 2. At this time, the device 5 stores only the number of a transmitting side exchange and displays, to an indicator panel 9, that the data transfer is executed and informs of it. Thus, the data saved at the memory 2 are read through a data output interface 10 at the time of the release work of the transmitting side exchange and stored into the memory 2 at the released transmitting side.
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