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Dual-mode detection of powered device in power over ethernet system

  • US 20060164775A1
  • Filed: 10/19/2005
  • Published: 07/27/2006
  • Est. Priority Date: 01/25/2005
  • Status: Active Grant
First Claim
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1. A system for providing power to a Powered Device (PD), comprising:

  • PD detection circuitry for detecting the PD in a first mode by providing detection current to probe the PD, and in a second mode by providing detection voltage to probe the PD, and a control circuit for determining that the PD is a valid device if the PD is detected both in the first mode and in the second mode.

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