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Power subsystem for a communication network containing a power bus

  • US 6,243,818 B1
  • Filed: 09/06/2000
  • Issued: 06/05/2001
  • Est. Priority Date: 05/02/1997
  • Status: Expired due to Term
First Claim
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1. A data processing system comprising in combination:

  • a single network bus containing data transmission lines and a network power line;

    a first power supply unit connected to the network power line;

    a a first network load connected to the first power supply;

    a second network load connected to the network power line;

    a second power supply unit connected to the second network load; and

    power selection circuit connected between the second power supply unit and the network power line for selecting the second power supply unit to power the second network load, and for instantaneously selecting the network power line to power the second network load upon removal or failure of power by the second power supply unit.

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