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Plantronics P420-M USB Speakerphone
8
3 Using your P420-M USB speakerphone
Volume up, volume down and mute
1 Press the down arrow (left button) to decrease the
speaker volume.
2 Press the up arrow (right button) to increase the speaker
volume.
NOTE A prolonged press of the volume buttons will increase
or decrease the volume several levels until you stop pressing
the button. The P420-M will beep when a volume up button or
volume down button is pressed and a series of beeps when a
prolonged press is performed. Each beep signals one level of
volume increase or decrease.
3 Press the microphone icon (middle button) to mute
the microphone. A blue light will flash indicating that the
microphone is muted.
4 Press this button again to unmute. The blue light will
become solid indicating the microphone is unmuted.