Patent ID: 8494573
Filing Date: 2013-07-23
Classification: H04W

Abstract:
1. A radio communication system, comprising: a system computer; a radio communication device comprising a radio communication antenna, a voice communication service comprising a voice communication channel and a data communication service; an audio management system; a user communication device connected to the audio management system; and a data bus connecting the system computer, the radio communication device and the audio management system; wherein a normal operational mode of the radio communication system is the data communication service, wherein said system computer is arranged to switch the radio communication device from said normal operational mode to the voice communication service through the voice communication channel on a predetermined fixed frequency upon receiving a signal from the radio communication device indicating that a carrier on the predetermined fixed frequency has been detected or a signal from the audio management system indicating that a request for a predetermined fixed frequency voice communication service has been detected, and from said voice communication service on a predetermined frequency to said normal operational mode upon receiving a signal from the radio communication device indicating that a carrier on a predetermined fixed frequency has ceased to be detected by said radio communication device or a signal from the audio management system indicating that a request for a predetermined fixed frequency voice communication service has ceased to be detected by said audio management system.