Yealink VC400 Administrator's Manual page 263

The safe mode call parameters on the system are described below:
Parameter
Enables or disables the safe mode
call feature for H.323 incoming call
from public network.


Safe Mode Call
Default: Enabled
Note:
reject H.323 incoming call from
public network. If it is disabled, any
H.323 incoming call from public
network can be accepted.
To configure safe mode call via web user interface:
Click on Setting->Call Features.
1.
Select the desired value from the pull-down list of Safe Mode Call.
2.
Click Confirm to accept the change.
3.
Description
Disabled—do not use safe
mode call.
Enabled—use safe mode call.
f it is enabled, the system will
I
Configuring Security Features
Configuration Method
Web User Interface
247