Yealink SIP-T2 SERIES Administrator's Manual page 722

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
3. Click Upload to upload the TAR file.
The web user interface prompts the message ―Import config...‖.
4. In the VPN block, select the desired value from the pull-down list of Active.
5. Click Confirm to accept the change.
A dialog box pops up to prompt that settings will take effect after a reboot.
6. Click OK to reboot the phone.
To configure VPN via phone user interface after uploading a TAR file:
1. Press Menu->Settings->Advanced Settings (default password: admin)
->Network->VPN.
2. Press
Active field.
You must upload the OpenVPN TAR file using configuration files or via web user
interface in advance.
3. Press the Save soft key to accept the change.
The IP phone reboots automatically to make settings effective after a period of
time.
Voice quality monitoring feature allows the IP phones to generate various quality
metrics for listening quality and conversational quality. These metrics can be sent
between the phones in RTCP-XR packets. These metrics can also be sent in SIP PUBLISH
700
or , or the Switch soft key to select the desired value from the VPN