Cisco WS-C3750G-48PS-S Ethernet Switch
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Cisco WS-C3750G-48PS-S Catalyst 3750 48 Ports Switch Refurbished

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Part Number#: WS-C3750G-48PS-S
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Short Description:
WS-C3750G-48PS-S Catalyst 3750 Series 48 Ports 10/100/1000T RJ-45 Power Over Ethernet (PoE) Manageable Layer 3 Rack-Mountable Ethernet Switch | Made by Cisco | Refurbished
Product Condition:
Warranty provided by ALLHDD.COM:
90 Days

Overview of the Manageable Switch

Cisco WS-C3750G-48PS-S is a powerful member of the Catalyst 3750 Series, designed to meet the evolving networking needs of businesses. This Ethernet switch offers 48 ports with 10/100/1000T RJ-45 connectivity, Power over Ethernet (PoE) capabilities, and robust manageability features. In this detailed exploration, we will delve into the key features, benefits, and technical specifications of the Cisco WS-C3750G-48PS-S, shedding light on its significance in the realm of networking solutions.

Key Features

Port Configurations

  • The Cisco WS-C3750G-48PS-S is equipped with 48 ports, providing versatile connectivity options for devices in a network. These ports support 10/100/1000T RJ-45, offering the flexibility to connect a wide range of devices with varying speed requirements.

Power Over Ethernet (PoE) Capability

  • One standout feature of this switch is its Power over Ethernet capability. PoE enables the switch to deliver both data and electrical power to connected devices, such as IP cameras, VoIP phones, and wireless access points, eliminating the need for separate power sources. This not only simplifies installation but also enhances the efficiency of the network infrastructure.


  • The WS-C3750G-48PS-S is designed with advanced manageability features, making it a suitable choice for complex network environments. It supports Layer 3 routing, allowing for efficient traffic management and improved network performance. The switch is also rack-mountable, offering ease of installation and space optimization in data center environments.

Benefits of Cisco WS-C3750G-48PS-S

Enhanced Flexibility

  • With 48 ports supporting various speeds, this switch offers unmatched flexibility in connecting a diverse range of devices. Whether it's computers, printers, or high-speed servers, the WS-C3750G-48PS-S ensures seamless communication across the network.

Cost-Efficient Power Distribution

  • The PoE capability of the switch is a cost-effective solution for powering devices over the Ethernet cable. This eliminates the need for additional power sources and simplifies cable management, contributing to a more organized and economical network setup.

Optimized Network Performance

  • The Layer 3 routing capability enhances the switch's ability to manage traffic efficiently. By making routing decisions at the network layer, the WS-C3750G-48PS-S reduces congestion and improves overall network performance, ensuring a smooth and responsive user experience.

Scalability for Growing Networks

  • Designed with scalability in mind, the Cisco Catalyst 3750 Series allows businesses to expand their networks seamlessly. As the demand for network resources increases, the WS-C3750G-48PS-S provides a reliable foundation that can adapt to evolving requirements.

Technical Specifications

Physical Specifications

  • Dimensions: The switch has dimensions of [insert dimensions].
  • Weight: It weighs [insert weight].
  • Form Factor: The rack-mountable design makes it suitable for standard data center racks.

Performance and Capacity

  • Switching Capacity: The WS-C3750G-48PS-S has a high switching capacity, ensuring efficient data transfer within the network.
  • Forwarding Rate: With a commendable forwarding rate, the switch delivers low-latency performance for time-sensitive applications.

Power Over Ethernet (PoE) Details

  • PoE Standard: The switch adheres to [insert PoE standard], ensuring compatibility with a wide range of PoE-enabled devices.
  • PoE Budget: The total PoE budget specifies the maximum power the switch can deliver to connected devices simultaneously.

Security Features

  • Layer 3 Routing: The switch supports Layer 3 routing, enhancing its capabilities for managing complex networks.
  • Security Features: [Insert details about security features, such as access control lists (ACLs), port security, etc.]

Use Cases

The Cisco WS-C3750G-48PS-S finds applications in various scenarios due to its versatile features. Some common use cases include:

Enterprise Networks

  • In large enterprises with diverse networking needs, the WS-C3750G-48PS-S provides the necessary scalability and performance to support a multitude of devices and applications.

IP Surveillance Systems

  • The PoE capability makes this switch ideal for IP surveillance systems where cameras need both data connectivity and power supply. The switch simplifies the deployment of surveillance networks by eliminating the need for separate power sources.

Voice over IP (VoIP) Deployments

  • With the ability to provide power to VoIP phones through the Ethernet cable, the WS-C3750G-48PS-S streamlines the implementation of VoIP systems, contributing to a more efficient and cost-effective communication infrastructure.

Power Supply and Power Consumption Considerations

The WS-C3750G-48PS-S Cisco Catalyst 3750 48 Ports Manageable Switch has two power supply options: a 715W AC power supply and a 440W DC power supply. When selecting a power supply, consider the following factors:

Power Consumption of the Switch

  • The switch's power consumption depends on the number of ports used, the type of modules installed, and the level of network activity.
  • The WS-C3750G-48PS-S switch has a maximum power consumption of 530W.


  • It is recommended to have redundant power supplies for high availability and to ensure uninterrupted operation in the event of a power supply failure.
  • The switch can support up to two power supplies, and they can be configured in either redundant or combined mode.

Power Supply Compatibility

  • Ensure that the selected power supply is compatible with the switch and the power input voltage.
  • The 715W AC power supply can accept an input voltage range of 100-240VAC, while the 440W DC power supply can accept an input voltage range of -40 to -60VDC.

Environmental Conditions

  • Consider the environmental conditions of the installation site, such as temperature and humidity, which can affect the performance and lifespan of the power supply.

Power Management

  • Configure power management settings to optimize power usage and reduce energy costs.
  • The switch supports features such as Energy Efficient Ethernet (EEE) and Power over Ethernet (PoE) to help conserve power.

When configuring the switch, use the "show power inline" command to check the power consumption of each PoE device connected to the switch. Use the "show power" command to check the power supply status and power usage of the switch.

It is important to properly size and configure the power supply to ensure reliable operation and prevent power-related issues. It is recommended to consult the Cisco documentation or consult with a certified Cisco professional for specific power supply and power consumption considerations for the WS-C3750G-48PS-S switch.

Configuring Quality of Service (QoS) on the Switch

To configure the Quality of Service (QoS) for WS-C3750G-48PS-S Cisco Catalyst 3750 48 Ports Manageable Switch, you can follow these steps:

Determine your QoS requirements

  • Identify which traffic requires priority and which traffic can tolerate delay or packet loss.
  • Determine the amount of bandwidth required for each traffic class.

Configure QoS settings on the switch

  • Use the "class-map" command to create traffic classes based on the requirements identified in step 1. For example, "class-map voice" creates a traffic class for voice traffic.
  • Use the "policy-map" command to create QoS policies for each traffic class. For example, "policy-map voice-policy" creates a policy for the voice traffic class.
  • Use the "priority" command to assign a priority queue to the voice traffic class. For example, "priority percent 50" assigns 50% of the available bandwidth to the voice traffic class.
  • Use the "bandwidth" command to allocate bandwidth to other traffic classes. For example, "bandwidth percent 30" allocates 30% of the available bandwidth to the video traffic class.

Apply QoS policies to switch ports

  • Use the "interface" command to select the switch port to apply the QoS policy to. For example, "interface GigabitEthernet1/0/1" selects port GigabitEthernet1/0/1.
  • Use the "service-policy" command to apply the QoS policy to the selected port. For example, "service-policy input voice-policy" applies the voice QoS policy to the selected port.

Verify QoS configuration

  • Use the "show policy-map interface" command to verify that the QoS policy is applied to the correct ports and traffic classes.
  • Use the "show interface" command to verify that the QoS settings are being applied correctly and that there are no errors or drops on the port.

General Information about this Cisco WS-C3750G-48PS-S

  • Manufacturer: Cisco
  • Model Number or SKU# WS-C3750G-48PS-S
  • Product Line: Catalyst
  • Product Series: 3750
  • Product Model: 3750G-48PS
  • Type: Networking
  • Product Type: Ethernet Switch

Interfaces and Ports of L3 Ethernet Switch

  • Total Number of Network Ports: 48
  • Port/Expansion Slot Details: 48 x Gigabit Ethernet Network
  • Port/Expansion Slot Details: 4 x Gigabit Ethernet Expansion Slot

Performance of 48 Ports Switch

  • Media Type Supported: Twisted Pair
  • Twisted Pair Cable Standard: Category 5
  • Ethernet Technology: Gigabit Ethernet
  • Network Technology: 10Base-T
  • Network Technology: 10/100/1000Base-T
  • MTBF (Mean Time Between Failures): 141,005 Hours

I/O Expansions

  • Number of Total Expansion Slots: 4
  • Expansion Slot Type: SFP (Small Form-Factor Pluggable)
  • Number of SFP Slots: 4

Network & Communication

  • Layer Supported: 3 (Layer 3)

Management & Protocols

  • Manageable: Yes


  • Standard Memory: 128 MB
  • Memory Technology: DRAM (Dynamic Random Access Memory)
  • Flash Memory: 32 MB

Power Description

  • Input Voltage: 110 V AC, 220 V AC
  • Power Source: Power Supply
  • Redundant Power Supply: Yes

In short, the Cisco WS-C3750G-48PS-S Catalyst 3750 Series Ethernet switch stands as a robust solution for modern networking challenges. With its versatile port configurations, Power over Ethernet capabilities, and advanced manageability features, it caters to the diverse needs of businesses, ranging from large enterprises to specialized applications like IP surveillance and VoIP deployments. The detailed exploration of its key features, benefits, technical specifications, use cases, installation, and maintenance procedures provides a comprehensive understanding of the switch's capabilities and how it can contribute to the success of network infrastructures. As businesses continue to evolve, having a reliable and scalable networking solution like the WS-C3750G-48PS-S becomes increasingly crucial for achieving efficiency and performance in the digital age.

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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ALLHDD guarantees that the products will not have defects in material that will affect the product's functionality during the Standard Warranty Period. The warranty period starts when the merchandise/items from our warehouse.

What does ALLHDD.Com warranty cover?

30-days to 3 years warranty:

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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(b) any misuse outside the instructions in the user manual for any specific product;

(c) damaged caused by other hardware or equipment. The warranty will void if the item is returned with physical damage, damage to the retail box, removed from the box, counterfeit labels/labelled by them, or any modifications of internal and external covers. Data loss or damages to any other equipment we do not cover by our offered warranty.

What is the Manufacturer/Brand Warranty?

In general, a manufacturer's warranty service/support is a written guarantee to the buyer of a product. Its terms assure the replacement or repair of the product, if necessary, within a specified period after the purchase (2-5 years depending on the brand/manufacturer). It is typically included in the price of the product. Products are brand new and sealed and the original manufacturer box is complete with the Manufacturer's genuine warranty. For most of the brand new/retail products that come with the manual and box, exceptions may apply (i.e., Cisco, Juniper Networks).

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