Plantronics Discovery 975 User Manual page 16

Earpiece Controls and Indicators
Action
Enabling or Press volume button
disabling mute for 1 second.
(during an active
call)
Adjust the Tap the volume button once for
volume (during an each volume increment. After
active call) reaching max volume, tapping again
will drop the volume to the lowest
setting.
WARNING Do not use the earpiece at high volumes for an extended period of time. Doing so can cause
hearing loss. Always listen at moderate levels. See www.plantronics.com/healthandsafety for more
information on earpieces and hearing.
DURATION: TAP is under 1 second. PRESS is 1-4 seconds as directed.
Light Tone
None Mute on: sequence starts
with the low-high tones plus
voice prompt "Mute On" (in
English). 15 minutes later just
the low-high tones advise
status. Full sequence repeats
every 30 minutes until Mute is
de-activated.
Mute off: high-low tones
followed by voice prompt
"Mute Off" (in English).
One white flash for One low tone for each volume
every volume level increment change; 2 low tones
change. at maximum volume.
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