Optical communications – Fault recovery – Bypass inoperative element
Reexamination Certificate
2006-09-05
2006-09-05
Vanderpuye, Kenneth (Department: 2613)
Optical communications
Fault recovery
Bypass inoperative element
C398S012000, C398S019000, C398S045000, C398S048000, C398S050000, C398S051000, C398S055000, C398S056000, C370S219000, C370S220000, C307S407000, C307S408000, C307S409000, C307S410000, C307S411000, C361S778000
Reexamination Certificate
active
07103274
ABSTRACT:
An apparatus having n-number of working cross-connects for cross-connecting an n-bit input signals arriving from a plurality of input paths on a per-bit basis; n-number of first logic circuits for calculating the exclusive-ORs of each said n-bit and applying outputs to a standby cross-connect for providing outputs; n-number of second logic circuits for calculating the exclusive-ORs of said output signals from each of said working cross-connects and from the single standby cross-connect; and third logic circuits for selecting output signals of said working cross-connects and outputs of the second logic circuits. The apparatus detects the occurrence of an abnormality in working cross-connects by monitoring the outputs of the second logic circuits, identifies the faulty cross-connect by successively turning off one of the n-inputs to the first and second logic circuits, and select outputs from the second logic circuits instead of from the faulty cross-connect by using the third logic circuits.
REFERENCES:
patent: 5040170 (1991-08-01), Upp et al.
patent: 5193087 (1993-03-01), Lichtash et al.
patent: 5218465 (1993-06-01), Lebby et al.
patent: 5754320 (1998-05-01), Watanabe et al.
patent: 5859776 (1999-01-01), Sato et al.
patent: 5937117 (1999-08-01), Ishida et al.
patent: 6441935 (2002-08-01), Araki et al.
patent: 6829436 (2004-12-01), Koh et al.
patent: 9-46735 (1997-02-01), None
patent: 9-238370 (1997-09-01), None
patent: 10-210511 (1998-08-01), None
patent: 10-257580 (1998-09-01), None
Egoshi Hiroya
Kunimatsu Kazuhiro
Miyazaki Yukiko
Takayasu Akio
Fujitsu Limited
Katten Muchin & Rosenman LLP
Leung Danny Wai Lun
Vanderpuye Kenneth
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