Cellular telephone having improved in-band signaling for data communications over digital wireless telecommunications networks
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United States of America Patent
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May 22, 2007
Grant Date -
Jul 18, 2002
app pub date -
Mar 6, 2002
filing date -
May 19, 1997
priority date (Note) -
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Abstract
An inband signaling modem communicates digital data over a voice channel of a wireless telecommunications network. An input receives digital data. An encoder converts the digital data into audio tones that synthesize frequency characteristics of human speech. The digital data is also encoded to prevent voice encoding circuitry in the telecommunications network from corrupting the synthesized audio tones representing the digital data. An output then outputs the synthesized audio tones to a voice channel of a digital wireless telecommunications network.
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