Communication network system

Details Communication network system Communication network system

H - Electricity

04

L

H04L 12/42 (2006.01) H04L 1/22 (2006.01) H04L 12/46 (2006.01)

Patent

CA 2267472

Two between-ring connection node devices are placed between ring networks A and B, these are connected by between-ring transmission lines for which it is possible for each of the items that face each other to switch between current use lines and spare lines, and for each ring network, the two between-ring connection node devices are operated to switch between being a current use system or a spare system. While being able to avoid communication interruptions between ring networks due to faults of the between-ring connection node device itself, it is also possible to avoid communication interruption when line switching fails between-ring transmission lines, and thus to increase fault resistance.

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