Patent ID: 8346227

Claim:
A memory device having instructions stored thereon that, in response to execution by a processing device, cause the processing device to perform operations comprising: transmitting communications to pass through a Bluetooth connection between a navigation device and a mobile phone and a wireless voice channel of a wireless telecommunications network associated with the mobile phone; inputting a digital bit sequence into a modulator to generate an audio signal that has different frequency tones for different bit values, wherein the frequency tones are selected to pass through the wireless voice channel unobstructed by vocoders operating within the wireless telecommunications network; using the modulator, generating and sending a first transmission according to a first transmit-side power gain amount; using the modulator, generating and sending a second transmission according to a second different transmit-side power gain amount; receiving back a response indicating receive-side power gain amounts for the first and second transmissions; determining a third transmit-side power gain amount by analyzing the response; using the modulator, generating and sending a third transmission according to the third transmit-side power gain amount; discovering a Bluetooth client identifier for the mobile phone; and generating an entry in a navigation device table to associate the discovered Bluetooth client identifier with the third transmit-side power gain amount.