Yealink SIP-T2XP - Configuring a HTTP Server; Preparing a Root Directory

Yealink IP Phones Auto provisioning Guide
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2. Enter the URL, user name and password of the provisioning server in the Server
URL, User Name and Password fields (the user name and password are optional).
3. Configure the desired update mode.
For more information, refer to Update Mode on page 35.
4. Click Confirm to accept the change.