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Digital wireless voice and data modem

  • US 7,411,982 B2
  • Filed: 07/31/2007
  • Issued: 08/12/2008
  • Est. Priority Date: 05/24/2002
  • Status: Expired due to Fees
First Claim
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1. A method of substantially simultaneous transmission of voice content and data over a single voice channel of a digital wireless telecommunications system, a voice channel call being established between first and second stations, and the method comprising the steps of:

  • partitioning the voice channel so as to comprise at least two logical bands, including a voice band and a control band, all within the audio range of frequencies;

    transmitting voice content from the first station to the second station over the voice band of the voice channel;

    while transmitting voice content, monitoring the voice content to detect a lull; and

    responsive to detecting a lull in the voice content, transmitting a control tone in the control band of the voice channel to signal the second station to receive data;

    and then sending data to the second station while continuing to simultaneously transmit voice content over the voice band of the voice channel.

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