First Alert ACTION T-1000 - Manual (Page 58)

DIP Switch Settings
The printer has twelve DIP switches which allow you to change many of
the printer’s settings to suit your individual needs. The DIP switches are
in two groups, mounted on the back panel, as shown below.
DIP switch l-1 is the switch at the far left side, and the one at the far
right is DIP switch
2-4.
You can easily reset the switches with a thin,
pointed object such as a small screwdriver or the cap of a ballpoint pen.
Note: When you change a DIP switch setting, turn off the power, reset
the switch or switches, then turn on the power again. The printer
checks and recognizes new settings only at the time the power is
turned on.
Defaults and DIP Switches 5-3