System and method for providing a link quality monitor for a...

Details System and method for providing a link quality monitor for a... System and method for providing a link quality monitor for a...

2011-01-04

2011-01-04

Ferris, Derrick W (Department: 2463)

Multiplex communications

Diagnostic testing

Determination of communication parameters

Reexamination Certificate

active

07864694

ABSTRACT:
A system and method is disclosed for monitoring the quality of a data link in a 100 Mb Ethernet physical layer device. A link quality monitor detects operational values of data link parameters such as digital equalizer C1 coefficient, digital adaptive gain control, digital base line wander, recovered clock long-term frequency offset, and recovered clock frequency control. When an operational value of a data link parameter exceeds a high or low threshold value, the link quality monitor sends a drop link signal to cause the current data link to be dropped and a new data link established.

REFERENCES:
patent: 6452975 (2002-09-01), Hannah
patent: 2003/0134607 (2003-07-01), Raghavan et al.
patent: 2003/0169192 (2003-09-01), Jonsson
patent: 2004/0095901 (2004-05-01), Rajkotia
patent: 2005/0128998 (2005-06-01), Jelitto et al.
patent: 2007/0021087 (2007-01-01), Turner

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