Out-of-band signalling apparatus and method for an optical...

Details Out-of-band signalling apparatus and method for an optical... Out-of-band signalling apparatus and method for an optical...

2005-11-22

2005-11-22

Chin, Wellington (Department: 2664)

Multiplex communications

Pathfinding or routing

Through a circuit switch

C398S050000

Reexamination Certificate

active

06967948

ABSTRACT:
A signaling architecture for a cross connect switch utilizes out-of-band communications channels to transmit status information from line modules to the switch module. The out-of-band communication channels are separate from the in-band payload data connections routinely used to connect line modules to the switch module. A framer is used to extract payload data for transmission on the in-band payload data connections. The framer also extracts status information that may be encoded before sending to the switch module via the out-of-band communications channels. The switch module logically pairs STS-1s into working/protect pairs and utilizes the STS-1 granular status information to decide which of the pair is a better copy which is output as the working copy after the cross-connect switch fabric is configured according to user demands. A redundant switch module may also be used for equipment protection.

REFERENCES:
patent: 5452306 (1995-09-01), Turudic et al.
patent: 6137800 (2000-10-01), Wiley et al.
patent: 6172977 (2001-01-01), Christie et al.
patent: 2001/0056512 (2001-12-01), Mok et al.
Notification of Transmittal of the International Search Report or the Declaration, dated Jun. 4, 2004, for PCT/US03/33196.

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