
1-38
Hardware Installation Guide for the Cisco 4000 Series Integrated Services Router
OL-32185-02
Chapter 1 Overview of Cisco 4000 Series ISRs
Slots, Subslots (Bay), Ports, and Interfaces in Cisco 4000 Series ISRs
Figure 1-28
Cisco 4321 ISR Airflow
Figure 1-29
Cisco 4221 ISR Airflow
Slots, Subslots (Bay), Ports, and Interfaces in Cisco 4000
Series ISRs
The routers supports two types of interface modules: Enhanced Service Modules (SM-X) and Network
Modules (NIMs).
1
Exhaust
2
Intake
391895
1
2
385359