AT&T 959 User Manual page 45

Set Home Area Code
You must program your area code, so your phone can properly recognize
and dial calls.
IF FOR CALLS WITHIN YOUR AREA CODE
YOU DIAL:
7 digits
(phone number, no area code)
10 digits
(area code + phone number)
—OR—
11 digits (1 + area code +
phone number
w
ENTER IN STEP 2:
Your area code
0 0 0
Press O until the screen displays:
1
2 Use the keypad to enter the three digits of your
Home Area Code.
Press O to save the setting. You will see the
3
Local Area Code setup screen.
HAC-___
HOME AREA CODE?
5