Upper layer network device including a physical layer test port

Details Upper layer network device including a physical layer test port Upper layer network device including a physical layer test port

2006-05-30

2006-05-30

Vu, Huy D. (Department: 2665)

Multiplex communications

Diagnostic testing

C370S390000, C370S465000

Reexamination Certificate

active

07054272

ABSTRACT:
The present invention provides an upper layer network device with one or more physical layer data test ports. The data supplied to the test ports reflects the data received by the network device with minimal modification and no upper layer translation or processing, and supplying the data to the test ports does not impact or disrupt the service provided by the network device. Only a small portion of the network device need be operable to send data to the test ports. In addition, the test ports are programmable while the network device is operating and without impacting its operation. Moreover, because the test ports are programmable—that is, they are not dedicated—they may be re-programmed for normal device operation.

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