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In-band signaling for data communications over digital wireless telecommunications network

  • US 6,690,681 B1
  • Filed: 03/21/2000
  • Issued: 02/10/2004
  • Est. Priority Date: 05/19/1997
  • Status: Expired due to Term
First Claim
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1. An inband signaling modem for communicating digital data over a voice channel of a telecommunications network comprising:

  • an input for receiving digital data;

    an encoder for converting the digital data into audible tones that synthesize frequency characteristics of human speech and prevent voice encoding circuitry in the telecommunications network from corrupting the digital data represented by the synthesized audio tones; and

    an output for outputting the synthesized audio tones to a voice channel of a digital wireless telecommunications network;

    wherein the encoder includes;

    a packet formatter for formatting the digital data into inband signaling packets including sacrificial bits; and

    a modulator for converting bits in the inband signaling packets into the synthesized tones.

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