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Signal detection and discrimination using waveform peak factor

  • US 4,696,031 A
  • Filed: 12/31/1985
  • Issued: 09/22/1987
  • Est. Priority Date: 12/31/1985
  • Status: Expired due to Term
First Claim
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1. A call progress analyzer comprising:

  • means for receiving waveforms from a telephone line;

    means defining a peak factor range, said range being associated with a particular signal type;

    measuring means for determining whether peak factors of waveforms received from the telephone line fall within said range and for providing a signal-type indication of said particular signal type in response to a determination that a peak factor falls within said range;

    call status decision logic for receiving said signal-type indication and for determining call status.

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