Patent ID: 7813763

Claim:
A method for disabling radio frequency (“RF”) signal transmissions from a global positioning system (“GPS”) modem operatively mounted in a motor vehicle, said GPS modem comprising an RF transmitter, a microprocessor, a memory, at least one external signal input port and at least one output signal port, said GPS modem further configured for storing user-defined parameters for the operation of said GPS modem, said method being embodied on a computer-readable medium such that, when implemented on a general purpose computer operatively connected to said GPS modem, said general purpose computer is capable of programming said GPS modem to carry out the method of disabling RF signal transmissions therefrom upon receiving a modem disable signal on said at least one external signal input port, the computer-readable medium characterized by: a) a code segment for determining if the ignition of said vehicle is turned off; b) a code segment for determining if the ignition of said vehicle is turned on and if said vehicle is stationary; c) a code segment for determining if the ignition of said vehicle is turned on and if said vehicle is moving; and d) a code segment for disabling RF signal transmissions from said GPS modem if a modem disable signal is received on said at least one external signal input port.