User Guide for T4 Series IP Phones
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For the SIP-T42S/T42G/T41S/T41P/T40G/T40P IP phone, navigate to
Menu->Settings->Basic Settings->Display->Backlight.
2. For the SIP-T48S/T48G/T46S/T46G IP phone, select the desired level from the Active Level
field.
3. For the SIP-T48S/T48G/T46S/T46G IP phone, select the desired value from the Inactive
Level field.
4. Select the desired time from the Backlight Time field.
5. Press Save.
Backlight is configurable via web user interface at the path Settings->Preference.
Configuring the Contrast
You can configure the LCD screen contrast to a comfortable level for the SIP-T40G/T40P IP
phone. The level ranges from 1 to 10 and 10 is the highest level.
Procedure:
1. Navigate to Menu->Settings->Basic Settings->Display->Contrast.
2. Select the desired value in the Contrast field.
3. Press Save.
Contrast is configurable via web user interface at the path Settings->Preference.
Changing the Language
The default language of the phone user interface is English. If the language of your web browser
is not supported by the phone, the web user interface will use English by default. You can
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