Plantronics MCD100 USB Speakerphone
6
3
Using your MCD100 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 MCD100 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.