| 摘要 |
<p>PURPOSE:To ensure the communication of a network at interrupted operation by providing a bypass line ensuring 2-way communication between a host node and a subsequent node even in the event of interrupted system operation due to power interruption or the like and a selector selecting the bypass line to a normal line to each node being a branched part. CONSTITUTION:A monitor equipment 11-3 consists of 4 bypass lines 100-1-100-4 arranged between transmission lines through which a signal received from a monitor equipment 11-1 being a host node via transmission lines 40-1,40-2 in duplicate is sent to monitor equipments 11-4, 11-5 being subsequent nodes without intermission even when the operation of the monitor equipment 11-3 is interrupted due to power failure or the like and of 3 selectors 200-1-200-3 selecting the bypass line from the normal line for the signal to be sent in the occurrence of operation interrupt. Thus, even when the operation of a node is interrupted due to power interruption, the 2-way communication between the host node and the subsequent node is ensured.</p> |
