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PHONE TROUBLESHOOTING
LCD Screen/Display
DT820 Phone User Guide 11 -181
Note: If you cannot restart the phone using the Menus, unplug the phone from power
and the network for ten seconds, then reconnect the telephone to your
network and power to perform a restart.
4 If you are still having problems with your phone, contact your system administrator.
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LCD SCREEN/DISPLAY
The LCD is too light or dark
• Press the Menu key and select 3 User Settings, 6 LCD Settings, 1 LCD Contrast,
then use the softkeys to adjust the LCD contrast.
I want to adjust the time the LCD stays lit
You can adjust the timeout of the LCD backlight on your phone. You can specify a
value between 0 (None) to 255 seconds.
1 Press the Menu key.
2 Select 3 User Settings.
3 Select 6 LCD Settings.
4 Select 2 LCD Backlight Timeout.
5 The default backlight timeout, in seconds, for your system is shown. To change the
timeout, press the Delete softkey and use the telephone keypad to enter new backlight
timeout.
6 Press Enter b on the cursor pad or the OK softkey to accept the setting.
You can also press the Cancel softkey to exit without making any changes.
Note: Setting the Backlight Timeout to 0 (zero) disables the timeout, and the LCD
Backlight will remain lit at all times.
I need to reset the language on my phone
The language on your phone may reset to either the default for your system or the
default for the phone (English) when you restart the phone, depending on the
configuration of your system.
1 Press the Menu key.
2 Select 3 User Settings.
3 Select 4 Language.
4 Select the desired language and press Enter b on the cursor pad or the OK softkey to
accept the setting.
The new menu screens will now display in the language you have selected. You do
not need to restart the phone to change the language.
You can also press the Cancel softkey to exit without making any changes.
Note: The default language on the phone is English.
The Call History information on my phone is gone
Call History information (Missed, Received and Placed Calls) is deleted when the
phone is restarted. If you did not reboot your phone, your phone may have been
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