Plantronics Calisto Pro Series - Manual (Page 16)

Page 10
Adjusting call volume
Handset Headset
During a call, press up or down to adjust
call volume when you are using your
handset, speakerphone, or headset. Press up (towards the indicator light) or
down (towards the microphone) to adjust
call volume during a call.
Tip: For your comfort and health, always listen to calls at a moderate volume.
For complete safety information, see page 53.
Switching calls between handset, headset, and
speakerphone
To switch call: Do the following:
Handset or Speakerphone ➔
Headset Press the Headset button for
under 1 second or until you hear
a single high beep. The Handset
or Speakerphone key is no longer
illuminated, and
is now displayed
on the screen.
Headset or Speakerphone ➔
Handset Press Handset . The key lights
up when the handset is active.
Handset or Headset ➔
Speakerphone Press Speakerphone . The key
lights up when the speakerphone is
active.