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

Installing and Upgrading Internal Modules in Cisco 2800 Series Routers

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Installing and Removing DRAM DIMMs

Caution

Handle DRAM DIMMs by the edges only. DIMMs are ESD-sensitive components and can be damaged
by mishandling.

DRAM DIMM Location and Orientation

On Cisco 2801 routers, the single DRAM DIMM connector is located on the system board. Refer to

Figure 8

for the location of the DIMM connector.

On Cisco 2811, Cisco 2821, and Cisco 2851 routers, the two DRAM DIMM connectors are located on
the system board, and are identified as DIMM 0 and DIMM 1. Refer to

for the location of the DIMM connectors.

DRAM DIMMs have a polarization notch on the mating edge to prevent incorrect insertion.

Figure 12

shows the polarization notch on a DRAM DIMM.

Figure 12

DRAM DIMM Showing Polarization Notch

Removing a DRAM DIMM

To remove a DRAM DIMM from the system board, follow these steps:

Step 1

Locate the DRAM DIMM on the system board. See

depending on your router model, for the location of the DIMM connectors.

Step 2

Pull the latches away from the DRAM DIMM at both ends; this lifts the DIMM slightly. Then lift the
DIMM out of the connector. See

Figure 13

Polarization notch

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