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Hardware Installation Guide for the Cisco 4000 Series  Integrated Services Router
OL-32185-02
Chapter 1      Overview of Cisco 4000 Series ISRs
  Chassis Views
Hardware and Module Configuration
Table 1-1 shows key hardware and module configurations in Cisco 4000 Series ISRs.
Table 1-1 Hardware Features and Module Configuration in Cisco 4000 Series ISRs
1 Fan 2 CPU
3 Battery  4 GE 0/0/0/0 RJ-45 (copper cable) port
5 NIM slots
Interface
Cisco 4451-X 
ISR Cisco 4431 ISR Cisco 4351 ISR
Cisco 4331 
ISR Cisco 4321 ISR
Cisco 4221 
ISR
DRAM
3 DIMMs 
2 GB for each 
slot
3 DIMMs
2 GB for each 
slot
2 DIMMs
2 GB for each 
slot
2 DIMMs
2 GB for each 
slot
1 DIMM (4 GB 
DIMM 
supported)
1
4 GB on board 
memory
1. By default, there is no DIMM installed. DIMM is optional.
4 Gb on board 
memory
NIMs
3 single-wide or 
1 double-wide + 
1 single-wide
3 single-wide or 
1 double-wide 
+ 1 single-wide
3 single-wide or 
1 double-wide + 
1 single-wide
2 single-wide 
or 1 
double-wide
2 single-wide or 
1 double-wide
2 single-wide 
NIM slots or 1 
double-wide
SM-X
2 single-wide or
1 double-wide
NA 2 single-wide or
1 double-wide
1 single-wide NA NA
SSD or HDD 
NIM
1 single-wide 1 single-wide 1 single-wide 1 single-wide 1 single-wide 1 single-wide
Internal mSATA 
Interface
NA NA 1 mSATA slot 1 mSATA slot 1 mSATA slot NA
Front Panel PoE
2 PoE ports 2 PoE ports 2 PoE ports NA NA NA
Front Panel GE
4 ports 4 ports 3 ports 3 ports 2 ports 2 ports
ISC Slot
All ISC card 
types
All ISC card 
types
All ISC card 
types
All ISC card 
types
All ISC card 
types
NA
USB Type A 
Ports
2 USB Type A 2 USB Type A 2 USB Type A 1 USB Type A 1 USB Type A 1 USB Type A