Ring type fiber optic protection

Details Ring type fiber optic protection Ring type fiber optic protection

2006-11-21

2006-11-21

Chan, Jason (Department: 2633)

Optical communications

Fault recovery

Bypass inoperative element

C398S154000, C398S201000, C398S155000

Reexamination Certificate

active

07139475

ABSTRACT:
An optical receiver is provided with inputs for receiving two fiber optic lines. The two fiber optic lines carry redundant data. An optical interface passes the respective signals therein to a comparison unit. The comparison unit compares the signals and determines which has the better quality and passes the better quality signal on to a processing interface. Clock data for operating the comparison unit is extracted from the optical signals.

REFERENCES:
patent: 4306313 (1981-12-01), Baldwin
patent: 4451916 (1984-05-01), Casper et al.
patent: 5229875 (1993-07-01), Glista
patent: 6317414 (2001-11-01), Naohiro

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