Cisco 4331 ISR User Manual

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Hardware Installation Guide for Cisco 4000 Series Integrated Services Routers
OL-32185-02
Chapter 6 Install and Upgrade Internal Modules and FRUs
Install and Remove DDR DIMMs on Cisco 4400 or 4300 Series ISRs
DIMMs have a polarization notch on the mating edge to prevent incorrect insertion. Figure 6-19 shows
the polarization notch on a DIMM.
Figure 6-19 DIMM Showing Polarization Notch
Remove DIMM
To remove a DIMM:
Step 1 Read the “Safety Warnings” section on page 6-2 section and disconnect the power supply before you
replace any module.
Step 2 Remove the chassis cover. See the “Remove and Replace the Chassis Cover” section on page 6-4.
Step 3 Locate the DIMM module. See the “Locate Internal and External Slots for Modules on Cisco 4451 ISR”
section on page 6-7 to find the DIMM sockets on the router.
1 Polarization notch
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Cisco 4331 ISR Specifications

General

Brand	Cisco
Model	4331 ISR
Category	Network Router
Language	English