Multiplex communications – Diagnostic testing – Loopback
Reexamination Certificate
2011-08-30
2011-08-30
Phan, Tri H (Department: 2471)
Multiplex communications
Diagnostic testing
Loopback
C370S282000, C370S463000, C375S221000
Reexamination Certificate
active
08009571
ABSTRACT:
A method, system and apparatus are provided for detecting a loop-back in a physical layer on an Ethernet link. In the physical layer, a device sends a base page on the Ethernet link. The base page has at least one next page capability bit set. Subsequently, the device receives a received base page. Thereafter, for detecting the loop-back, the next page capability bit is set in the received base page is determined.
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Arunachalam Saravan
Barrass Hugh
Cisco Technology Inc.
Fish & Richardson P.C.
Phan Tri H
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