Cisco 2811 ROUTER 2FE 1NME 4HWIC 2PVDM 2AIM IP BASE WITH A/C POWER SUPPLY Specification Guide

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Installing Interface Cards in Cisco 2800 Series Routers
OL-5791-01
Installing Blank Panels over Empty Chassis Slots
Figure 6
Squeeze the Slot Divider to Release
Installing Blank Panels over Empty Chassis Slots
All empty chassis slots for WAN interface cards and voice interface cards must be covered with blank 
panels. Blank panels are required to ensure proper cooling airflow and to prevent electromagnetic 
interference. 
 shows a typical blank panel. 
Figure 7
Typical Blank Panel
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