Photoelectric cross-connect system

Details Photoelectric cross-connect system Photoelectric cross-connect system

2003-04-29

2008-08-12

Li, Shi K. (Department: 2613)

Optical communications

Fault recovery

Bypass inoperative element

Reexamination Certificate

active

07412164

ABSTRACT:
A photoelectric cross-connect system for an optical-communication system minimizes service recovery time when an error is generated. A plurality of nodes are connected by an optical-transmission line wherein each nodes automatically recognizes a data rate of an input signal and communicates over a redundant channel with an adjacent node when there is a certain type of error. An optical-receiving unit receives an optical signal performs O/E conversion. A main optical-transmitting unit recovers clock and data signals according to the converted signal and sets a data rate according to the converted signal for subsequent transmission; a redundant optical-transmitting unit recovers a clock and data according to the converted signal and sets a data rate according to the converted signal for subsequent transmission A switch provides selectively connection state between the optical-receiving unit and the main optical-transmitting unit and between the optical-receiving unit and the redundant optical-transmitting unit.

REFERENCES:
patent: 5903544 (1999-05-01), Sakamoto et al.
patent: 5982746 (1999-11-01), Hanson et al.
patent: 6498670 (2002-12-01), Yamashita et al.
patent: 2004/0013433 (2004-01-01), Alexander et al.

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