Physical layer loop back method and apparatus

Details Physical layer loop back method and apparatus Physical layer loop back method and apparatus

2006-10-17

2006-10-17

Iqbal, Nadeem (Department: 2114)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C709S224000

Reexamination Certificate

active

07124330

ABSTRACT:
The network device includes a transceiver, a pattern generation unit and a pattern recognition unit. The transceiver connects to a communications medium. The pattern generation unit connects to the transceiver. The pattern generation unit is configured to generate a first code word in response to a self-test signal. The pattern recognition unit connects to the communications medium and a network entity. The pattern recognition unit is configured to receive the first code word from the transceiver and to determine whether the first code word includes a loop back pattern. The pattern recognition unit is configured to generate a second code based upon the first code word and to include in the second code word a pattern different from the first code word.

REFERENCES:
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patent: 6628621 (2003-09-01), Appleton et al.
patent: 2002/0184363 (2002-12-01), Viavant et al.
patent: 2003/0025960 (2003-02-01), Benvenuti et al.
patent: 2003/0149921 (2003-08-01), Lau et al.

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