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Dial pulse selection

  • US 4,924,501 A
  • Filed: 03/30/1989
  • Issued: 05/08/1990
  • Est. Priority Date: 11/25/1985
  • Status: Expired due to Term
First Claim
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1. A method of detecting dial pulse signalling data in a received signal comprising the steps of:

  • performing a training process to train a dial pulse detector by processing a known dialled signal to extract information relating to the timing of the dialled pulses in a known dialled digit; and

    performing a recognition process by using said information to assist said detector in detecting dial pulse signalling data in the received signal, wherein said information includes measured values for a maximum make pulse level, a maximum break pulse level, a make period, a break period, and a total dial pulse period.

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