там еще такая хелпа есть

radio HELP
--- Radio chatter commands ---
--- Command : values - description ---
TEST    : on - test (hear) microphone input (network transmission disabled), off - end test
LEVEL   : 1.0..5.0 number - voice activation level for auto voice activation (see MODE)
LATENCY : 0.2..2.0 number - output buffer latency in seconds, bigger values increases delay in messages and decrases drop-outs in audio
CODEC   : lpc or hq - codec type for new channels; lpc - for dialup connection or hq - for LAN one channel cannot have multiple codecs for different users
MODE    : auto or manual - PTT mode - 'press to talk' or auto voice activation(see LEVEL)
PTT     : on or off - in auto mode 'on' mutes voice input, in manual - enables, until called 'radio PTT off'
AGC     : on or off - usage of automatic gain control of microphone
HRCH    : on or off - enable/disable high baudrate codec on this computer
--- end ---


интересно, как на клавишу забандить включение звука (PTT)