Shipping included*
Exclusions
Additional shipping fees may apply in rare circumstances for deliveries outside standard service areas. In most cases, this only potentially affects shipments to the Northwest Territories and Yukon, as well as certain heavy or oversized items.
Black Box LGB5124A-R2 SFP Gigabit Managed Fiber Switch - 4 RJ-45 + 20 SFP Slots - Layer 2 - Rack-Mountable
Business volume discounts
Technical guidance
Preparation & staging
QC · ON · AB · BC
Product Features
Technical Overview
This switch operates as a full-featured Layer 2 managed switch with support for key networking standards including IEEE 802.1Q for VLANs, IEEE 802.1D for spanning tree, and IEEE 802.3ad for link aggregation. The four combo ports each support either twisted pair copper connections via RJ-45 or fiber connections via SFP modules, providing deployment flexibility.
With twenty SFP expansion slots, the switch offers substantial capacity for fiber optic connections, supporting 1000Base-X and 10GBase-X technologies. The built-in power supply delivers stable operation with a typical power draw of 38.64 watts.
Relevant factors for this section include Total Number of Network Ports, Network (RJ-45), Uplink Port, Media Type Supported. When those points are considered together, they give buyers a clearer picture of how the product is equipped, how it fits into deployment, and what kind of day-to-day role it is meant to support.
Key Product Advantages
The LGB5124A-R2 delivers a balanced combination of copper and fiber connectivity in a managed switching platform. Its hybrid port design allows network administrators to deploy the optimal media type for each connection while maintaining centralized management control.
Flexible Media Support
Each of the four combo ports accepts either standard RJ-45 twisted pair cables or SFP fiber modules, enabling seamless integration with existing copper infrastructure while providing migration paths to fiber optic networks.
- Supports both copper and fiber connections
- Enables gradual network upgrades
- Reduces hardware redundancy needs
Substantial Expansion Capacity
With twenty dedicated SFP slots, the switch offers significant fiber connectivity expansion beyond the base combo ports, supporting high-density fiber deployments and backbone connections.
- 20 SFP slots for fiber expansion
- Supports 10GBase-X technology
- Enables fiber backbone deployment
Professional Management Features
As a managed Layer 2 switch, it provides comprehensive control over network configuration, monitoring, and optimization through standard management interfaces and protocols.
- Full Layer 2 feature set
- Supports VLANs and link aggregation
- Enables network segmentation and optimization
Deployment / Use Cases
This switch is particularly well-suited for environments requiring a mix of copper and fiber connectivity with centralized management. Its combination of combo ports and extensive SFP expansion makes it adaptable to various network architectures.
Typical deployment scenarios include small to medium business network cores where fiber backbone connections are needed between floors or buildings, educational institutions requiring both classroom copper connections and fiber links between buildings, and industrial environments where fiber's immunity to electromagnetic interference is advantageous.
Mixed Media Network Core
Deploy as a core switch in environments with existing copper infrastructure that require fiber uplinks to other switches or to servers. The combo ports handle local copper connections while SFP slots manage fiber backbone links.
Fiber Distribution Point
Use as a distribution switch in fiber-rich environments, with SFP modules connecting to multiple endpoints over fiber optic cable while maintaining management capabilities for the entire segment.
Physical Profile
The switch features a standard 1U rack-mountable design measuring 1.73 inches in height, 17.40 inches in width, and 8.30 inches in depth. This compact form factor fits standard 19-inch equipment racks while providing adequate ventilation and cable management space.
Weighing approximately 6.80 pounds, the switch includes adhesive rubber feet for optional desktop placement and comes with a terminal block for secure power connection in rack environments.
- Width
- 17.40" (441.96 mm)
- Depth
- 8.30" (210.82 mm)
- Height
- 1.73" (43.94 mm)
- Weight
- 6.80 lb (3084.43 g)
What's in the Box
The package includes all necessary components for immediate deployment and installation.
Highlights
- 4 Gigabit Ethernet TP/SFP combo ports for flexible copper or fiber connections
- 20 dedicated SFP expansion slots for high-density fiber deployment
- Layer 2 managed switching with comprehensive feature set
- Rack-mountable 1U form factor for professional installation
- Supports both Gigabit Ethernet and 10 Gigabit Ethernet technologies
- 38.64W typical power consumption for energy-efficient operation
- Includes adhesive rubber feet for optional desktop placement
- TAA compliant and manufactured in Taiwan
Specifications
| Specifications | |
|---|---|
| Manufacturer | Black Box Corporation |
| Manufacturer Part Number | LGB5124A-R2 |
| Brand Name | Black Box |
| Product Series | LGB5100 |
| Product Model | LGB5124A-R2 |
| Product Name | SFP Gigabit Managed Fiber Switch - 24-Port |
| Product Type | Ethernet Switch |
| Interfaces/Ports | |
| Total Number of Network Ports | 4 |
| Network (RJ-45) | Yes |
| Uplink Port | Yes |
| Modular | Yes |
| Port/Expansion Slot Details | 4 x Gigabit Ethernet TP/SFP Combo |
| Media & Performance | |
| Media Type Supported | Twisted Pair,Optical Fiber |
| Ethernet Technology | Gigabit Ethernet,10 Gigabit Ethernet |
| Network Technology | 1000Base-X,10/100/1000Base-T,10GBase-X |
| I/O Expansions | |
| Total Number of Expansion Slots | 20.0 |
| Expansion Slot Type | SFP |
| Shared SFP Slot | Yes |
| Number of SFP Slots | 20 |
| Network & Communication | |
| Layer Supported | 2 |
| Networking Standards | IEEE 802.3ad,IEEE 802.1D,IEEE 802.1w,IEEE 802.1s,IEEE 802.1Q,IEEE 802.1x,IEEE 802.1p,IEEE 802.1ab,IEEE 802.1ag,IEEE 802.3u,IEEE 802.3x,IEEE 802.3ae,IEEE 802.3ah,IEEE 802.3ag |
| Management & Protocols | |
| Manageable | Yes |
| Power Description | |
| Power Source | Power Supply |
| Power Consumption | 38.64 W |
| Physical Characteristics | |
| Form Factor | Rack-mountable |
| Height | 1.73" (43.94 mm) |
| Width | 17.40" (441.96 mm) |
| Depth | 8.30" (210.82 mm) |
| Weight (Approximate) | 6.80 lb (3084.43 g) |
| Miscellaneous | |
| Package Contents | SFP Gigabit Managed Fiber Switch - 24-Port AC Power Cord 1 x Terminal Block 4 x Adhesive Rubber Feet 1 x Quick Installation Guide |
| Environmentally Friendly | Yes |
| Country of Origin | Taiwan |
| TAA Compliant | Yes |
| Warranty | |
| Limited Warranty | 1 Year |
User Manual
FAQ
How many network ports does this switch have?
The Black Box LGB5124A-R2 has four network ports. Each port is a Gigabit Ethernet TP/SFP combo port, meaning it can accept either a standard RJ-45 twisted pair connection or an SFP fiber optic module. This provides flexibility in choosing the appropriate media type for each connection based on distance, environment, and performance requirements.
What is the purpose of the 20 SFP slots?
The twenty SFP expansion slots allow for additional fiber optic connections beyond the four combo ports. These slots accept Small Form-factor Pluggable (SFP) transceiver modules, enabling the switch to connect to fiber optic networks. This expansion capacity is particularly useful for creating fiber backbone links, connecting to remote switches over longer distances, or deploying in environments where fiber's immunity to electromagnetic interference is beneficial.
Is this a managed or unmanaged switch?
This is a fully managed Layer 2 switch. Managed switches provide network administrators with control over configuration, monitoring, and optimization features. The LGB5124A-R2 supports standard management protocols and includes features such as VLAN support, link aggregation, port mirroring, and spanning tree protocol, allowing for sophisticated network segmentation and traffic management.
Can this switch be rack-mounted?
Yes, the switch is designed for rack mounting with a standard 1U form factor. It measures 1.73 inches in height, 17.40 inches in width, and 8.30 inches in depth, fitting standard 19-inch equipment racks. The package includes adhesive rubber feet for those who prefer desktop placement, but the primary deployment method is rack mounting for professional installations.
What types of cables does this switch support?
The switch supports both twisted pair copper cables and optical fiber cables. The four combo ports accept standard Category 5e/6/6a twisted pair cables with RJ-45 connectors for copper connections, while all ports (combo and SFP slots) support fiber optic connections through appropriate SFP modules. This dual-media support allows network designers to choose the optimal cable type for each connection based on distance, bandwidth requirements, and environmental factors.
What is the power consumption of this switch?
The switch has a typical power consumption of 38.64 watts. This relatively low power draw makes it suitable for environments where energy efficiency is a consideration. The built-in power supply ensures stable operation, and the switch includes a terminal block for secure power connection in rack deployments. The power consumption may vary slightly based on the number and type of SFP modules installed and network traffic levels.
| Qty | Price | Available |
|---|
