Method and apparatus for detecting the presence of a remote device and providing power thereto

CAFC
  • US 5,991,885 A
  • Filed: 06/11/1997
  • Issued: 11/23/1999
  • Est. Priority Date: 06/11/1997
  • Status: Expired due to Term
First Claim
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1. A method of providing electrical power to a device upon the detection of the presence of the device communicating with a network system comprising the steps of:

  • providing a presence request signal by sending a bipolar timing signal to the device providing a response signal from the device;

    detecting the presence of a device on a communication line by receiving the response signal from the device;

    determining the type of device present;

    providing electrical power to the device over the communication line in response to the type of device and the detected presence; and

    stop providing the electrical power to the device when the presence of the device is no longer detected;

    communicating with the device in a first protocol in response to detection of the presence of the device.

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