Jabra pro 920 features, 1 headset multi-function button, 2 headset speaker volume buttons – Jabra PRO 920 User Manual User Manual
Page 15: 3 headset mute button, 2 set the microphone volume

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english
4.2 SET THE mICROPHONE VOLUmE
1. Put on the headset.
2. Get a dial tone by pressing the
headset button on the desk
phone, or by lifting the desk phone
handset.
3. Make a test call. Call a friend or
colleague to test your speaking
volume. ensure the listener does
not adjust their own volume.
4. adjust the microphone volume
using the microphone + / - volume
buttons, as illustrated, if your
speaking volume is too loud or too
quiet for the listener.
5. When the microphone volume is
set, end the call.
note: to reset the microphone
volume to the factory default setting,
make a call and then press and hold
both microphone + / - volume buttons
until a tone is played, and then release
the volume buttons.