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Installing Network Modules
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Installing Network Modules in Cisco 3800 Series Routers
OL-5973-01
The upper network module slot of the Cisco 3825 router, labeled 2 on the rear panel, can hold any of the
following sizes of network modules:
• One single-wide network module
• One extended single-wide network module
• One double-wide network module
• One extended double-wide network module
The Cisco 3845 router provides four slots for network modules, labeled 1, 2, 3, and 4 on the rear panel.
Each slot can hold either of the following sizes of network modules:
• One single-wide network module
• One extended single-wide network module
Slots 1 and 2 can also be combined to hold either of the following sizes of network modules:
• One double-wide network module
• One extended double-wide network module
Slots 3 and 4 can be combined in the same way to hold one double-wide or extended double-wide
network module.
Note The terms single-wide, extended single-wide, double-wide, and extended double-wide refer to the
physical size of a network module. Enhanced network modules offer additional functionality; this
functionality is not directly related to the module’s size.
Note The Cisco 3825 router supports one high-density analog-digital extension module for voice and fax. The
Cisco 3845 module supports two of these modules.
For detailed information about installing network modules in external router slots, see the following
documents:
• Cisco Network Modules Hardware Installation Guide
• Cisco 3800 Series Routers Cards and Modules
Some network module configurations require the installation or removal of a slot divider in the module
slot. See Figure 30.
Note Figure 30, Figure 31, and Figure 32 show a generic router. They do not represent the details of
Cisco 3800 series routers.