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Power switching in a two-wire conductor system

  • US 9,772,665 B2
  • Filed: 12/11/2013
  • Issued: 09/26/2017
  • Est. Priority Date: 10/05/2012
  • Status: Active Grant
First Claim
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1. A power switching circuit of a communication device for use in a bi-directional two-wire communication system, comprising:

  • an upstream coupling circuit to couple the communication device to an upstream communication device via an upstream pair of wires, wherein the upstream coupling circuit is to receive data and power from an electrical signal transmitted to the communication device from the upstream communication device over the upstream pair of wires; and

    a downstream coupling circuit to couple the communication device to a downstream communication device via a downstream pair of wires, wherein the downstream coupling circuit is to provide data and power over the downstream pair of wires to the downstream communication device according to a nominal power switching procedure;

    wherein the power switching circuit is to detect one or more faults in the communication system before, during and after the nominal power switching procedure, and to modify the nominal power switching procedure in response to detection of one or more faults; and

    wherein the nominal power switching procedure includes a gradual increase of current provided to the downstream pair of wires.

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