Sharp FO-DC535 - Manual (Page 196)

Department Control
194
Accessing the machine
When Department Control is activated, you must enter your Department Code
before using the machine.
♦
If you do not begin the operation within one minute after entering the code,
the machine will return to controlled access mode.
Note: You do not need to enter a Department Code to receive faxes manually (by
picking up an extension phone connected to the same line and pressing on
the machine).
START/
ENTER