Before you begin
A common task for system administrators is to configure their system to recognize new area codes or prefixes.
When you want to add a new area code or prefix, you look up the settings for the old area code or prefix and enter the same information for the new one.
Tip:
Use display toll xxx, where xxx is the prefix you want to add, to see if the new area code or prefix number is set up as a toll call (y) or not. Some users might be disallowed to dial toll call numbers.