FS S3900-24F4S, 24-Port Gigabit Ethernet L2+ Switch, 20 x 1Gb SFP, 4 x Gb RJ45

  • Model: FS S3900‑24F4S

  • Product Type: Managed Gigabit Ethernet Switch (Layer 2+)

  • Operating System: FSOS

  • Switch Chip: Broadcom BCM56151

  • Switching Capacity: 128 Gbps

  • Forwarding Rate: 95 Mpps

  • 20 × 1 Gb SFP fiber ports

  • 4 × Gigabit RJ45/SFP combo ports (one active per combo)

  • 4 × 10 Gb SFP+ uplink ports

  • 1 × Console port

  • 1 × Management port

  • Layer‑2+ functions: VLANs, link aggregation (LACP), ERPS, STP/RSTP/MSTP

  • QoS & traffic management

  • Security: ACLs, SSH, 802.1X, RADIUS, TACACS+

  • Management: CLI, Web GUI, SNMP (v1/v2/v3)

  • Stacking: Up to 6 units (same model)

  • Power: Dual built‑in redundant AC power supplies

  • Cooling: Smart fans

  • Packet Buffer: ~1.5 MB

  • MAC Address Table: ~16K

  • Operating Temperature: 0 °C to 45 °C

  • MTBF: >100,000 hours

  • Jumbo Frame Support: Up to 9 KB

  • Dimensions: Approx. 44 × 440 × 280 mm

  • Weight: ~4.27 kg

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Description

FS S3900‑24F4S — 24‑Port Gigabit Ethernet L2+ Managed Switch | Lansotech Solutions Nairobi, Kenya

At Lansotech Solutions, a trusted provider of professional networking equipment and enterprise‑grade solutions in Nairobi, Kenya, we understand that businesses require high performance, scalability, and reliability in every layer of their network. Therefore, we are pleased to present the FS S3900‑24F4S — a 24‑port Gigabit Ethernet Layer 2+ managed switch that delivers flexible connectivity, advanced management features, and future‑ready uplinks for modern network environments.

Because this model combines high port density, powerful hardware, and rich Layer‑2+ capabilities, it’s an option worth considering when you need to build or upgrade your enterprise network, campus infrastructure, or SMB connectivity — especially when paired with the local expertise, competitive pricing, and professional support that Lansotech Solutions offers.


Overview: What Is the FS S3900‑24F4S?

The FS S3900‑24F4S is a Layer 2+ managed Gigabit switch designed for access and aggregation roles in business networks. Specifically, it provides:

20 × 1 Gb SFP fiber ports for high‑speed uplinks and fiber connectivity
4 × Gigabit RJ45/SFP combo ports for flexible copper or fiber connections
4 × 10 Gb SFP+ uplink ports for high‑bandwidth backbone links
128 Gbps switching capacity and 95 Mpps forwarding rate for smooth traffic handling

Consequently, this configuration makes the S3900‑24F4S ideal for environments where fiber connectivity and high uplink throughput are priorities — such as enterprise branches, ISP access layers, data centres, and campus networks.


Why You Should Consider the FS S3900‑24F4S (and Why Lansotech Solutions Is the Best Option)

When choosing a managed switch for demanding network environments, it’s important to select hardware that delivers performance, flexibility, and growth potential. Therefore, here’s why the FS S3900‑24F4S should be on your shortlist:

Flexible Fiber and Gigabit Connectivity

Firstly, the combination of 20 SFP fiber ports and 4 RJ45/SFP combo ports gives you plenty of options to connect servers, access points, uplinks, and remote segments — with high‑speed fiber options where needed.

High‑Speed Uplinks for Backbone Links

In addition, the 4 × 10 Gb SFP+ uplink ports enable direct high‑capacity connections to core switches, routers, servers, or other aggregation points — helping eliminate bottlenecks as your network grows.

Advanced Layer‑2+ Feature Set

Moreover, rich Layer‑2+ functions such as VLANs, link aggregation (LACP), QoS, ERPS, ACLs, and SNMP management help organisations optimise traffic, enhance performance and increase security across the network.

Stackability and Redundancy

Furthermore, this switch supports stacking up to six units (of the same model) to simplify management and scale port density without complicating topology.

Robust Hardware and Reliability

Also, with a Broadcom chip foundation, dual redundant power supplies, smart cooling, and high MTBF (mean time between failures), the S3900 series is built for 24/7 operation in enterprise and carrier environments.

Why Lansotech Solutions Is Your Best Choice

Finally, when you source your FS S3900‑24F4S from Lansotech Solutions, you benefit from authentic hardware, competitive local pricing, expert pre‑sales consultation, installation support, and post‑delivery technical assistance in Nairobi and across Kenya — making us the best partner for your network infrastructure needs.


Use Cases: Where the FS S3900‑24F4S Excels

Enterprise Branch & Campus Aggregation
Connect multiple access switches and extend high‑capacity uplinks to your core network.

ISP Access Layer Backbones
Use fiber connectivity and high uplinks to serve customers with reliable, high‑speed links.

Data Centres & Server Farms
Provide aggregation for servers, storage, and inter‑rack connections with high bandwidth and low latency.

Large Office & Multi‑Site Networks
Combine dense port options with advanced management to support wireless, VoIP, and video traffic.

Conclusion

In conclusion, the FS S3900‑24F4S is a feature‑rich, high‑performance Layer 2+ managed switch that delivers flexible fiber and copper connectivity, high‑capacity uplinks, and advanced network controls — perfect for enterprise networks, ISP infrastructure, multi‑site deployments, and campus environments.

Moreover, its combination of port density, uplink options, stackability, and robust hardware makes it a strong option to consider when planning your network upgrade or expansion. Above all, Lansotech Solutions offers the local support, competitive pricing, and professional services that help you achieve a successful, resilient network deployment in Nairobi and beyond.

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