Plantronics DuoSet H141 Guide D'utilisation page 12

TROUBLESHOOTING
CALLERS CANNOT HEAR ME
For Voice Tube models, determine if the Voice Tube is clogged
or positioned improperly.
For Noise-Cancelling models, make sure the microphone is
positioned properly at the corner of your mouth.
If you have a separate Amplifier, verify that the Speak Volume
is set properly.
If you have a separate Amplifier, verify that the Mute function
has not been activated.
I CANNOT HEAR CALLERS
Verify that the Quick Disconnect Module is connected.
Make sure the Headset Assembly is centered on your ear.
If you have a separate Amplifier, verify that it is installed
correctly.
If you have a separate Amplifier, verify that the Listen Volume
is set properly.
EAR HOOK IS UNSTABLE
Experiment with the insertion of the Ear Hook into the Pivot
Ball Ring.
Rotate the Pivot Ball Ring on the Headset Assembly.
If a comfortable fit cannot be achieved using the Ear Hook,
consider using the Headband.
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