Yealink VC400 Administrator's Manual page 116

Administrator's Guide for Yealink Video Conferencing Systems
To configure VPN via the remote control:
Select Menu->Advanced (default password: 0000) ->Advanced Network.
1.
Check the VPN checkbox.
2.
Press the Save soft key to accept the change.
3.
The display device prompts "Reboot now?".
Select OK to reboot the system immediately.
4.
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