Cisco 2811 - Voice Security Bundle Router Hardware Manual page 123

Installing and Removing Slot Dividers
Figure 2 Inserting a Slot Divider into an HWIC Slot on a Cisco 2801 Router
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Step 2 Tighten the retention screw on the slot divider.
Installing Slot Dividers in HWIC Slots on Cisco 2811, Cisco 2821, and Cisco 2851 Routers
Figure 3 shows a slot divider for HWIC slots on Cisco 2811, Cisco 2821, and Cisco 2851 routers.
Installing Interface Cards in Cisco 2800 Series Routers
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