Data communication network

Details Data communication network Data communication network

H - Electricity

04

L

340/71

H04L 1/00 (2006.01) H04L 12/437 (2006.01)

Patent

CA 1238961

- 36 - DATA COMMUNICATION NETWORK Abstract: A data communication network comprising ring transmission paths (0,1) interconnecting ring interface nodes *RI1, RI2, RI3) coupled with a node processor and data systems and arranged to propagate data messages along the ring transmission paths between the data systems. Each node is arranged to detect failure of the node to propagate a data message to another node and to flush the data communication network by force reading data messages off the ring transmission paths into the blocked node processor. A node is arranged to automatically maintain and restore operation of the data communication network by loop connecting ones of the ring transmission paths together to isolate segments of the network experiencing trouble and to transfer maintenance and diagnostic date messages between ones of the looped ring transmission paths to restore ring transmision paths and nodes located in isolated segments of the network to service.

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