Draytek Vigor2110 Series User Manual page 59

OP Number
Min Len
Max Len
Interface
C a l l B a r r i n g
C a l l B a r r i n g
Call barring is used to block phone calls coming from the one that is not welcomed.
Click any index number to display the dial plan setup page.
will be changed to "88631111111" and sent to SIP server.
The front number you type here is the first part of the account
number that you want to execute special function (according to
the chosen mode) by using the prefix number.
Set the minimal length of the dial number for applying the
prefix number settings. Take the above picture (Prefix Table
Setup web page) as an example, if the dial number is between 7
and 9, that number can apply the prefix number settings here.
Set the maximum length of the dial number for applying the
prefix number settings.
Choose the one that you want to enable the prefix number
settings from the saved SIP accounts. Please set up one SIP
account first to make this interface available.
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Vigor2110 Series User's Guide