After you select a country or region and, if necessary, state or province, telephone numbers are displayed in the Predefined Numbers list. Select at least one of these numbers to add to the Configured Numbers list on the left.
After you select a number, you can add it to the Configured Numbers list on the left as it is or you can customize it (for example, by removing the area code if the Hardware Management Console is dialing within the same area code). To add the number you selected to the Configured Numbers list without changing it, click Add Selected. Alternately, to customize the number you selected, click Add Custom. This takes you to another window, from which you can customize the number to dial.