Draytek Vigor2920n User Manual page 255

Click any index number to display the dial plan setup page.
Enable
Call Direction
Barring Type
Specific URI/URL or
Click this to enable this entry.
Determine the direction for the phone call, IN – incoming call,
OUT-outgoing call, IN & OUT – both incoming and outgoing
calls.
Determine the type of the VoIP phone call, URI/URL or
number.
This field will be changed based on the type you selected for
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Vigor2920 Series User's Guide