Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2007-10-23
2007-10-23
Feild, Joseph (Department: 2617)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C370S493000, C370S522000, C455S563000
Reexamination Certificate
active
10133186
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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Eatherly Wayne
Leyendecker Robert
Preston Dan A.
Preston Joseph D.
Proctor Rod L.
Airbiquity Inc.
Mehra Inder Pal
Stolowitz Ford Cowger LLP
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