| 摘要 |
PURPOSE:To disconnect only a faulty node by connecting a transmission line of an active system and a spare system by means of the (k-1)-th and (k+1)-th nodes if the k-th node is faulty in a data highway system having a duplicated ring transmission line. CONSTITUTION:If a fault occurs in a node 20k in a duplicated data highway comprising the active system 4 and the spare system 5, a supervisory device 1a detects it and gives a command to a node 20k-1 to connect the active system transmission line 4 and the spare system transmission line 5 via the active system transmission line 4. Then the device 1a gives a command to a node 20k+1 to connect the active system transmission line 4 and the spare system transmission line 5 via the spare system transmission line 5. Thus, the operation of a communication system is continuted by disconnecting the faulty node 20k only. |
