Using extensions to route callers with 4-digit extensions at your main menu.

To allow callers to reach users and groups by dialing an extension, your phone number must be routed to an auto attendant. At the main menu, callers will have the option to either dial their party’s 4-digit extension or select from the menu of options.

For more details on this topic, review Using an auto attendant to route callers with a menu of keypress options.