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Yealink T4U Series IP Phones User Guide
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On the T43U/T42U phones, go to Menu >Settings >Basic Settings >Display >Backlight.
2. Select the desired level from the Active Level field.
3. On the T48U/T46U phones, select the desired level from the Inactive Level field.
4. Select the desired time from the Backlight Time field.
5. Select Save.
Adjusting the Screen Contrast
You can adjust the screen contrast of the phone to make it easier to read.
The intensity of screen contrast ranges from 1 to 10 and the highest intensity is 10. It is only available on the T43U
phones.
Procedure
1. Go to Menu >Settings >Basic Settings >Display >Contrast.
2. Select the desired value from the Contrast field.
3. Select Save.
Changing the Language
Your phone supports several languages that you can choose to use on the phone.
Contact your system administrator to find out exactly which languages are supported on your phone.
Procedure
1. Go to Menu >Basic >Language.
On the T43U/T42U phones, go to Menu >Settings >Basic Settings >Language.
2. Select the desired language.
3. Select Save.
The phone language is changed to the selected one.
Time & Date
You can set the time and date manually. The time and date formats are also variable.
Topics
Setting the Time and Date Manually
Changing the Time and Date Format
Setting the Time and Date Manually
If your phone cannot obtain the time and date automatically, you can set it manually.
Procedure
1. Go to Menu >Basic >Time & Date >General >Manual Settings.
On the T48U phones, go to Menu >Basic >Time & Date >General. And then select Manual Settings from the
Type drop-down menu.
On the T43U/T42U phones, go to Menu >Settings >Basic Settings >Time & Date >Manual Settings.
2. Edit the date and time.
On the T46U phones, you can also press the up or down navigation key to select the desired date and time.
3. Select Save.
The time and date set on the phone will be changed accordingly.
Note: After the phone reboots, it will be forcibly switched to obtain the time and date from the NTP server.
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