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Method and apparatus for use in supplying power over a telephone line

  • US 10,110,755 B2
  • Filed: 12/24/2014
  • Issued: 10/23/2018
  • Est. Priority Date: 12/31/2013
  • Status: Active Grant
First Claim
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1. A reverse power supply unit for supplying electrical power from a customer premises device to an access node via a twisted copper pair, the reverse power supply unit comprising:

  • a processor and a memory comprising a power consumption signature detector operable to detect if power drawn from the reverse power supply unit corresponds to a signature power consumption pattern indicative of a telephony device being in or transitioning into an off-hook state when connected directly to the reverse power supply unit and not being connected via a current limiting interface, wherein detection of a rate of increase of current consumption above a predetermined threshold amount corresponds to detection of the signature power consumption pattern indicative of a telephony device being in or transitioning into an off-hook state when connected directly to the reverse power supply unit and not being connected via a current limiting interface.

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