Yealink SIP-T4X Administration Manual page 222

3. Select the desired value from the pull-down list of Common Name Validation.
4. Select the desired value from the pull-down list of CA Certificates.
5. Click Confirm to accept the change.
A dialog box pops up to prompt that the settings will take effect after reboot.
6. Click OK to reboot the IP phone.
To configure TLS on a per-line basis via web user interface:
1. Click on Account.
2. Select the desired account from the pull-down list of Account.
3. Select TLS from the pull-down list of the Transport.
4. Click Confirm to accept the change.
Configuring Security Features
207