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by Cisco
Product Line: Cisco 3900 Series
Product Type: Integrated Services Router
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Title: Surplus

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Product Description

The C3945-AX/K9 CISCO integrates 3 Gigabit Ethernet ports and supports VoIP, tailored for versatile networking needs. It offers extensive expansion capabilities, including 15 expansion slots accommodating EHWIC, PVDM, SFP (mini-GBIC), and ISM modules, alongside 4 onboard DSP (PVDM) slots and 2 SFP-based ports. Designed for adaptability, it features a 1 GB standard memory, 2 external USB 2.0 slots, and can be deployed in rack-mounted, desktop, or wall-mounted configurations, making it suitable for various operational environments.

FAQs for the C3945-AX/K9

  • What is the maximum number of expansion slots available on this networking hardware?
    The device supports up to 15 expansion slots.
  • How does the device support VoIP capabilities?
    Yes, VoIP is supported, enhancing telecommunication functionalities.
  • Can you describe the Ethernet technology supported by this device?
    It utilizes Gigabit Ethernet technology for networking.
  • What are the dimensions of this networking device?
    The dimensions are 5.3 inches in height, 18.8 inches in width, and 17.3 inches in depth.
  • What types of expansion slots does this device include?
    It includes EHWIC, PVDM, SFP (mini-GBIC), and ISM slots.
  • Is a management port available on this device?
    Yes, a management port is included for administrative purposes.
  • How many network (RJ-45) ports are available?
    There are 3 network (RJ-45) ports.
  • What form factors is this device compatible with?
    It is compatible with rack mountable, desktop, and wall mountable form factors.
  • What is the standard memory capacity of this device?
    The device comes with 1 GB of standard memory.
  • How many total onboard WAN or LAN 10/100/1000 ports does the device have?
    There are 3 total onboard WAN or LAN 10/100/1000 ports.

Product Review

The CISCO C3945-AX/K9 offers flexible connectivity options with its three Gigabit Ethernet ports, two SFP-based ports, and comprehensive expansion capabilities through its 15 slots, supporting EHWIC, PVDM, SFP, and ISM modules. However, with only three onboard 10/100/1000 Ethernet ports, network engineers might find the initial port availability limiting for high-density environments without additional expansion modules. Its support for VoIP and multiple form factors (rack mountable, desktop, wall mountable) make it versatile for various deployment scenarios, though its considerable weight of 39 lbs could pose challenges for some installations.


The Cisco C3945-AX/K9 integrates key networking and communication technologies into a single, comprehensive system. Designed for scalability, it supports a wide array of business needs with its versatile hardware specifications. The product is engineered for deployment in various environments, including rack-mounted, desktop, or wall-mounted setups, making it adaptable to different spatial requirements. At the core of its design, the device features three Gigabit Ethernet ports, facilitating high-speed network connections and efficient data transfer rates. This capability ensures that the C3945-AX/K9 can handle demanding network tasks, making it suitable for businesses seeking to maintain robust communication channels. The inclusion of Gigabit Ethernet technology underscores the device's suitability for environments where network performance is critical. Expansion is a significant aspect of the C3945-AX/K9, with fifteen expansion slots available. These slots support a variety of expansion modules, including EHWIC, PVDM, SFP (mini-GBIC), and ISM. This flexibility allows for customization and scalability, ensuring that the router can adapt to evolving network requirements. The expansion options provide the means to enhance the router's functionality over time, catering to growing business needs. - EHWIC slots: 4 - SFP-based ports: 2 - Onboard DSP (PVDM) slots: 4 The device's standard memory of 1 GB supports its operations and performance capabilities. This memory allocation is sufficient for handling the device's processing needs, ensuring efficient execution of tasks and services. Furthermore, the router's form factor, which allows for rack, desktop, and wall mounting, offers versatility in deployment, ensuring it can be integrated into a variety of settings without requiring significant spatial adjustments. With dimensions of 5.3 inches in height, 18.8 inches in width, and 17.3 inches in depth, and a weight of 39 lbs, the C3945-AX/K9 is designed to fit into standard networking racks while also being compact enough for desktop or wall mount setups. This design consideration ensures that the device can be accommodated in different physical environments, from data centers to office spaces. VoIP support is another critical feature of the C3945-AX/K9, highlighting its capacity to manage voice communications alongside data networking. This dual functionality makes the device an all-in-one solution for businesses looking to streamline their communication infrastructure. The inclusion of VoIP support emphasizes the device's role in modern communication networks, where voice and data convergence is increasingly prevalent. The management port and external USB 2.0 slots (Type A) further enhance the device's usability and management. These features facilitate easy configuration and maintenance, allowing for direct management access and external storage connectivity for software upgrades or configurations. In summary, the Cisco C3945-AX/K9 is a versatile and scalable networking device that integrates essential networking and communication features. Its design accommodates a range of deployment scenarios, and its expansion capabilities ensure it can evolve in line with business growth. With support for high-speed Ethernet and VoIP, alongside a variety of management and connectivity options, the C3945-AX/K9 stands out as a comprehensive solution for modern networking needs.


Model NumberC3945-AX/K9
Ports Quantity3
Slots for Expansion15
Network InterfaceGigabit Ethernet
Types of Expansion SlotsEHWIC, PVDM, SFP (mini-GBIC), ISM
Supported Network Protocols10/100/1000Base-T
Unit Size in Rack3U
RJ-45 Network Ports Count3
Has Management PortYes
Memory Capacity1 GB
Installation OptionsRack Mountable, Desktop, Wall Mountable
Device Height5.3 in.
Device Width18.8 in.
Device Depth17.3 in.
Device Weight39 lbs
Support for VoIPYes
Rack Mounting KitIncluded
Built-in WAN or LAN Ports3
DSP Slots Available4
USB 2.0 Ports (Type A)2
Available EHWIC Slots4
Number of SFP Ports2

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