Not sure if this helps or not.
What Is - Smart dialing feature
The smart dialing feature on the handheld allows you to set a default Country Code and Area Code. To call a number with the default area code, you need to dial only seven digits, whether you are calling from within the area code or outside it. Smart dialing also allows you to store the number for a corporation. To reach an extension within that corporation, you need to dial only Alt + 8 (letter X) and the extension.
Configuring the Smart Dialing Feature on the Handheld
From the handheld Home screen, select Phone > Options > Smart Dialing and complete the fields described in the table.
Field Description Country Code The code for the country that you call most frequently.
Area Code The area code that you call most frequently.
National Number Length The number of digits in the telephone number including Area Code but excluding Country Code.
Corporate Phone Number The number of the corporation, which you call most frequently.
Wait For The length of the pause in seconds between connecting to the corporation and dialing the extension.
Extension Length The number of digits in the extensions at the corporation called most frequently.