Communication network system and loopback control method

Details Communication network system and loopback control method Communication network system and loopback control method

H - Electricity

04

L

H04L 12/46 (2006.01) H04L 12/42 (2006.01) H04L 12/437 (2006.01)

Patent

CA 2274292

A communication network system comprises ring systems (A, B, C, D) and a common node device 20 that is connected in common to ring circuits (5A, 5B, 5C, 5D) of each of the ring systems (A, B, C, D) and that gathers data from each of the ring circuits (5A, 5B, 5C, 5D) relaying it to a relay circuit 30. The common node device 20 accommodates virtual channel paths within all the ring circuits (5A, 5B, 5C, 5D) by means of a virtual path switching path. The relay transmission is realized by means of virtual path switching control that uses this common node device 20 and virtual channel switching control that uses each of the ring nodes within the ring circuits (5A, 5B, 5C, 5D).

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