In the Details area for the Organization or User, click the Telephone Numbers tab.
The Telephone Numbers table, which can be empty, appears.
Click Add.
A Details Panel window opens.
Select a value from the Type combo box.
The following values are available:
Beeper
FAX
HomePhone
MobilePhone
OfficePhone
Type values in the fields. All fields are optional.
Country Code
Area Code
Phone Number
Extension
Click Add to save the new object and close the Details Panel window.
Click Apply in the Details area for the object.