Communication apparatus and communication system

Details Communication apparatus and communication system Communication apparatus and communication system

2006-05-30

2006-05-30

Yao, Kwang Bin (Department: 2667)

Multiplex communications

Fault recovery

Bypass an inoperative channel

C370S244000

Reexamination Certificate

active

07054265

ABSTRACT:
Interlayer-coordinated communication-line switching in a network including two layers, each having a switching function. In the present invention, a communication apparatus which (1) is connected with a network including (i) lower layer apparatuses which are connected with communication lines of a lower layer and communication lines of an upper layer and conducts line switching in the lower layer and (ii) upper layer apparatuses which are connected with the communication lines of the upper layer and have means for line switching in the upper layer and (2) detects line failure and coordinates line switching using failure information on the lower and upper layer communication lines.

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patent: 6202082 (2001-03-01), Tomizawa et al.
patent: 6324162 (2001-11-01), Chaudhuri
patent: 6430150 (2002-08-01), Azuma et al.

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