Click the Enhanced services.
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Click the Directory / BLF List check box and click the Save button in order to enable this
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feature.
Click the Directory / BLF List Edit button.
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Enter the user's Extension number and click the BLF check box.
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Click the Save button.
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Phone Settings
Log in to the phone's web administration interface
Open a new browser window and enter your phone IP address in order to access the phone's
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web administration interface login screen. Example: http://192.168.1.22.
Log in to the phone's web administration interface with your username and password. Please
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note that the factory default login details are as follows: username is admin and password is
admin.
Click Phone.
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Click DSS Keys.
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Configure 1 to 10 DSS Keys from the list.
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Type: Select BLF.
Value: Enter the user's Extension. Example: 1005
Click the Confirm button to save changes.
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Additional Configuration Template
If you want to include some additional UAD configuration for Yealink T42U, just add fields to
User Agent General Auto Provisioning Template in the Settings -> UAD -> Yealink T42U
menu, or add them directly to the Extension in the UAD Auto Provisioning Template section.