D-Link DGS-3120-48TC/SI


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D-Link DGS-3120 xStack Series - Switch 48-Port Gigabit XStack
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Enhanced network reliability

The D-Link DGS-3120 xStack Series are enhanced L2 access stackable switches designed to connect end-users in a secure SMB or enterprise network. These switches support physical stacking, multicast and enhanced security, making them an ideal Gigabit access layer solution. The DGS-3120-24TC/48TC provides 20 or 44 10/100/1000 Mbps Gigabit Ethernet ports and 4 combo 1000BASE-T/SFP Gigabit Ethernet ports. The DGS-3120-24PC/48PC provides 24 or 48 10/100/1000 Mbps PoE Gigabit Ethernet ports and 4 combo 1000BASE-T/SFP Gigabit Ethernet ports. Each 10/100/1000 Mbps port of DGS-3120-24PC/48PC supports 802.3af and 802.3at Power over Ethernet standard. The default power budget is 370 Watts and can be expanded to 740 Watts with the DPS-700 RPS. The DGS-3120 xStack Series switches are also equipped with an SD Card slot, allowing the user to boot images and upload configuration files directly from an SD Card. Furthermore, syslog files can also be conveniently saved to a card.

General Information

  • Product Type: Ethernet Switch
  • Product Series: DGS-3120
  • Brand Name: D-Link
  • Manufacturer: D-Link Systems, Inc
  • Product Model: DGS-3120-48TC
  • Product Name: xStack DGS-3120-48TC Ethernet Switch with SI Image
  • Product Line: xStack

Physical Characteristics

  • Height: 1.7"
  • Width: 17.3"
  • Depth: 12.2"


  • Number of Network (RJ-45) Ports: 48
  • Stack Port: Yes
  • Total Number of Network Ports: 48
  • Port/Expansion Slot Details:
    • 48 x Gigabit Ethernet Network
    • 4 x Gigabit Ethernet Expansion Slot
  • Number of Stack Ports: 2

Management & Protocols

  • Manageable: Yes
  • Management:
    • Web-based interface
    • Command Line Interface
    • Telnet
    • SNMP v1/v2c/v3
    • RMON 1, 2, 3, 9
    • DHCP
    • MIB
    • VLAN
    • QoS

Power Description

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

Media & Performance

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

I/O Expansions

  • Number of Total Expansion Slots: 5
  • Expansion Slot Type: SFP
  • Number of SFP Slots: 4
  • Shared SFP Slot: Yes


  • Memory Card Supported: Secure Digital (SD) Card
  • Flash Memory: 32 MB


  • Green Compliant: Yes
  • Green Compliance Certificate/Authority: RoHS

Network & Communication

  • Layer Supported: 2

Full specifications (PDF)


Customer Review Summary

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Protect Your Product

The D-Link DGS-3120-48TC/SI is also known as DGS-3120-48TC/SI or DGS312048TCSI .