| 摘要 |
An administrative server automatically manages the operating time of each device and promotes the rotation between the devices having longer operating times and the devices having shorter operating times to thereby reduce the occurrence of trouble, whereby the operating efficiency is improved. The operating times of a plurality of terminal equipments are measured, so that the operating times of the respective terminal equipments can be equalized at the expiry of a predetermined operation period tf. Rotation candidate terminal equipments are determined among the plurality of terminal equipments based on the accumulated operating times of the respective terminal equipments by then before the expiry of the predetermined operation period tx, and terminal equipments rotation messages are sent to the rotation candidate terminal equipments so determined. Stored data of the rotation candidate terminal equipments is backup processed onto an administrative unit in accordance with the message, and after one of the rotation candidate terminal equipments is exchanged with another of the rotation candidate terminal equipments and they are connected back to a system, the data associated with the one of the rotation candidate terminal equipments is downloaded on the another of the rotation candidate terminal equipments. The operation of the respective terminal equipments are resumed all together after the rotation of all the rotation candidate terminal equipments has been completed.
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