Allied Telesis AT-SBx81CFC960 - Manual (Page 135)

SwitchBlade x8106 Chassis Switch and AT-SBx81CFC960 Card Installation Guide
Section II: Installing the Chassis 135
Figure 75. Tightening the Thumb Screws on the AT-SBx81CFC960 Card
10. Tighten the screws with a #2 Phillips-head screwdriver to secure the
controller card to the chassis.
Allied Telesis recommends tightening the screws to 5 inch-lbs.
11. if the chassis is to have two AT-SBx81CFC960 Controller Fabric
Cards, repeat this procedure to install the second card.
12. Go to “Installing the Ethernet Line Cards” on page 136.