Allied Telesis AT-SBx31CFC960 - Manual (Page 99)

SwitchBlade x3112 Chassis Switch and AT-SBx31CFC960 Card Installation Guide
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2. Lift the AT-SBx3112 Chassis into the equipment rack and set the
bottom of the equipment rack brackets firmly on the two equipment
rack screws you installed in “Preparing the Equipment Rack” on
page 91. Refer to Figure 39.
Figure 39. Lifting the AT-SBx3112 Chassis into the Equipment Rack
3. With the bottom of the rack mount ears resting on the two rack mount
screws, tilt the top of the chassis back until both rackmount brackets
are flush and parallel with the vertical rack rails.
4. Install six rack mount screws (not provided) to secure the chassis to
the equipment rack, as shown in Figure 40 on page 100.