AIR-CT5520-50-K9 Cisco Wireless LAN Controller
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AIR-CT5520-50-K9 Cisco 5520 Wireless LAN Controller Refurbished

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Part Number#: AIR-CT5520-50-K9
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Short Description:
AIR-CT5520-50-K9 55520 Institute of Electrical and Electronics Engineers (IEEE) 802.11ac 10 Gigabits Wireless LAN Controller For Up To 50 Access Points | Made by Cisco | Refurbished
Product Condition:
Warranty provided by ALLHDD.COM:
90 Days

More Information for the Cisco AIR-CT5520-50-K9 Wireless Controller

In the dynamic landscape of wireless communication, the AIR-CT5520-50-K9 Cisco 10 Gigabits Wireless LAN Controller stands out as a robust and cutting-edge solution. This guide aims to provide a detailed exploration of this controller, shedding light on its features, functionalities, and the impact it can have on wireless networking environments. Let's embark on a journey to understand the intricacies of the AIR-CT5520-50-K9 and how it elevates the performance of wireless networks.

Understanding the Basics

Before delving into the technical aspects, it's crucial to grasp the fundamental role of a Wireless LAN (Local Area Network) Controller. Essentially, a wireless LAN controller is a device that manages multiple wireless access points, ensuring seamless communication between these access points and the connected devices.

The AIR-CT5520-50-K9, specifically, is part of Cisco's renowned lineup of wireless controllers. It is designed to provide high-performance wireless connectivity, supporting up to 10 Gigabits of data transfer. This capability is instrumental in meeting the ever-growing demands for bandwidth in modern wireless networks.

Key Features of AIR-CT5520-50-K9

  • High-Speed Data Transfer (10 Gigabits): The standout feature of the AIR-CT5520-50-K9 is its support for 10 Gigabits of data transfer. This high-speed capability ensures that the controller can handle large volumes of data traffic, making it suitable for environments with heavy network usage.
  • Scalability: In a world where the scale of wireless networks varies widely, scalability is a critical factor. The AIR-CT5520-50-K9 is designed to scale seamlessly, accommodating the growth of network infrastructure without compromising performance.
  • Centralized Management: The controller follows the traditional model of centralized management, allowing administrators to have a unified view and control over the entire wireless network. This centralized approach simplifies network administration and troubleshooting.
  • Advanced Security Features: Security is a top priority in any network infrastructure, and the AIR-CT5520-50-K9 doesn't disappoint. It comes equipped with advanced security features, including encryption protocols, authentication mechanisms, and intrusion detection, ensuring the integrity and confidentiality of data transmitted over the network.

Deployment Scenarios

To truly appreciate the value of the AIR-CT5520-50-K9, it's essential to understand the various deployment scenarios where this controller excels.

  • Enterprise Environments: Large enterprises with extensive wireless infrastructure requirements benefit greatly from the AIR-CT5520-50-K9. Its scalability and high-speed data transfer make it suitable for handling the diverse needs of a large workforce.
  • Educational Institutions: Schools, colleges, and universities often have sprawling campuses with a high density of wireless devices. The AIR-CT5520-50-K9's ability to manage large-scale deployments and its robust security features make it an ideal choice for educational institutions.
  • Healthcare Facilities: In healthcare settings, where reliable and fast communication is critical, the AIR-CT5520-50-K9 ensures that medical professionals can access vital information without any lag. Additionally, its security features play a crucial role in safeguarding sensitive patient data.
  • Public Venues: Public venues, such as stadiums, convention centers, and airports, experience peaks in wireless activity during events. The AIR-CT5520-50-K9's high-speed data transfer capability enables these venues to provide a seamless and high-quality wireless experience for attendees.

Configuration and Management

Configuring and managing the AIR-CT5520-50-K9 is a straightforward process, thanks to Cisco's user-friendly interface and comprehensive documentation. Here is an overview of the key steps involved:

  • Initial Setup: The initial setup involves connecting the controller to the network, configuring basic settings, and ensuring connectivity to the wireless access points. This is typically done through a web-based interface or a command-line interface.
  • Wireless Network Configuration: Administrators can define wireless networks, configure SSIDs (Service Set Identifiers), and set security parameters. This step involves creating a wireless environment that meets the specific needs of the organization.
  • User Authentication and Access Control: The AIR-CT5520-50-K9 supports various authentication methods, including WPA2 (Wi-Fi Protected Access 2) and 802.1X. Administrators can define access policies, control user authentication, and restrict access based on user roles.
  • Monitoring and Troubleshooting: Cisco provides robust monitoring tools that allow administrators to track the performance of the wireless network in real-time. Additionally, troubleshooting features help identify and resolve issues promptly.

Resiliency and High Availability

The AIR-CT5520-50-K9 Cisco 10 Gigabits Wireless LAN Controller is designed to provide resiliency and high availability for wireless networks. The controller can be configured in a redundant pair for active/standby failover, ensuring that there is no interruption in wireless service in the event of a failure. Additionally, the controller supports load balancing and automatic failover for multiple access points, providing a robust and reliable wireless network.

The controller also includes advanced security features, such as wireless intrusion prevention and rogue access point detection, to protect the network from potential threats. This, combined with the ability to easily monitor and manage the wireless network, ensures that the model is a reliable and secure solution for enterprise wireless networks.

Compliant Standards

The AIR-CT5520-50-K9 Cisco 10 Gigabits Wireless LAN Controller is a device that is designed to provide wireless network connectivity for businesses and organizations. It is compliant with many industry standards, including IEEE 802.11ac, which is the standard for wireless local area networks (WLANs). This standard provides high-speed wireless connectivity and supports a wide range of devices, including smartphones, tablets, laptops, and other wireless devices.

The product also meets other compliance standards, such as those related to security, power over Ethernet (PoE), and network management. For example, it is compliant with the Advanced Encryption Standard (AES), which is a widely used encryption standard for wireless networks, and it supports PoE, which allows the device to be powered through the network cable, eliminating the need for a separate power supply. Additionally, it is compliant with Cisco's Network Management System (NMS), which allows administrators to easily manage and monitor the wireless network.

General Information about this Cisco AIR-CT5520-50-K9

  • Manufacturer: Cisco
  • Part Number or SKU# AIR-CT5520-50-K9
  • Product Series: 5500
  • Product Type: Wireless LAN Controller

Technical Specifications

  • Wireless LAN Standard: IEEE 802.11ac
  • Wireless Transmission Speed: 10 Gbps
  • Interfaces/Ports of Wireless LAN Controller: Up to 50 Access Points
  • Ethernet Port: Yes
  • Fast Ethernet Port: Yes
  • Gigabit Ethernet Port: Yes
  • Number of Network (RJ-45) Ports: 2
  • PoE (RJ-45) Port: No
  • VGA: No
  • HDMI: No
  • USB: No
  • Powerline: No
  • Management Port: Yes

Environmental Conditions

  • Operating Temperature: 41°F to 104°F (5°C to 40°C), derate the maximum temperature by 1.0°C per every 1000 ft. (305m) of altitude above sea level
  • Nonoperating Temperature: -40°F to 149°F (-40°C to 65°C)
  • Humidity (Operating): 10% to 90%; non-condensing at 82°F (28°C)
  • Humidity (Nonoperating): 5% to 93% at 82°F (28°C)
  • Altitude (Operating): 0 to 3000m (0 to 10,000 ft.)
  • Altitude (Nonoperating): 0 to 12,192m (0 to 40,000 ft.)
  • Electrical Input:
    • AC Input Frequency Range: 47 to 63 Hz
    • Input Voltage Range:
      • Minimum: 90 VAC
      • Maximum: 264 VAC
    • Maximum Power: 190W
    • Input Kilovolt-Amperes (kVA):
      • Minimum: 0.090 kVA
      • Maximum: 0.700 kVA
    • Heat Dissipation: 650 BTU/hr
  • Sound Power Level (Operation): A-weighted per ISO 7779 LpAm (dBA) at 77°F (25°C): 49.3


  • Simple Network Management Protocol (SNMP) v1, v2c, v3
  • RFC 854 Telnet
  • RFC 1155 Management Information for TCP/IP-Based Internets
  • RFC 1156 MIB
  • RFC 1157 SNMP
  • RFC 1213 SNMP MIB II
  • RFC 1350 TFTP
  • RFC 1643 Ethernet MIB
  • RFC 2030 SNTP
  • RFC 2616 HTTP
  • RFC 2665 Ethernet-Like Interface Types MIB
  • RFC 2674 Definitions of Managed Objects for Bridges with Traffic Classes, Multicast Filtering, and Virtual Extensions
  • RFC 2819 RMON MIB
  • RFC 2863 Interfaces Group MIB
  • RFC 3164 Syslog
  • RFC 3414 User-Based Security Model (USM) for SNMPv3
  • RFC 3418 MIB for SNMP
  • RFC 3636 Definitions of Managed Objects for IEEE 802.3 MAUs
  • Cisco private MIBs

Power Description

  • Power Source: Power Supply
  • Compatibility: CE Markings per directives 2004/108/EC and 2006/95/EC
  • Safety Standards:
    • UL 60950-1 Second Edition
    • CAN/CSA-C22.2 No. 60950-1 Second Edition
    • EN 60950-1 Second Edition
    • IEC 60950-1 Second Edition
    • AS/NZS 60950-1
    • GB4943 2001
  • EMC - Emissions Standards:
    • 47CFR Part 15 (CFR 47) Class A
    • AS/NZS CISPR22 Class A
    • EN55022 Class A
    • ICES003 Class A
    • VCCI Class A
    • EN61000-3-2
    • EN61000-3-3
    • KN22 Class A
    • CNS13438 Class A
  • EMC - Immunity Standards:
    • EN55024
    • CISPR24
    • EN300386
    • KN24

In general, the AIR-CT5520-50-K9 Cisco 10 Gigabits Wireless LAN Controller emerges as a powerhouse in the realm of wireless networking. Its combination of high-speed data transfer, scalability, and advanced security features positions it as a go-to solution for a diverse range of environments.

Whether deployed in large enterprises, educational institutions, healthcare facilities, or public venues, the AIR-CT5520-50-K9 excels in providing a reliable and high-performance wireless experience. As technology continues to advance, the role of wireless controllers becomes increasingly critical, and the AIR-CT5520-50-K9 stands at the forefront, ready to meet the demands of the evolving wireless landscape.

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.

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