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Low power line selection circuit for a telephone

DC
  • US 6,252,957 B1
  • Filed: 10/07/1998
  • Issued: 06/26/2001
  • Est. Priority Date: 10/07/1998
  • Status: Expired due to Term
First Claim
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1. A multi-line telephone system:

  • multiple telephone lines each line including a tip and ring lead pair;

    an energy storage unit that draws a small amount of current from at least one tip and ring lead pair when the phone is in the on-hook condition; and

    a circuit at least partially powered by the energy storage unit that automatically selects from the multiple telephone lines a line with an incoming call when the telephone is put in the off-hook condition wherein more than one of the multiple telephone lines are connectable to a telephone circuit at the same time to provide for a conference call.

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  • 8 Assignments
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