System and method for achieving efficient coordination of protec

Details System and method for achieving efficient coordination of protec System and method for achieving efficient coordination of protec

1997-05-30

2000-04-11

Ton, Dang

Multiplex communications

Fault recovery

Bypass an inoperative switch or inoperative element of a...

370224, 370395, 370535, H04J 314

Patent

active

060495235

ABSTRACT:
The delineation and quick invocation of protection switching is achieved by generating a protection indicator having an initial state at the point that a transmission facility failure is detected and passing the indicator downstream. A switch that receives the indicator either increments or decrements the indicator in accordance with predetermined rules. However, a switch that receives the indicator when it reaches an active state immediately invokes protection switching if that switch is at the sink end of an associated protection path.

REFERENCES:
patent: 3991278 (1976-11-01), Fang et al.
patent: 5146452 (1992-09-01), Pekarske
patent: 5838924 (1998-11-01), Anderson et al.

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