Yealink IP Phones Auto Provisioning Guide 
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An example of configuration on the Windows platform is shown as below: 
 
Configuring a TFTP Server 
If you have a 3CDaemon application installed on your local system, use it directly. Otherwise, 
download and install it. 
To configure a TFTP server: 
1.  Double click 3CDaemon.exe to start the application. 
A configuration page is shown as below: