Allied Telesis AT-SBx81CFC960 - Manual (Page 138)

Chapter 7: Installing the AT-SBx81CFC960 Control Card and Ethernet Line Cards
138 Section II: Installing the Chassis
8. Tighten the two screws with a # 2 Phillips-head screwdriver to secure
the line card to the chassis.
Allied Telesis recommends tightening the screws to 5 inch-lbs.
9. Repeat this procedure to install the remaining Ethernet line cards.
10. After installing the line cards. go to “Installing the Blank Slot Covers”
on page 139.