This object specifies the minimum and the maximum values that can be specified for Area Code.
On SBC main screen, go to Configuration > Profile Management > Category: Digit Parameter Handling Profiles > Numbering Plan > Lengths > Area Code.
Select the desired Numbering Plan from the drop-down list to view its respective Area Code parameters.
The Area Code window is displayed.
The following fields are displayed:
Make the required changes and click Save at the right hand bottom of the panel to save the changes made.