06690681 is referenced by 125 patents and cites 8 patents.

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.

Title
In-band signaling for data communications over digital wireless telecommunications network
Application Number
9/531367
Publication Number
6690681 (B1)
Application Date
March 21, 2000
Publication Date
February 10, 2004
Inventor
Rod L Proctor
Seattle
WA, US
Wayne Eatherly
Puyallup
WA, US
Robert Leyendecker
Aloha
OR, US
Joseph Preston
Bainbridge Island
WA, US
Dan A Preston
Bainbridge Island
WA, US
Agent
Stoel Rives
US
Assignee
Airbiquity
WA, US
IPC
H04J 1/02
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