Customizing Your Phone17You can customize your SIP-T21P IP phone by personally configuring certain settings, forexample, contrast, language and time & date. You can add contacts to the phone’slocal directory manually or from call history. You can also personalize different ringtones for different callers.This chapter provides basic operating instructions for customizing your phone. Topicsinclude: General Settings Audio Settings Contact Management Call History Management System CustomizationsIf you require additional information or assistance with your new phone, contact yoursystem administrator.You can configure the contrast of the LCD screen to a comfortable level.To configure the contrast via phone user interface:1. Press Menu->Settings->Basic Setting->Contrast.2. Press or , or the Switch soft key to increase or decrease the intensity ofcontrast.The default contrast level is 6.3. Press the Save soft key to accept the change or the Back soft key to cancel.Contrast is configurable via web user interface at the path Settings->Preference.