Fault detection and isolation in a synchronous optical...

Details Fault detection and isolation in a synchronous optical... Fault detection and isolation in a synchronous optical...

H - Electricity

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H04L 7/04 (2006.01) H04B 10/08 (2006.01) H04J 3/14 (2006.01) H04L 12/12 (2006.01) H04L 12/24 (2006.01) H04Q 3/00 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2277493

An in-band fault detection and isolation system and method for networks such as Synchronous Optical Network/Synchronous Digital Hierarchy (SONET/SDH) networks. Fault detection may be quickly and efficiently performed by a network without requiring modification to any add/drop multiplexers (ADMs) and/or without the involvement of an external network management system (NMS). To accomplish this without violating SONET/SDH standards, a new signal, called a fault isolation signal in the path (FIS-P), is proposed. The FIS-P may be used in lieu of an AIS-P to support special applications on certain digital cross connect (DCS)-to-DCS path segments. Moreover, the present invention may be implemented such that the behavior of path terminating equipment (PTE) is unaffected.

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