TANDBERG 880 MXP Basic Use Manuallines page 18

Audio Functions

Mute: To turn your microphone on/off
during a call, press the "Mic Off" key. An
on screen indicator
both sides when the microphone is off.

During a point-to-point call, far side will
get a message "Microphone OFF at
other side" whenever you "Mute"

The 'Mic Off': symbol
voice activity is detect in your room ....
this, then, also provide another another good way to
test your microphone connectivity
will appear on
flashes when
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