Cisco SG500-52P-K9-NA 52 Ports Switch
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Cisco SG500-52P-K9-NA 52 Ports Manageable Switch RJ-45 PoE Refurbished

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Part Number#: SG500-52P-K9-NA
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Short Description:
SG500-52P-K9-NA Small Business SG500-52P Managed Ports Switch 48 Power Over Ethernet (PoE) Ethernet Ports & 2 Combo Gigabit Small Form-Factor Pluggable (SFP) Ports & 2 Small Form-Factor Pluggable (SFP) Ports | Made by Cisco | Refurbished
Product Condition:
Warranty provided by ALLHDD.COM:
90 Days

Product Overview of the Small Business 52 Ports Switch

In the fast-paced world of networking, businesses of all sizes require reliable and efficient solutions to manage their data traffic. One such solution is the Cisco SG500-52P-K9-NA Small Business 52-Ports Layer 2 Ethernet Switch. This article aims to provide a detailed yet accessible understanding of this networking device, explaining its key features, benefits, and how it can enhance your business's connectivity.

Understanding the Basics

The Cisco SG500-52P-K9-NA is a Small Business Ethernet Switch, designed to facilitate seamless communication within a network. It falls under the Layer 2 category, which means it operates at the data link layer of the OSI (Open Systems Interconnection) model. In simpler terms, it manages the flow of data within a local area network (LAN). The Cisco SG500-52P-K9-NA is a 52-port stackable Managed Gigabits Ethernet Switch that is designed for small and medium-sized businesses. It has 48 Gigabit Ethernet ports and 4 Gigabit Ethernet combo ports (which can be used for either Copper or SFP connectivity). It is a Layer 2 switch, which means that it is capable of performing switching functions at the data link layer (layer 2) of the OSI model. This allows it to forward data between devices on the same network segment, based on the MAC addresses of the devices.

The Significance of 52 Ports

The "52-Ports" designation signifies the switch's capacity to connect 52 devices to the network simultaneously. These ports act as entry and exit points for data, allowing various devices like computers, printers, and servers to communicate with each other.

Resiliency and High Availability

The Cisco SG500-52P-K9-NA is a Layer 2 switch with 52 ports. One of its key features is resiliency and high availability, which helps ensure that the network remains up and running even in the event of a failure. This can be achieved through a number of mechanisms, such as redundancy in power supplies and fans, as well as the use of link aggregation to provide multiple paths for data to flow through the network. Additionally, the switch supports advanced features like Spanning Tree Protocol (STP) and Rapid Spanning Tree Protocol (RSTP) to prevent loops and ensure that there is always a clear path for data to travel.

Reliability of 52 Ports Switch

The Cisco SG500-52P-K9-NA is a Layer 2 switch with 52 ports, it is designed with reliability in mind to provide a robust and stable network. Some of the features that contribute to the reliability of this switch include:

Quality of Service (QoS) - Allows you to prioritize different types of traffic, ensuring that critical applications receive the bandwidth they need.

Advanced security - Features such as Access Control Lists (ACLs) and Network Admission Control (NAC) help to protect the network from unauthorized access and malware.

Link Aggregation Control Protocol (LACP) - Allows you to bundle multiple physical ports together to create a single logical link, providing redundancy and increasing the overall bandwidth.

redundancy in power supplies and fans - The switch can be configured with two power supplies and two fans, which helps ensure that the switch remains operational even if one of these components fails.

Key Features

Power over Ethernet (PoE)

One notable feature of the Cisco SG500-52P-K9-NA is its Power over Ethernet capability. This functionality enables the switch to deliver electrical power alongside data to connected devices, eliminating the need for separate power sources. This is particularly beneficial for devices like IP cameras, VoIP (Voice over Internet Protocol) phones, and other PoE-enabled devices.

Layer 2 Functionality

Being a Layer 2 switch, the Cisco SG500-52P-K9-NA focuses on the data link layer's functionalities. It efficiently manages traffic within the local network, using MAC addresses to forward data to the appropriate devices. This enhances the network's performance by reducing unnecessary data transmission.

Scalability and Performance

With 52 ports, this switch offers scalability to accommodate the growing connectivity needs of a business. Whether your organization is expanding or you're simply upgrading your network infrastructure, the Cisco SG500-52P-K9-NA provides the flexibility to add more devices without compromising performance.

Security Features

Security is a paramount concern in the digital age, and the Cisco SG500-52P-K9-NA addresses this with a range of security features. It supports features like VLANs (Virtual Local Area Networks) to segregate and secure network traffic, MAC address filtering for access control, and various authentication mechanisms to ensure that only authorized devices can connect to the network.

Quality of Service (QoS)

The switch prioritizes data traffic with its Quality of Service capabilities. This ensures that critical applications, such as video conferencing or VoIP calls, receive the necessary bandwidth and priority over less time-sensitive data. The result is a more efficient and responsive network, even during peak usage.

Use Cases

Small and Medium-sized Businesses (SMBs)

The Cisco SG500-52P-K9-NA is particularly well-suited for small and medium-sized businesses. Its affordability, ease of use, and robust feature set make it an ideal choice for organizations that may not have extensive IT resources but still require a reliable and efficient network infrastructure.

Office Environments

In office environments where multiple devices need to connect to the network, such as computers, printers, and IP phones, the Cisco SG500-52P-K9-NA excels. Its PoE capability simplifies cable management, and its Layer 2 functionality ensures efficient data flow within the local network.

Surveillance Systems

For businesses or facilities with surveillance systems relying on IP cameras, the PoE support of this switch becomes invaluable. It not only powers the cameras but also efficiently manages the data flow, ensuring seamless footage transmission and storage.

Advantages and Benefits
Cost-Effective Solution

The Cisco SG500-52P-K9-NA provides a cost-effective networking solution for businesses with moderate connectivity needs. Its affordability, coupled with a rich feature set, makes it an attractive choice for organizations with budget constraints.

Reliability and Durability

Cisco is a renowned name in the networking industry, known for producing reliable and durable equipment. The SG500-52P-K9-NA is no exception, offering a robust build that ensures consistent performance over an extended period.

Streamlined Network

The user-friendly interface and extensive configuration options contribute to streamlined network management. Even for users with limited technical expertise, the switch provides a manageable and efficient means of overseeing network operations.

Future-Proofing with Scalability

The switch's scalability ensures that your network can grow alongside your business. Instead of investing in new infrastructure with each expansion, the Cisco SG500-52P-K9-NA allows for the addition of more devices without compromising performance.

Enhanced Productivity with QoS

Quality of Service features enhance productivity by ensuring that critical applications receive the necessary resources. This is particularly beneficial in office environments where uninterrupted communication and efficient data flow are essential for daily operations.

General Information about the Cisco SG500-52P-K9-NA

  • Manufacturer: Cisco
  • Model Number or SKU# SG500-52P-K9-NA
  • Product Series: 500
  • Product Type: Ethernet Switch

Interfaces/Ports for 52 Ports Switch

  • Total Number of Ports: 52
  • Token Ring Port: No
  • LRE Port: No
  • Uplink Port: No
  • Bypass: No
  • Modular: No
  • Management Port: Yes
  • USB: No
  • Number of PoE (RJ-45) Ports: 48
  • Stack Port: Yes
  • Number of Network (RJ-45) Ports: 48

Performance of Ethernet Switch

  • Media Type Supported: Twisted Pair
  • Twisted Pair Cable Standard: Category 5
  • Ethernet Technology: Fast Ethernet, Gigabit Ethernet
  • Network Technology: 10/100/1000Base-T

Power Description for Manageable Switch

  • PoE (RJ-45) Port: Yes
  • Input Voltage: 110 V AC, 220 V AC
  • Power Source: Power Supply
  • Redundant Power Supply: No


  • Flow control, layer 2 switching, power over Ethernet (PoE)
  • VLAN support, IPv6 support, Spanning Tree Protocol (STP) support
  • Rapid Spanning Tree Protocol (RSTP) support
  • Multiple Spanning Tree Protocol (MSTP) support, Access Control List (ACL) support
  • Quality of Service (QoS), reset button, LACP support, Energy Efficient Ethernet, Dynamic VLAN Support (GVRP)

Compliant Standards

  • IEEE 802.3, IEEE 802.3u, IEEE 802.3z, IEEE 802.1D, IEEE 802.1Q
  • IEEE 802.3ab, IEEE 802.1p, IEEE 802.3af, IEEE 802.3x, IEEE 802.3ad (LACP)
  • IEEE 802.1w, IEEE 802.1x, IEEE 802.1s, IEEE 802.3at, IEEE 802.3az

I/O Expansions

  • Number of Total Expansion Slots: 4
  • Number of SFP Slots: 4
Network and Communication
  • Layer Supported: 2
Management and Protocols
  • Manageable: Yes
  • Management:
  • GUI
  • CLI
  • DHCP
  • VLAN
  • QoS
  • SNMP
  • Standard Memory: 256 MB
  • Flash Memory: 32 MB
Environmental Parameters
  • Min Operating Temperature: 32 °F
  • Max Operating Temperature: 104 °F
  • Humidity Range Operating: 10 - 90% (non-condensing)
  • Min Storage Temperature: -4 °F
  • Max Storage Temperature: 158 °F
  • Humidity Range Storage: 10 - 90% (non-condensing)

In summary, the Cisco SG500-52P-K9-NA Small Business 52-Ports Layer 2 Ethernet Switch stands as a reliable and cost-effective solution for businesses seeking efficient network management. Its blend of essential features, ease of use, and scalability make it an ideal choice for small to medium-sized enterprises looking to enhance their connectivity. By understanding its capabilities and limitations, businesses can make informed decisions to meet their networking requirements effectively.

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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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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