Phone-> Dial Plan->Replace Rule - Denwa Communications DW-V-AXT-ANDROID User Manual

5.Phone-> Dial Plan->Replace Rule
Go to the path: Web UI-> Phone-> Dial Plan
Sections
Rules
Rules Modify
Area Code
Description
Allow user to select Replace rule or Dial-now to display or
edit.
Allow user to modify selected rules information, for replace
rule, you can modify related accounts, prefix and replace.
Area codes are also known as NPAs (Numbering Plan Areas).
They usually indicate different geographical areas within one
country. If entered numbers match the predefined area
code rule, the IP phone will automatically prefix outgoing
number with area code.
Note: There is only one area code rule supported.