Cisco ISR 4331 Ethernet LAN Black wired router

300 Mbps, 3x GE, 2x NIM, 1x ISC, 1x SM, 4x GB Flash Memory, 4x GB DRAM, 1RU, 250W
Cisco 4000 Family Integrated Services Routers (ISRs) form an intelligent WAN platform that delivers the performance, security, and convergence capabilities that today’s branch offices need

The Cisco 4000 Family Integrated Services Router (ISR) revolutionizes WAN communications in the enterprise branch. With new levels of built-in intelligent network capabilities and convergence, it specifically addresses the growing need for application-aware networking in distributed enterprise sites. These locations tend to have lean IT resources. But they often also have a growing need for direct communication with both private data centers and public clouds across diverse links, including Multiprotocol Label Switching (MPLS) VPNs and the Internet.

The Cisco 4000 Family contains five platforms: the 4451-X, 4431, 4351, 4331, and 4321 ISRs.

Cisco 4000 Family ISRs provide you with Cisco® Intelligent WAN (IWAN) software features and a converged branch infrastructure. Along with superior throughput, these capabilities form the building blocks of next-generation branch-office WAN solutions.

Cisco Intelligent WAN (IWAN)
Cisco IWAN is a set of intelligent software services that allow you to reliably and securely connect users, devices, and branch office locations across a diverse set of WAN transport links. IWAN-enabled routers like the ISR 4000 dynamically route traffic across the “best” link based on up-to-the-minute application and network conditions for great application experiences. You get tight control over application performance, bandwidth usage, data privacy, and availability of your WAN links - control that you need as your branches conduct greater volumes of mission-critical business.

Cisco Converged Branch Infrastructure
The Cisco 4000 Series ISRs consolidate many must-have IT functions, including network, compute, and storage resources. The high-performance, integrated routers run multiple concurrent IWAN services, including encryption, traffic management, and WAN optimization, without slowing your data throughput. And you can activate new services on demand through a simple licensing change.

MNF# ISR4331-AX/K9
EAN 0882658767128
Manufacturer Cisco

Ethernet LAN features

Ethernet LAN
Ethernet LAN data rates 10,100,1000 Mbit/s
Cabling technology 10/100/1000Base-T(X)
Full duplex

Wireless LAN features


Ports & interfaces

WAN connection Ethernet (RJ-45)
Ethernet LAN (RJ-45) ports 5
USB ports quantity 2
USB version 2.0
RS-232 ports 2
DC-in jack

DSL features

xDSL connection type

Mobile networking

Data network Not supported


Networking standards IEEE 802.1ag,IEEE 802.1Q,IEEE 802.3,IEEE 802.3ah


Routing protocols BGP,EIGRP,IS-IS,OSPF

Management features

Web-based management
Quality of Service (QoS) support
Reset button


Firewall security Firewall, IPSec VPN, EZVPN, DMVPN, FlexVPN


Color of product Black
Rack mounting
Form factor 1U
LED indicators
On/off switch


Flash memory 4000 MB
Internal memory 4000 MB
Maximum memory card size 16 GB


Power consumption (typical) 42 W
Power source type AC, DC
AC input voltage 100-240
AC input frequency 47/63
Power supply 250 W
Input current 3

Weight & dimensions

Weight 11 lbs (5 kg)
Width 17.2" (438.1 mm)
Depth 17.2" (438.1 mm)
Height 1.75" (44.5 mm)
Package width 22.7" (577.9 mm)
Package depth 22.5" (571.5 mm)
Package height 7.13" (181 mm)

Operational conditions

Operating temperature (T-T) 0 - 40 °C
Storage temperature (T-T) -25 - 70 °C
Operating relative humidity (H-H) 5 - 90%
Storage relative humidity (H-H) 5 - 95%
Operating altitude 0 - 187007.9" (0 - 4750 m)


Safety UL 60950-1, CAN/CSA C22.2 No. 60950-1, EN 60950-1, AS/NZS 60950-1, IEC 60950-1, GB-4943
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