Pg. 1_______________________________________________________Cisco IP Phone 8831 User GuideDisplay Control Unit (DCU) Sound BaseDisplay Unit FeaturesItem Description1 Phone screen LCD screen that displays conference phone menus and features2 Softkeys Four programmable keys.3 Navigation bar withSelect key2-way Navigation bar and Select key that allows you to scrollmenus and select items on the display.4 Call button LED backlit call button.Press this key to:• Go Off Hook• Answer an incoming call• Obtain a dial tone to initiate a call• Resume a call• Release a call5 Keypad Allows you to dial phone numbers and enter letters.6 Mute button Toggles the Mute feature. A red backlight indicates a call is onmute.7 Volume rocker 2-way rocker switch that raises and lowers the volume of thespeaker.Sound Base FeaturesItem Description1,2,3 LED indicators Three LED indicators provide call status information.4 Mute button Backlit mute buttonYour conference station supports a maximum of 6 calls.