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
OL-5792-04
  Replacing the Power Supply
Figure 32
Inserting the ILP Supply into the Cisco 2801 Router
Step 6
Insert the screws that fasten the ILP supply to the chassis.
Step 7
Connect the main power supply cable to the main power supply connector, and connect the ILP supply 
cable to the ILP supply connector.
Step 8
Verify that the vent blocking plate has been removed in Step 4. The ILP fans should be visible through 
the vents that were blocked by the vent blocking plate.
Installing a Power Supply in a Cisco 2811 Router
Three types of power supplies are available for the Cisco 2811 router:
An AC-input power supply, driven by external AC power
A DC-input power supply, driven by external DC power
An inline power (ILP) supply, driven by external AC power. This supply provides power for the 
router and inline power for a complement of IP phones attached to the router.
The following sections describe how to install each type of power supply.
1
ILP supply fastening screws
3
ILP connector
2
ILP supply
4
Main power connector
103060
1
4
3
2