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Press Hold keyAlt + F5
Press this on
your keyboard…
To do this on your phone…
Enable or disable Do Not DisturbAlt + F6
Enable of disable Microphone Mute (     )Alt + F7
Press New CallAlt + F8
Press End CallAlt + F9
PressAlt + F11
Press Automatic Call Distribution (ACD) Sign Out (if enabled)Alt + F12
Press Volume Up keyAlt + Up arrow
Press Volume Down keyAlt + Down arrow
TroubleShooting : Why Aren’t My Mouse Pointer
and Cursor Responding ?
If your computer has multiple programs open or is in any way unresponsive, the mouse pointer 
or cursor may not respond as quickly on your phone. Try closing any unnecessary programs.
Starting and Stopping Polycom Desktop Connector
If your system administrator has set up the User Login feature, you can view your personal 
phone settings from any phone in the organization. This means you can access your contact