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Powered device interface circuit

  • US 7,145,439 B2
  • Filed: 10/12/2004
  • Issued: 12/05/2006
  • Est. Priority Date: 10/16/2003
  • Status: Active Grant
First Claim
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1. A method for communicating multi-bit data from a powered device interface associated with a powered device to power sourcing equipment, the method comprising:

  • exhibiting a signature indicative of a powered device to be powered over communication cabling;

    sensing a voltage level indicative of remote powering over the communication cabling; and

    prior to connecting power to operational circuitry of said powered device, transmitting multi-bit information, responsive to said sensed voltage level, from the powered device interface to the power sourcing equipment over the communication cabling.

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