How to use the navigation keys 21Contrast and brightnessUse the Contrast and Brightness option to adjust these levels of thedisplay, and to reset the sleep timer. To extend the life of the touch paneldisplay, the IP Phone uses a sleep timer, which turns off the backlightwhen the preset time elapses.See “Adjusting the contrast and brightness of the display” (page 53) and“Adjusting the sleep timer” (page 89).USB devicesUse the USB Devices option to view information about the deviceconnected to the USB port.USB devices are not supported in release (I)SN09FF.TFTP upgradeUse the TFTP option to upgrade the firmware. This tool is used byadministrators only.See “Performing a firmware upgrade” (page 75).PreferencesUse the Preferences option to access the Button Customizing Tool. Usethe Button Customizing Tool to change the look of the dedicated featurekeys.See “Using the Preferences tool” (page 91).How to use the navigation keysThe IP Phone terminal has four keys that you use to navigate the menus,and to help you to enter text in the display. See Figure 1 "IP Phone 2007components" (page 9) for the location of these keys.When the menu system is active, the navigation keys behave this way:• up key—return to the previous menu item• down key—got to the next menu item• left/right key—active when you can enter text. To move the cursor tothe left, press the left key. Press the right key to move the cursor tothe right.After you select an option, you can press Ok on the touch screen toexecute the selection.Carrier VoIPNortel IP Phone 2007 User Guide (CICM)NN10300-020 02.03 Standard7 March 2008Copyright © 2007, 2008 Nortel Networks.
