Optical communications – Fault recovery – Bypass inoperative element
Reexamination Certificate
2004-02-05
2008-11-04
Chan, Jason (Department: 2613)
Optical communications
Fault recovery
Bypass inoperative element
C398S059000, C370S223000, C370S224000, C370S376000, C370S907000
Reexamination Certificate
active
07447429
ABSTRACT:
A bidirectional line switched ring network which enables high-speed operation with improved reliability because of a reduced software processing load is disclosed, and the network includes a plurality of optical transmission equipment sets connected in a ring form, wherein optical transmission equipment provided in a node on the transmission side performs transmission to each lower-order channel by attaching a transmission-side node ID, and, optical transmission equipment provided in a node on the reception side collates the received transmission-side node ID with an expected value of the transmission-side node ID having been set in advance, and when the collation does not match, the optical transmission equipment in the node on the reception side prevents a misconnection in the event of a failure by inserting an alarm indication signal.
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Tazawa Hideaki
Yamaguchi Naoki
Chan Jason
Fujitsu Limited
Katten Muchin & Rosenman LLP
Leung Danny W
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