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Cisco 2900 Series and 3900 Series Hardware Installation Guide
OL-18712-02
Chapter 1 Overview of the Routers
Chassis Views
Chassis Views
This section contains views of the front and back panels of the Cisco 2900 series and Cisco 3900 series
routers, showing locations of the power and signal interfaces, module slots, status indicators, and chassis
identification labels.
Note
Routers support the following slot types: Service Modules (SMs), Enhanced High-Speed Interface Card
(EHWICs), high-speed WAN interface cards (HWICs), voice WAN interface cards (VWICs), WAN
interface cards (WICs), Internal Services Modules (ISMs), and packet voice DSP modules (PVDM3s).
However, some router models do not support all of these media types. See the router model descriptions
for more information.
Cisco 2900 Series ISRs
•
Cisco 2901 Chassis, page 1-2
•
Cisco 2911 Chassis, page 1-4
•
Cisco 2921 and Cisco 2951 Chassis, page 1-6
Cisco 3900 Series ISRs
•
Cisco 3900 Series Chassis, page 1-8
Cisco 2901 Chassis
Figure 1-1— Front panel
Figure 1-2 on page 1-3— Back panel
Figure 1-3 on page 1-4— Back panel LEDs
Figure 1-1 Front Panel of the Cisco 2901 Router
1 SYS
1
1. System
2 ACT
2
2. Activity
3 POE
3
3. POE = power over Ethernet.
4 AC OK
4
(only on AC PS, not AC-POE PS)
4. LED goes off if the AC power fails or is disconnected. It does not go on and off with the power switch.
5 On/off switch 6 AC power connector
SYS ACT
POE
Cisco 2900 Series
4 5 6
250957
1 2 3
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