Circuitry for activating a modem in a cellular telephone
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United States of America Patent
Stats
-
Jan 20, 2004
Grant Date -
N/A
app pub date -
Jul 25, 2000
filing date -
Mar 21, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A wireless telecommunication device, such as a cell phone, is coupled to a source of digital data which may comprise a GPS receiver. In one embodiment, a GPS receiver and inband signaling modem are integrated into the cell phone battery pack. A pushbutton on the battery pack is actuated by a user to trigger selected events such as formulating location data in the GPS receiver, encoding the location data in the IBS modem and inserting the resulting audio frequency tones into the voice channel of the cell phone for transmission over the voice channel of a digital, wireless telecommunications network.
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