Method and apparatus for detecting and supplying power by a...

Details Method and apparatus for detecting and supplying power by a... Method and apparatus for detecting and supplying power by a...

2007-04-02

2009-06-23

Elamin, Abdelmoniem (Department: 2116)

Electrical computers and digital processing systems: support

Computer power control

By external command

C713S300000, C713S320000, C713S321000, C713S322000, C713S323000, C713S324000, C713S330000, C713S340000, C379S322000, C379S413000, C709S223000, C709S238000

Reexamination Certificate

active

07552348

ABSTRACT:
A first network device comprises first and second transformers that communicate with a second network device. A switch selectively connects power to the first and second transformers. A physical layer device communicates with the first and second transformers and includes a signal generator, a detector, and a controller that communicates with the switch, the signal generator and the detector. The signal generator generates a test signal comprising n sub-pulses, where n is an integer greater than 2. When the detector detects j pulses that are greater than a predetermined threshold, 1≦j<n, the controller supplies power to the second network device, where j is an integer.

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