Allied Telesis CentreCOM FS980M Series Quick Installation Manual page 16

5. Turn over the switch.
Note: If the wall material requires pre-drilled holes, perform steps 6
to 10. Otherwise, go to step 11.
6. Have another person hold the switch at the selected wall location,
while you use a pencil to mark the wall with the locations of the
four holes in the brackets.
7. Place the switch on a table.
8. Use the stud finder to check for hot electrical wires at the
locations of the screw holes.
Warning: Do not install the switch on a wall near hot
electrical wires.
16 CentreCOM FS980M Series Quick Installation Guide