Cisco 3900 series User Manual

5-7
Cisco 2900 Series and 3900 Series Hardware Installation Guide
OL-18712-03
Chapter 5 Installing and Upgrading Internal Modules and FRUs
Locating Internal Modules
Step 4 Install or replace DRAM DIMMs, ISMs, or PVDMs. See the “Locating Internal Modules” section on
page 5-7 to locate the slots on the router.
or
Install or replace the Services Performance Engine. Check that the ejector levers on the replacement SPE
are fully open outward. Carefully slide the SPE into the router tray until the connector is engaged, and
then close the ejector levers to fully seat the SPE.
Step 5 Tighten the two captive retention screws on each side of the motherboard.
Locating Internal Modules
The following illustrations show the locations of internal modules on the router motherboard. Internal
modules include DIMMs, Internal Services Modules (ISMs), next-generation Packet Voice Data
Modules (PVDM3s), and power supply on Cisco 2900 series ISR.
• Cisco 2901—Figure 5-3
• Cisco 2911—Figure 5-4
• Cisco 2921 and Cisco 2951—Figure 5-5
• Cisco 3925 and Cisco 3945—Figure 5-6
• Cisco 3925E and Cisco 3945E—Figure 5-7

Cisco 3900 series Specifications

General

Brand	Cisco
Model	3900 series
Category	Network Router
Language	English