Oki OKIPAGE 10ex Maintenance Manual page 165

1.4 User Factory Set Operation
The desired destination can be set by turning the power on while depressing two keys
corresponding to the destination according to the following table.
This function shall not be open for users.
Destination Keys to be Depressed
ODA MENU
OEL MENU
INT A (A4) MENU, PAPER SIZE
(Australia, etc.)
INT L (Letter) MENU, TRAY TYPE
(Singapore, etc.)
D - 8