Removing and Replacing a Card Cage Assembly
Step 4 Grasp the two line card ejector levers and pivot them away from the card until they are perpendicular to the line card faceplate to completely seat the card in the backplane connector.
Step 5 Tighten the two captive screws at the top and bottom of the line card.
Repeat Step 2 through Step 5 for the rest of the line cards.
Step 6 Proceeding from left to right in the upper card cage, check your list of interface cable connections and identify the interface cables that attach to the first line card.
Step 7 One interface cable at a time, carefully route the identified interface cable through the horizontal cable tray and down to the line card interface port.
Note On line cards with multiple ports, route and connect the interface cables to the line cards starting at the bottom port and working up.
Cisco 12012 Gigabit Switch Router Card Cage Assembly Replacement Instructions 25