Patent ID: 8605773

Claim:
A data communication apparatus comprising: a data modulation module couple to a data transmission module operable to: frequency shift keying and frequency shift keying and phase shift keying modulates data to a radio frequency band to generate a modulated data signal; the data transmission module operable to: transmit the modulated data to another communication apparatus; a frequency modulation (FM) module coupled to the data transmission module operable to: frequency modulate and output a voice signal from a service server or a separate input module; a voice transmission module coupled to the frequency modulation (FM) module operable to: transmit the modulated voice signal together with a general radio broadcasting signal; and a mode control module coupled to the voice transmission module operable to: receive a data transmission initiation signal or a voice transmission initiation signal from the service server to switch between a data transmission mode and a voice transmission mode, wherein the mode control module operates the data modulation module in the data transmission mode, and operates the FM module in the voice transmission mode.