| 摘要 |
PROBLEM TO BE SOLVED: To provide a connection detour system, capable of speedily and highly reliably switching a route to a detour path, when a fault occurs. SOLUTION: A basic path connecting first to third node devices 111 to 113, a first detour path connecting a fourth node device 114 and a fifth node device 115 and a second detour path connecting a sixth node device 116 to a seventh node device 117 are prepared between a first terminal 101 and a second terminal 102. A network managing device 131 is provided with a connection managing part 132, a node-managing part 133 and a line-managing part 134 and connected with the respective node devices 111-117 by a control line 161. When a fault occurs in a line 141 of the present path, for example, the first node device 111 newly connects only lines 153 and 154 and forms the detour path, together with a connected line 143. Thus, since the path is switched by only connecting a line on the port side of the node device for switching the path, switching is speedy and highly reliable.
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