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D-Link DGS-3120-24PC 24-Port xStack Layer 2 Stackable PoE Gigabit Switch
D-Link (0790069344367 / DGS-3120-24PC/SI) - 10g support - IGMP snooping - Jumbo frames support - Link aggregation - Multicast support - Basic switching RJ-45 Ethernet ports quantity: 20 - SFP module slots quantity: 4
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Introducing the D-Link DGS-3120-24PC: A Robust Layer 2 Stackable PoE Gigabit Switch
The D-Link DGS-3120-24PC is a high‑performance, Layer 2+ managed switch designed for demanding network environments. With its combination of 20 RJ‑45 Gigabit ports, 4 SFP+ uplink slots, and PoE+ support, this device delivers exceptional flexibility and scalability.
Key Design Features
- Port Configuration: 20 standard RJ‑45 Gigabit Ethernet ports for local connectivity; 4 combo SFP+/SFP slots for fiber uplinks or additional network expansion.
- Power over Ethernet (PoE+): Supports PoE+ to power IP cameras, VoIP phones, and wireless access points directly from the switch, eliminating the need for separate power supplies.
- Stacking Capability: xStack technology allows multiple units to be stacked into a single logical device, providing up to 40 Gbps of stacking bandwidth and simplifying management.
- Layer 2+ Intelligence: Advanced switching features such as IGMP snooping, link aggregation (LACP), VLANs, ACLs, and QoS ensure efficient traffic handling and network segmentation.
Performance & Capacity
The DGS-3120‑24PC offers a switching capacity of 88 Gbps, enabling it to handle heavy traffic loads without bottlenecks. Its internal packet buffer memory of 2 MB and flash storage of 32 MB provide ample space for routing tables, configuration files, and firmware updates.
With support for 10G Ethernet, the switch can forward traffic at 1 Gbps per port while still maintaining high throughput across the stack. The device also supports jumbo frames (up to 9,216 bytes), reducing CPU overhead and improving performance for large file transfers.
Management & Security
The switch can be managed via Telnet, HTTP, and RADIUS, allowing administrators to configure settings remotely or integrate with existing authentication systems. It also includes built‑in support for IPv6, ensuring future‑proof connectivity.
Security features such as ACLs (Access Control Lists), loop detection, and port security help protect the network from unauthorized access and broadcast storms.
Environmental & Physical Specifications
- Dimensions: 440 mm width × 310 mm depth × 44 mm height; packaged at 450 mm × 510 mm × 121 mm.
- Weight: 5.31 kg, making it lightweight for rack mounting or wall installation.
- Operating Temperature: -40 °C to +70 °C (storage); 0 °C to +50 °C (operation).
- Humidity: 10–90 % relative humidity during operation; 5–90 % during storage.
- Power Input: 100–240 V AC, 50/60 Hz.
- Noise Level: 50.8 dB, suitable for office and data‑center environments.
Compliance & Certifications
The DGS-3120‑24PC meets a wide range of international safety and electromagnetic compatibility standards, including FCC A, CE A, VCCI A, IC, C‑Tick, CB, cUL, LVD. These certifications guarantee reliable operation across global markets.
Use Cases & Deployment Scenarios
Enterprise LANs: Ideal for office buildings requiring robust PoE+ support for security cameras and wireless access points.
Campus Networks: Stackable design allows seamless expansion across multiple floors or buildings while maintaining a single management interface.
Industrial Automation: Rugged construction and wide temperature range make it suitable for factory floor deployments where environmental conditions can be harsh.
Technical Highlights Summary
| Feature | Description |
|---|---|
| Port Count | 20 RJ‑45 + 4 SFP+ |
| PoE+ Support | Yes, up to 370 W total power budget |
| Stacking Bandwidth | 40 Gbps (xStack) |
| Switching Capacity | 88 Gbps |
| Memory | 2 MB packet buffer, 32 MB flash |
| Management Protocols | Telnet, HTTP, RADIUS |
| Advanced Features | IGMP snooping, LACP, VLAN, ACL, QoS, IPv6 |
| Compliance | FCC A, CE A, VCCI A, IC, C‑Tick, CB, cUL, LVD |
Conclusion
The D-Link DGS-3120-24PC stands out as a versatile, high‑throughput switch that combines PoE+ power delivery, stackable architecture, and Layer 2+ intelligence. Its robust feature set, extensive compliance certifications, and solid build quality make it an excellent choice for organizations seeking reliable network infrastructure capable of scaling with future demands.
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| Identifiers | |
| Brand |  D-Link is a Taiwanese networking equipment manufacturer that produces a wide range of products for the consumer, small business, and enterprise markets. Some of their most popular products include wireless routers, switches, and network attached storage devices. D-Link has a strong reputation for quality and reliability, and their products are often praised for their feature-richness and ease of use. |
| MPN | D-Link 0790069344367 |
| Model | D-Link DGS-3120-24PC/SI |
| ID | 5406463 |
| Dimensions / Weight | |
| Key Features | |
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10g support Indicates whether the product supports 10 Gigabit Ethernet (10 GbE) connectivity, either through dedicated 10 GbE ports or via SFP+ modules that enable 10 GbE operation.
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Yes |
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Basic switching RJ-45 Ethernet ports quantity Indicates the total count of physical RJ‑45 Ethernet connectors available on a device for wired network connectivity. The value is an integer representing how many separate ports can be used to connect Ethernet cables.
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20 |
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Certification A list of official certifications or compliance marks that the product has received from regulatory bodies, safety organizations, or industry standards groups. Each entry represents a distinct certification such as CE, FCC, RoHS, UL, or WEEE, and may include additional details like version numbers or specific test reports.
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FCC A, CE A, VCCI A, IC, C-Tick |
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Depth The linear measurement of an object from front to back or top to bottom, expressed in a physical unit such as millimeters, centimeters, inches, etc. It indicates how deep the item is and can be used for fitting, compatibility, or spatial planning.
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310 mm |
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DHCP features A comma‑separated list of the DHCP roles and options that a device can provide or use, such as server, client, relay, snooping, option 82 support, and IPv6 variants. The value may contain multiple items for a single product.
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DHCP client |
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Flash memory The total amount of internal flash memory available in a device, expressed as a data size (e.g., megabytes or gigabytes). This attribute indicates how much data can be stored on the device’s built‑in flash storage.
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32 MB |
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Heat dissipation The amount of thermal energy a product can dissipate, expressed in a standard unit such as BTU per hour or watts. It indicates the cooling requirement and helps compare how much heat the device generates during operation.
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3188691 BTU/h |
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Height The vertical dimension of a product measured from its lowest to highest point. It is expressed in a physical unit such as millimetres, centimetres or inches and applies to any item where height is relevant, including books, electronics, furniture and other objects.
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44 mm |
| IGMP snooping | Yes |
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Input frequency The frequency of the alternating current supplied to a power supply or charger, expressed in hertz (Hz). It indicates the acceptable operating range for the electrical mains that powers the device, ensuring proper functionality and safety.
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50/60 Hz |
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Input voltage The range of alternating current voltage that a charger or power supply can accept, expressed in volts (V). It specifies the minimum and maximum input voltages compatible with the device.
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100 - 240 V |
| Jumbo frames support | Yes |
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Link aggregation Indicates whether the device can combine multiple network connections into a single logical link to increase bandwidth or provide redundancy.
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Yes |
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MAC address table The total count of unique MAC addresses that the device can store in its forwarding table. This value indicates how many devices can be simultaneously connected before the switch must start discarding or aging out older entries.
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16000 entries |
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Management protocols A list of network protocols that a device can use for configuration, monitoring and remote management, such as SNMP, HTTP/HTTPS, Telnet, SSH or other standard interfaces. Each protocol is represented by its common name and may be separated by commas or slashes in the source data.
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Telnet, RADIUS, HTTP |
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Maximum data transfer rate The highest theoretical speed at which a device can send or receive data, expressed in bits per second (bps) or its multiples such as kbps, mbps, gbps, etc. This value represents the upper bound of throughput under optimal conditions and is useful for comparing performance across devices and interfaces.
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1 Gbit/s |
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Multicast support Indicates whether the device can send or receive IP multicast traffic, allowing it to participate in group communications such as streaming media, IPTV, and certain network protocols that rely on multicast distribution.
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Yes |
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Networking features A list of the networking protocols and standards that a device can support or comply with, such as IEEE 802.11 variants for wireless, IEEE 802.3 for Ethernet, or other relevant networking specifications. The values are typically separated by commas and may include both technical identifiers and consumer‑friendly labels.
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Gigabit Ethernet |
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Noise level The sound intensity produced by a product, expressed in decibels (dB) or sones. It indicates how loud the device is during operation and helps users assess suitability for quiet environments.
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50.8 dB |
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Package depth The linear measurement from front to back or top to bottom of a product’s packaging, expressed in a physical unit such as millimeters, centimeters, inches, etc. It indicates how deep the packaged item is and can be used for fitting, compatibility, or spatial planning.
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510 mm |
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Package Height The vertical dimension of a product’s packaging measured from its lowest to highest point. It is expressed in a physical unit such as millimetres, centimetres or inches and helps customers assess how tall the package will be when stored or shipped.
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121 mm |
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Package width The horizontal measurement of a product’s packaging, expressed in a linear unit such as millimetres or inches. It indicates how wide the package is from one side to the other and helps customers assess fit for storage, shipping, or display.
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450 mm |
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Packet buffer memory The amount of temporary storage that a device allocates in its internal memory for buffering data before processing or forwarding it. Expressed as a digital capacity (e.g., kilobytes, megabytes), this value indicates how much information the hardware can hold at once and influences performance when handling high‑throughput or bursty traffic.
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2 MB |
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Pallet length The linear dimension of a pallet measured in a standard unit such as meters, centimeters or inches. It represents the overall length from one end to the other and is used to compare the size of pallets across different products and logistics contexts.
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110 cm |
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Pallet width The horizontal measurement of a pallet, expressed in a linear unit such as millimetres or inches. It indicates how wide the pallet is from one side to the other and helps customers assess fit for storage, shipping, or display.
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120 cm |
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Safety A list of safety and regulatory certifications that a product complies with, such as CE, UL, FCC, or other regional standards.
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CB, cUL, LVD |
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SFP module slots quantity The total count of Small Form‑factor Pluggable (SFP) ports available on a networking device, such as switches or routers. Each port can accept an SFP transceiver module for fiber or copper connections, allowing the device to support additional network interfaces.
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4 |
| Supported data transfer rates | 10/100/1000 Mbps |
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Switch type The classification of a network switch based on its management capabilities, such as Managed or Unmanaged. This attribute indicates whether the device can be configured and monitored remotely (Managed) or operates with fixed settings without remote configuration (Unmanaged). It helps users choose a switch that matches their networking expertise and control requirements.
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Managed |
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Switching capacity The maximum data transfer rate that the device can handle, expressed as a numeric value with an appropriate unit such as Gbit/s or Mbit/s. This attribute indicates how quickly data can be transmitted through the device and helps users compare networking performance across products.
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88 Gbit/s |
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Weight The mass of the product expressed in a standard unit such as grams or kilograms. It represents how heavy the item is and can be used for shipping calculations, handling instructions, or consumer information.
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5.31 kg |
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Width The horizontal measurement of a product, expressed in a linear unit such as millimetres or inches. It indicates how wide the item is from one side to the other and is used for sizing, fitting, and compatibility purposes.
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440 mm |
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