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Architecture for minimum loop current during ringing and caller ID

  • US 6,104,794 A
  • Filed: 03/04/1998
  • Issued: 08/15/2000
  • Est. Priority Date: 04/22/1997
  • Status: Expired due to Term
First Claim
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1. A communication system, comprising:

  • phone line side circuitry for coupling to phone lines;

    powered side circuitry for coupling to the phone line side circuitry through an isolation barrier; and

    phone line side integrated ringer circuitry within the phone line side circuitry, the phone line side integrated ringer circuitry drawing substantially no loop current from the phone line during ringing conditions.

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