| 摘要 |
<p>PURPOSE: To prevent the down of LAN to improve the applicability and the operability of LAN by providing a communication management server terminal with a terminal management list of the address, the group identifier, the operation condition, etc., and turning on the power source at a client terminal by a specific telegram from the communication management server terminal and indicating mutual power-on between terminals to prevent the delay of power-off at the communication management server terminal. CONSTITUTION: A communication management server terminal 21 is provided with a terminal management list 28 of the address, the group identifier, the operation condition, etc., and client terminals 23 to 25 turn on the power sources by the specific telegram from the communication management server terminal 21. Therefore, power-on is indicated not only to the communication management server terminal 21 from client terminals 23 to 25 but also to client terminals 23 to 25 from the communication management server terminal 21. Thus, the applicability and the operability of LAN26 are improved.</p> |
