User Guide for T4 Series IP Phones 
viii 
General Settings .................................................................................................................................................... 45 
Wallpaper ............................................................................................................................................................. 45 
Configuring Transparency ............................................................................................................................. 48 
Screen Saver........................................................................................................................................................ 49 
Power Saving ...................................................................................................................................................... 53 
Logo Customization ......................................................................................................................................... 56 
Configuring the Backlight .............................................................................................................................. 57 
Configuring the Contrast ............................................................................................................................... 58 
Changing the Language ................................................................................................................................. 58 
Time & Date ........................................................................................................................................................ 59 
Changing the Administrator Password .................................................................................................... 62 
Configuring Key As Send ............................................................................................................................... 63 
Phone Lock .......................................................................................................................................................... 63 
Audio Settings ........................................................................................................................................................ 67 
Adjusting the Volume ..................................................................................................................................... 67 
Ring Tones ........................................................................................................................................................... 68 
Configuring the Key Tone ............................................................................................................................. 70 
Contact Management ......................................................................................................................................... 71 
Configuring List(s) for the Directory (Dir) Soft Key ............................................................................. 71 
Local Directory ................................................................................................................................................... 72 
Blacklist ................................................................................................................................................................. 82 
Mobile Contacts ................................................................................................................................................ 84 
Remote Phone Book ........................................................................................................................................ 86 
Call History Management .................................................................................................................................. 87 
Viewing History Records ................................................................................................................................ 88 
Placing a Call from History Records .......................................................................................................... 88 
Adding a Contact to the Local Directory/Blacklist ............................................................................... 88 
Deleting History Records ............................................................................................................................... 89 
Disabling History Record ............................................................................................................................... 90 
DSS Keys ................................................................................................................................................................... 90 
Line Keys ............................................................................................................................................................... 91 
Programmable Keys ....................................................................................................................................... 102 
Dial Plan .................................................................................................................................................................. 104 
Configuring the Replace Rule .................................................................................................................... 105 
Configuring the Dial Now............................................................................................................................ 106 
Configuring the Area Code ......................................................................................................................... 108 
Configuring the Block Out .......................................................................................................................... 109 
Basic Call Features ...................................................................... 111 
Switching among the Handset, Speakerphone and Headset Modes ............................................ 111 
Placing Calls .......................................................................................................................................................... 112 
Placing a Call .................................................................................................................................................... 112 
Placing Multiple Calls .................................................................................................................................... 113 
Placing a Call Using a Speed Dial Key .................................................................................................... 113 
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