Multiplex communications – Fault recovery – Bypass an inoperative channel
Reexamination Certificate
2011-03-01
2011-03-01
Pham, Chi H (Department: 2471)
Multiplex communications
Fault recovery
Bypass an inoperative channel
C370S236000, C370S244000, C370S248000, C370S258000, C370S392000, C370S469000, C370S474000, C370S907000
Reexamination Certificate
active
07898944
ABSTRACT:
Methods and apparatus for efficiently allowing protection switch information to be communicated on bidirectional lines are disclosed. According to one aspect of the present invention, a method for communicating protection switch information from a first network element to a second network element across bidirectional links that include at least one working line and a protection line involves obtaining a generic framing procedure GFP frame at the first network element. The GFP frame has a payload area with a client payload field. The method also includes defining a command field associated with the GFP frame that is in the payload area but not in the client payload field, and storing protection switch information in the command field.
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Bianchi David
Loprieno Gilberto
Tandi Giovanni
Cisco Technology Inc.
Elallam Ahmed
Pham Chi H
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