System and method for transmitting data over an audio communication link

A system for transmitting data over an audio communication link, including a first communication device and second communication device, comprising:

• the first communication device, comprising;
• a first data storage medium;
• a first transceiver that converts an audio tone sequence to a digitized audio sequence and transmits the digitized audio signal from the first device to the second device over the audio communication link;
• a first digital-audio data converter that generates an audio tone sequence from digital data, the data converter having an input for receiving data from the data storage medium and an output for outputting the audio tone sequence, the output audio tone sequence corresponding to the received input data,
• wherein the first communication device transmits an audio notification sequence to the second communication device;
• the second communication device, comprising;
• a second data storage medium;
• a second transceiver that receives the digitized audio sequence from the first device over the audio communication link, and converts the digitized audio signal to the audio tone sequence;
• a second digital-audio data converter that generates the digital data corresponding to the audio tone sequence, the second digital-audio data converter having an output for outputting data to the data storage medium and an input for receiving the audio tone sequence from the second transceiver, the input audio tone sequence corresponding to output data;
• and
• the audio communication link being a wireless, short-range communication link for transmitting the digitized audio signal,
• wherein the first communication device and the second communication device each operate in either an audio mode or in a data-over-audio mode, such that the second communication device switches from the audio mode to the data-over-audio mode after receiving the audio notification sequence and the first device switches from the audio mode to the data-over-audio mode prior to transmitting the audio notification sequence, and
• wherein the audio tone sequence includes an appended termination tone sequence that indicates a completed data-over-audio transmission and that triggers the second communication device to switch from the data-over-audio mode to the audio mode.