Yealink SIP-T4X Provisioning Manual page 59

4. Fill the provisioning server address in the input field.
5. Click the OK button to finish setting a custom option.
6. Click to save the change.
You also can add the option 43. The following shows the detailed processes.
1. Click Named Policies-->Global, right click the blank area on the right of the main
page and then select New Option.
2. Select Standard Options from the pull-down list of Filter.
3. Scroll down and double click 43.
Appendix
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