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

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Installing and Upgrading Internal Modules in Cisco 2800 Series Routers
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  Installing the Chassis Cover
Installing the Cover on Cisco 2821 and Cisco 2851 Routers
To install the chassis cover on a Cisco 2821 or a Cisco 2851 router, follow these steps. A number 2 
Phillips screw driver is required.
Step 1
Place the chassis on a flat surface.
Step 2
Hold the cover at a 45-degree angle, and insert the tabs into the slots along the front (bezel) edge of the 
chassis. See 
Step 3
Center the cover over the chassis and lower it onto the chassis.
Step 4
Install the three cover screws.
Figure 52
Installing Cover on Cisco 2821 and Cisco 2851 Routers
1
Insert tabs and center the cover 
2
Close the cover
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