Line card-sourced ESF framing protection switch FDL signaling

Details Line card-sourced ESF framing protection switch FDL signaling Line card-sourced ESF framing protection switch FDL signaling

2007-04-10

2007-04-10

Ho, Duc (Department: 2616)

Multiplex communications

Fault recovery

C370S522000, C370S228000, C370S465000

Reexamination Certificate

active

10167012

ABSTRACT:
A back-up channel line card-installed ESF framing mechanism independently sources an FDL signaling channel for the transport of protection switch signaling information, taking advantage of the fact that DSL multiplexer equipment is capable of accepting and processing ESF framed digital data, including embedded FDL-based signaling information. Upon completion of transport of the FDL-based signaling information, the back-up channel is used for data transport in place of a faulty channel.

REFERENCES:
patent: 5224108 (1993-06-01), McDysan et al.
patent: 5506956 (1996-04-01), Cohen
patent: 5513173 (1996-04-01), Machemer et al.
patent: 5566161 (1996-10-01), Hartmann et al.
patent: 5577196 (1996-11-01), Peer

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