group ChannelAccessExternalFunctions { // Function definitions. external function xf_transmitVoice( ChannelNumber p_chNr, ColourCode p_cc, Int8 p_dbM ) {...}; external function xf_transmitVoiceToIsfId( ChannelNumber p_chNr, ColourCode p_cc, Int8 p_dbM, Common_ID p_id ) {...}; external function xf_transmitVoiceToCsfGroup( ChannelNumber p_chNr, ColourCode p_cc, Int8 p_dbM, DialString p_groupDialString ) {...}; external function xf_stopTransmittingVoice() {...}; }