Setting the Outside Dialing Prefix

Depending on the printer model you are using, this function may not be supported or the functions you can use may vary.
Select the device you are using from [Printer].
To display all options:
In Mac OS X 10.7 or later, click [Show Details] at the bottom of the screen.
Select [Special Features] or [Advanced Settings] from the pop-up menu.
If you are setting the outside dialing prefix from the [Advanced Settings] preferences pane, click the [Line] tab.
Enter the outside dialing prefix.
From the [Special Features] preferences pane:
Select [Outside Dialing Prefix]/[Add Outside Dialing Prefix to G3/G4/IP Fax Number] → click [Settings] → enter the outside dialing prefix according to the communication mode.
From the [Advanced Settings] preferences pane:
Select [Specify Outside Dialing Prefix] → enter the number in [Outside Dialing Prefix].
Click [Print].