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ISR4331/K9 Cisco 3 Ports Rack-Mountable Integrated Service Refurbished

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Part Number#: ISR4331/K9
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Short Description:
ISR4331/K9 3 Ports 6 Slots Rack-Mountable Wall Mountable Small Form-Factor Pluggable (SFP) Gigabit Ethernet 4331 Integrated Service Router (ISR) | Made by Cisco | Refurbished
Product Condition:
Warranty provided by ALLHDD.COM:
90 Days

Product Overview of the Cisco ISR4331/K9 Service Router

The Cisco ISR4331/K9 is a versatile integrated service router designed to meet the networking needs of businesses and organizations. This router is equipped with various features and capabilities that make it a reliable and efficient choice for a wide range of network applications.

Key Features

The Cisco ISR4331/K9 comes with several notable features that set it apart in the world of networking equipment:

  • Port and Slot Configuration: The ISR4331/K9 router offers 3 ports and 6 slots for various networking connections and expansion options. This flexibility is crucial for accommodating the needs of different network environments.
  • Rack-Mountable and Wall Mountable: The router is designed to be versatile and can be mounted in a standard rack or on a wall, allowing for flexibility in deployment.
  • Small Form-Factor Pluggable (SFP) Support: SFP slots provide compatibility with a wide range of SFP modules, allowing for various connectivity options, including Gigabit Ethernet.
  • Gigabit Ethernet Connectivity: The router features Gigabit Ethernet capabilities, which ensure high-speed data transfer and network performance, making it suitable for demanding applications.
  • Integrated Service Router (ISR): Being part of the Integrated Service Router family from Cisco, the ISR4331/K9 is designed to offer a wide range of services and applications, making it a comprehensive networking solution.

Port and Slot Configuration

The Cisco ISR4331/K9 comes equipped with 3 ports and 6 slots, which can be used for a variety of networking purposes. These ports and slots are a fundamental part of the router's functionality.

  • Ports: The 3 ports on this router allow you to connect to different network devices and services. This includes devices such as computers, printers, switches, and other routers. The port options provide the flexibility to establish the required connections for your network.
  • Slots: The 6 slots offer expansion capabilities. You can add various interface cards and modules to these slots to extend the router's functionality. This makes the ISR4331/K9 adaptable to different networking scenarios.

Rack-mountable and wall-mountable

The Cisco ISR4331/K9 is designed to be versatile in its deployment. It can be mounted in a standard equipment rack or on a wall. This adaptability ensures that the router can fit into different physical environments, making it suitable for businesses with varying space constraints.

  • Rack-Mountable: When mounted in a rack, the router can be easily integrated into existing networking infrastructure. This is especially useful in data centers and network closets where space optimization is crucial.
  • Wall Mountable: For smaller businesses or locations where rack space is limited, wall mounting the router is an efficient solution. This way, the router can be positioned conveniently, even in smaller offices or remote sites.

Small Form-Factor Pluggable (SFP) Support

One of the standout features of the ISR4331/K9 is its support for Small Form-Factor Pluggable (SFP) modules. SFPs are compact, hot-pluggable transceivers that allow for flexible connectivity options. With SFP support, you can choose the appropriate SFP module based on your specific networking needs.

  • Versatile Connectivity: SFP modules come in various types, including those for Gigabit Ethernet, Fast Ethernet, and fiber-optic connections. This versatility ensures that the router can be used in a wide range of networking scenarios.
  • Hot-Swappable: SFP modules are hot-swappable, which means they can be replaced or installed without shutting down the router or causing network interruptions. This feature is valuable for businesses that require high availability.

Gigabit Ethernet Connectivity

The Cisco ISR4331/K9 router boasts Gigabit Ethernet capabilities. Gigabit Ethernet is a standard for high-speed wired network connections. With Gigabit Ethernet support, the router can handle large volumes of data and provide fast and reliable network performance.

  • High-Speed Data Transfer: Gigabit Ethernet allows for data transfer rates of up to 1 gigabit per second (Gbps). This is significantly faster than traditional Ethernet connections, making it suitable for bandwidth-intensive applications.
  • Business-Grade Performance: Businesses that rely on video conferencing, large file transfers, and other data-intensive tasks will benefit from the Gigabit Ethernet capabilities of the ISR4331/K9.

Integrated Service Router (ISR)

As a member of the Integrated Service Router (ISR) family from Cisco, the ISR4331/K9 is designed to offer a wide range of services and applications within a single networking device.

  • Comprehensive Solution: The ISR4331/K9 is more than just a router. It can function as a firewall, VPN concentrator, application accelerator, and more. This integration of services reduces the need for multiple devices in your network infrastructure.
  • Simplified Management: Managing a single integrated device is often more straightforward than dealing with multiple separate components. This can lead to operational efficiency and cost savings.
  • Scalability: The ISR4331/K9's modular design allows for easy scalability. As your business grows and your network requirements change, you can add modules and cards to adapt the router to your evolving needs.

Performance of Router

  • The performance of a Cisco 3-port router will depend on a variety of factors, including the specific model of the router, the type of network it is being used in, and the workload it is handling.
  • In general, Cisco 3-port routers are designed to provide fast and reliable connectivity for a variety of networking applications. They are capable of handling high-speed data transfer rates and are suitable for use in both small and large networks.
  • Cisco 3-port routers also typically offer a range of features that can help to improve performance, such as Quality of Service (QoS) controls that allow you to prioritize different types of traffic, and support for advanced networking protocols such as IPv6.
  • To get the best performance from a Cisco 3-port router, it is important to ensure that it is properly configured and that it is being used in an appropriate network environment. Regular maintenance and updates can also help to ensure that the router is operating at its

More Specifications

  • A Cisco Gigabit Ethernet router is a networking device that is capable of supporting data transfer rates of up to 1 Gigabit per second (Gbps). It is designed to connect multiple devices or networks and is capable of handling high volumes of traffic, making it suitable for use in a variety of networking environments.
  • Cisco offers a range of Gigabit Ethernet routers that are suitable for different types of networks and applications. For example, the Cisco 1800 Series Integrated Services Router is a compact, all-in-one device that is designed for small businesses and branch offices. It combines routing, security, and wireless capabilities in a single device, making it an ideal choice for small networks.
  • Other Cisco Gigabit Ethernet routers, such as the Cisco ASR 1000 Series Aggregation Services Router, are designed for use in larger networks and offer more advanced features such as support for multiple WAN connections, VPN (Virtual Private Network) capabilities, and hardware acceleration.
  • In general, Cisco Gigabit Ethernet routers are reliable, easy to configure, and offer a range of features that make them suitable for use in a variety of networking environments.

Deployment and Configuration

  • The Cisco ISR4331/K9 is a rack-mountable integrated service router that provides three ports for connecting to various network devices. To deploy the router, you would first need to physically install it in a rack and connect it to your network. This can be done by connecting the router's WAN port(s) to a modem or other network connection and connecting the LAN ports to your network devices such as computers and servers.
  • Once the router is physically connected, you can then access the router's web-based configuration interface to set it up. This can be done by entering the router's IP address in a web browser and logging in with the default username and password.
  • In the configuration interface, you can configure various settings such as the router's IP address, DNS settings, and security settings. You can also set up virtual private networks (VPNs) and configure Quality of Service (QoS) settings to prioritize certain types of network traffic.

General Information about this Cisco ISR4331/K9

  • Manufacturer: Cisco
  • Part Number or SKU# ISR4331/K9
  • Product Type: 3 Ports Router
  • Product Name: Rack-Mountable

Interfaces/Ports for Integrated Service Router

  • Total Number of Ports: 3
  • USB: Yes
  • Powerline: No
  • Management Port: Yes
  • Number of Network (RJ-45) Ports: 2

I/O Expansions of 3 Ports Router

  • Number of Total Expansion Slots 6
  • Expansion Slot Type SFP
  • Expansion Slot Type Network Interface Module (NIM)
  • Expansion Slot Type Integrated Services Card (ISC)
  • Network / Transport Protocol: IPSec, PPPoE, DHCP
  • Remote Management Protocol: SNMP, Ramon
  • Compliant Standards : Ieee 802.3, Ieee 802.1q, Ieee 802.3ah, Ieee 802.1ag, Ansi T1.101, Itu-t G.823, Itu-t G.824

Network & Communication

  • Ethernet Technology: Gigabit Ethernet
  • Network Technology: 10/100/1000Base-T

Management & Protocols

  • Security Features-
  • IPsec
  • VPN
  • Secure Socket Layer (SSL)


  • Standard Memory 4 GB
  • Maximum Memory 16 GB
  • Memory Technology DDR3 SDRAM
  • Flash Memory 4 GB

Power Description

  • PoE (RJ-45) Port No
  • Input Voltage 230 V AC
  • Input Voltage 120 V AC
  • Power Source Power Supply

In Summary, the Cisco ISR4331/K9 is a versatile and powerful networking device that can enhance the connectivity and security of your network infrastructure. With its scalability, versatility, and reliability, it is a valuable addition to businesses of all sizes and various networking scenarios. Whether you need to connect branch offices, support data center operations, or provide services to customers, the Cisco ISR4331/K9 is up to the task. By following the installation and configuration steps, you can harness the full potential of this router and enjoy efficient and secure networking. the Cisco ISR4331/K9 is a reliable choice for businesses and organizations looking to improve their network infrastructure. Its hardware specifications, use cases, benefits, and installation guidelines make it a valuable asset for various networking scenarios. If you need a network device that combines scalability, versatility, and security, the Cisco ISR4331/K9 is an excellent choice to consider.

Product Condition:
Warranty provided by ALLHDD.COM:
90 Days

About Refurbished Products

Refurbished products are typically refurbished by an Original Manufacturer or an affiliate of the manufacturer or 3rd party facility. This product may have minor blemishes due to normal product usage and doesn't necessarily come with documentation and software unless indicated, but has been well tested and generally has never had any defects.

Here, you can check more available conditions of your desired product ISR4331/K9 at a competitive price. We are trying our best to meet your needs on the enterprise-level computer, server, data centre, and networking hardware. You are welcome to ask our live chat or get live representative support over the phone.


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Replacement or refund. In the case of material defects, we will try to replace the product first. The product will be replaced before the expiration of the original warranty. For any failure of hardware, if we cannot process the replacement of the product(s)/model(s), we will refund the original selling/invoiced price. The shipping costs and sales tax, if any, are non-refundable. ALLHDD retains the right to decide whether the item(s) will process for replacement or refund.

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