Multiplex communications – Fault recovery – Bypass an inoperative switch or inoperative element of a...
Reexamination Certificate
2002-05-08
2010-10-19
Pham, Chi H (Department: 2471)
Multiplex communications
Fault recovery
Bypass an inoperative switch or inoperative element of a...
Reexamination Certificate
active
07817540
ABSTRACT:
The present disclosure relates an improved cable data switching unit that provides a fail-over system whereby one line card can protect a plurality of US (upstream) or DS (downstream) channel line cards, providing N+1 protection, with one linecard being able to protect N number of working linecards. When a failure is detected in a working linecard, the signals being routed by the failing linecards are re-routed seamlessly to a protect linecard. This disclosure provides for data to be passively routed, providing for data flow even if power is lost.
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Achilleoudis Nicos
Chan Roland
Chapman John T.
Daruwalla Feisal
Meller Richard
Adhami Mohammad S
Cisco Technology Inc.
Patterson & Sheridan LLP
Pham Chi H
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