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Now that you’ve configured your headset and connected your desk phone,
read this section to learn about the headset features, how to use the
controls and more.
Headset Controls
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1 Volume/Mute button
Increase the volume
Decrease the volume
Mute/unmute a call
This table describes volume controls if you wear the headset on the right.
The volume controls are opposite if you wear it on the left.
Press the volume button up.
Press the volume button down.
To mute/unmute the headset, press the volume/mute button in.
2 Call control button
Place, answer, end a call Briefly press the call control button.
3 Headset LED Flashes white when in use.
IMPORTANT For your safety, do not use headset at high volumes for extended periods
of time. Doing so can cause hearing loss. Always listen at moderate levels. For more
information on headsets and hearing visit: plantronics.com/healthandsafety.
Talk Time
With a single full charge, the CS540 will provide up to 7 hours of talk time. Talk time will be
reduced when operating in wideband mode or if the headset is used consistently at a far
distance from the base.
Your Headset