Chapter 1
Overview of Cisco 4000 Series ISRs
Figure 1-11
Bezel View of Cisco 4431 ISR with Two Power Supply Units
1
Power supply unit (PSU1)
3
On/Off switch
OL-32185-02
1
2
3
Hardware Installation Guide for the Cisco 4000 Series Integrated Services Router
4
2
LEDs
4
Optional power supply unit (PSU0)
Chassis Views
1-13