Cable tester

Details Cable tester Cable tester

2011-03-15

2011-03-15

Valone, Thomas (Department: 2831)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

C324S534000, C324S527000, C324S543000

Reexamination Certificate

active

07906973

ABSTRACT:
A physical layer module (PHY) of a network device includes a control module and a cable-test module. The control module selectively generates a cable-test enable signal to test a cable including four pairs of twisted wire. The cable-test module tests the cable based on the cable-test enable signal. The cable-test module transmits test signals on the four pairs at a first time and receives return signals. The cable-test module determines that the cable is not faulty when the return signals received on first and second pairs of the four pairs have an amplitude less than a first predetermined amplitude, and when the return signals received on third and fourth pairs of the four pairs have an amplitude greater than a second predetermined amplitude and are received substantially contemporaneously.

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