Alecto FR-58 Mode D'emploi page 75

CHANNEL MONITORING:
This function turns off the noise reduction, allowing you to listen to
weaker broadcasters on the selected channel.
appuyez en même temps
ROGER BEEP:
As soon as you release the PTT button, and thus stop transmitting,
the videophone will send a roger beep tone. Now the other party
knows you're done speaking and he or she can send back.
See page 15 if you prefer to turn this function off.
KEY TONES:
the PTT button. See page 81 if you prefer to turn this function off.
simultaneously press the buttons M and
to switch on the monitor function and then
listen to the channel
shortly press the M button to deactivate this
function
75