Allied Telesis AT-SBx81CFC960 - Manual (Page 138)

Chapter 7: Installing the AT-SBx81CFC960 Controller and Ethernet Line Cards
138 Section II: Installing the Chassis
5. Slowly and carefully slide the card into the slot.
Caution
Keep the card level with the chassis as you slide it into the slot. You
might damage the components on the top or bottom of the card if
you slide it in at an angle. Refer to Figure 67 on page 129.
Caution
Do not force the card into the slot. If you feel resistance, remove the
card and try again. Be sure that the edges of the card are properly
aligned with the card guides.
6. When you feel the line card make contact with the connector on the
backplane of the chassis, gently press on both sides of the faceplate to
seat the card on the connector. Refer to Figure 79.
Figure 79. Seating an Ethernet Line Card on the Backplane Connector
7. Finger tighten the two thumbscrews on each side of the line card to
secure it to the chassis, as shown in Figure 80 on page 139.