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Installing and Upgrading Internal Modules in Cisco 2800 Series Routers
OL-5792-04
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 Figure 9, Figure 10, and
Figure 11 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 Figure 8, Figure 9, Figure 10, or Figure 11,
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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