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Direct attach cable works flawlessly at 10G speeds.
DEM-CB300S
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D-Link 10G SFP+ direct connection, 3 meters
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DEM-CB300S
- Description:
- D-Link 10G SFP+ direct connection, 3 meters
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- D-Link
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- 98378308910
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DEM-CB300S Overview
DEM-CB300S is a high-performance rack-mount switch engineered with a robust architecture that supports scalable stacking and seamless integration in demanding networks. It offers versatile power options through an AC power supply, a comprehensive range of ports, and advanced performance features designed for mission-critical applications and diverse use cases.
DEM-CB300S delivers reliable Layer 2 switching with managed configuration options, enabling network administrators to optimize connectivity with POE+ and SFP port support. Its scalable design ensures efficient performance under varying workloads, making it ideal for enterprise edge deployments and branch office setups.
DEM-CB300S price is is available on request. Get immediate quote.
Request bulk order quote for DEM-CB300S for additional pricing. Browse the full D-Link Switch Accessories series or explore all D-Link products.
DEM-CB300S Specifications
- Product Type
- Switch
- Power Source
- AC Power Supply
- Layer Supported
- Layer 2
- Form Factor
- Rack-mount
- Power Consumption
- N/A
- Number of Ethernet Ports
- 24–48 Ports
- Number of Downlink Ports
- 24 Ports
- Manageable
- Managed
- Ethernet Technology
- 10/100/1000
- Media Type Supported
- Combo
- Redundant Power Supply Supported
- No
- Manufacturer Part Number
- DEM-CB300S
- Uplink Configuration
- 1G
- IOS
- LAN Base
- POE Support
- POE+
- SFP Ports
- 4 SFP Ports
- Memory
- 256 MB
- Rack Units
- 1 RU
- Interface Ports
- 10/100/1000
- Port/Expansion Slot Details
- N/A
- Flash Memory
- 64 MB
- Switching Capacity
- 56 Gbps
- Switching Capacity with Stacking
- 112 Gbps
- Product Name
- DEM-CB300S Access Switch
- Height
- 1.75 inches
- Width
- 19 inches
- Depth
- 10 inches
- Weight
- 8 lbs
DEM-CB300S Use Case
High-Density Data Center Server-to-Switch Link
In a modern data center deploying virtualization and containerized workloads, the DEM-CB300S-D-Link 10G SFP+ direct connection, 3 meters creates a plug-and-play 10 GbE uplink between top-of-rack switches and high-performance compute servers. This dedicated fiber channel minimizes latency (<0.2 µs), maximizes throughput (up to 10 Gbps), and lowers operational costs by eliminating transceiver mismatches—delivering enterprise-grade reliability and scalable bandwidth for mission-critical applications.
Ultra-Low-Latency Financial Trading Network
For algorithmic trading firms requiring sub-microsecond execution, the DEM-CB300S-D-Link 10G SFP+ direct connection, 3 meters links trading servers directly to the network switch fabric. This turnkey 10 GbE solution reduces jitter and packet loss, accelerates order entry and market data feeds, and ensures compliance with financial industry uptime SLAs—delivering a measurable edge in electronic trading performance.
Real-Time 4K Video Editing Storage Backbone
In broadcast and post-production studios, editors and colorists rely on seamless 4K/8K media streams. The DEM-CB300S-D-Link 10G SFP+ direct connection, 3 meters provides a high-bandwidth, low-latency link between network storage arrays and shared editing workstations. This dedicated 10 GbE interconnect ensures uninterrupted playback, faster project file access, and collaborative workflows—boosting productivity and meeting tight broadcast deadlines.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| DEM-CB300S |  DEM-CB100S |  DEM-310GT | |
|---|---|---|---|
| Depth | 10 inches | 14.5 inches | 11 inches |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Flash Memory | 64 MB | 32 MB | 64 MB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount |
| Height | 1.75 inches | 1.75 inches | 1.75 inches |
| IOS | LAN Base | LAN Lite | LAN Lite |
| Interface Ports | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Layer Supported | Layer 2 | Layer 2 | Layer 2 |
| Manageable | Managed | Managed | Managed |
| Manufacturer Part Number | DEM-CB300S | DEM-CB100S | DEM-310GT |
| Media Type Supported | Combo | Twisted Pair | Twisted Pair |
| Memory | 256 MB | 128 MB | 256 MB |
| Number of Downlink Ports | 24 Ports | 24 Ports | 24 Ports |
| Number of Ethernet Ports | 24–48 Ports | 24–48 Ports | 24–48 Ports |
| POE Support | POE+ | Non POE | POE+ |
| Port/Expansion Slot Details | N/A | 24 fixed Ethernet ports with 4 SFP uplink slots | 24 RJ45 Ethernet ports, 4 SFP uplink ports |
| Power Consumption | N/A | 50 W | N/A |
| Power Source | AC Power Supply | AC Power Supply | AC Power Supply |
| Product Name | DEM-CB300S Access Switch | DEM-CB100S Business Switch | DEM-310GT Gigabit Managed Switch |
| Product Type | Switch | Switch | Switch |
| Rack Units | 1 RU | 1 RU | 1 RU |
| Redundant Power Supply Supported | No | No | No |
| SFP Ports | 4 SFP Ports | 4 SFP Ports | 4 SFP Ports |
| Switching Capacity | 56 Gbps | 52 Gbps | 128 Gbps |
| Switching Capacity with Stacking | 112 Gbps | 104 Gbps | 256 Gbps |
| Uplink Configuration | 1G | 1G | 10G |
| Weight | 8 lbs | 8 lbs | 12 lbs |
| Width | 19 inches | 17.5 inches | 17.5 inches |
Reviews & Ratings
H
Haris Mahmood
4
Reliable connection with no signal issues.
M
Martin Young
5
Good quality cable for short range links.
S
Shoaib Anwar
5
Plug and play with stable performance.
V
Victor Stone
4
Solid DAC cable.
Questions & Answers
What is the D-Link DEM-CB300S 10G SFP+ direct attach cable?
The D-Link DEM-CB300S is a 3-meter passive copper Direct Attach Cable (DAC) with dual SFP+ connectors, designed for 10 Gbps server-to-switch and switch-to-switch connections.
What data transfer rate does the DEM-CB300S support?
The DEM-CB300S supports a sustained 10 Gbps data rate, ensuring line-rate performance for demanding data center and campus network applications.
How long is the D-Link 10G SFP+ cable DEM-CB300S?
The DEM-CB300S cable is precisely 3 meters (9.8 feet) in length, offering optimal reach for rack-mounted equipment in data centers and wiring closets.
Which connectors are used on the DEM-CB300S cable?
The DEM-CB300S features two industry-standard SFP+ connectors with metal shells, providing reliable mating, low insertion loss, and secure latching.
Which devices are compatible with the DEM-CB300S 10G SFP+ cable?
The DEM-CB300S is interoperable with most SFP+ ports from D-Link, Cisco, Juniper, HPE, Dell, Arista, Brocade and other major networking vendors.
Can I use the DEM-CB300S for server-to-switch and switch-to-switch links?
Yes. The DEM-CB300S is optimized for both server-to-switch uplinks and switch-to-switch stacking in 10 GbE environments.
Does the DEM-CB300S support hot-plugging?
Yes. The DEM-CB300S supports SFP+ hot-swapping, allowing you to install or remove the cable without shutting down networking equipment.
What is the operating temperature range of the DEM-CB300S?
The DEM-CB300S operates reliably between 0 °C and 70 °C (32 °F to 158 °F), making it suitable for standard data center conditions.
Is the DEM-CB300S cable shielded to prevent electromagnetic interference?
Yes. The DEM-CB300S features fully shielded connectors and twisted-pair copper conductors to minimize EMI and crosstalk in high-density racks.
Do I need special drivers or firmware updates to use the DEM-CB300S?
No additional drivers or firmware are required. Simply plug the DEM-CB300S into compatible SFP+ ports for immediate 10 Gbps connectivity.
What warranty covers the D-Link DEM-CB300S cable?
D-Link provides a limited lifetime warranty on the DEM-CB300S, covering manufacturing defects and ensuring long-term reliability.
How do I install the D-Link 10G SFP+ direct attach cable?
Align each SFP+ connector with the port until it clicks, press firmly to latch, and confirm link lights on both devices for successful installation.
What are the advantages of using a Direct Attach Cable over fiber optics?
Direct Attach Cables like the DEM-CB300S offer lower latency, zero transceiver power draw, cost-effective deployment and simplified installation compared to fiber.
Is the DEM-CB300S cable multi-vendor compatible?
Yes. The DEM-CB300S meets SFF-8431 and SFF-8472 specifications, ensuring compatibility with SFP+ ports from leading network equipment vendors.
How does a passive DAC differ from an active DAC cable?
A passive DAC like the DEM-CB300S uses no signal conditioning electronics, relying on the host for equalization, whereas active DACs include built-in circuitry.
Where can I purchase the D-Link DEM-CB300S 3m 10G SFP+ cable?
The DEM-CB300S is available from authorized D-Link resellers, online marketplaces, and the official D-Link eStore with global shipping options.