MikroTik SFP S-31DLC20D 1.25G Single Mode SFP Module (20KM)

The MikroTik SFP S-31DLC20D is a high-performance 1.25Gbps Single Mode SFP transceiver designed to deliver reliable and stable fiber optic connectivity over long distances. Supporting transmission distances of up to 20 kilometers, this SFP module is ideal for enterprise networks, ISPs, campus environments, surveillance systems, and business fiber backbone deployments.

Engineered with a 1310nm optical wavelength, Dual LC connectors, and Digital Diagnostic Monitoring (DDM) support, the S-31DLC20D provides exceptional network performance while allowing administrators to monitor important operating parameters such as temperature, voltage, transmit power, and receive power in real time.

Whether you are upgrading an existing fiber network or building a new infrastructure, the MikroTik SFP S-31DLC20D offers an affordable and dependable solution for long-distance Gigabit fiber communication.

Why Choose the MikroTik SFP S-31DLC20D?

Reliable fiber communication is essential for modern networking. The MikroTik SFP S-31DLC20D is specifically designed to provide consistent Gigabit connectivity across long-distance Single Mode fiber installations.

Its compact SFP form factor allows for easy installation into compatible switches, routers, media converters, and network appliances without requiring complicated configuration.

With genuine MikroTik quality, this transceiver ensures dependable performance for mission-critical business environments.

High-Speed 1.25Gbps Fiber Connectivity

Designed for Gigabit Ethernet applications, the SFP S-31DLC20D supports 1.25Gbps data transmission, making it suitable for:

• Enterprise LANs
• Fiber backbone connections
• Internet Service Providers (ISPs)
• Metropolitan Area Networks (MAN)
• CCTV fiber transmission
• Data centers
• Government institutions
• Educational campuses

Its stable optical performance minimizes packet loss while maintaining fast data transfer speeds.

Long-Distance Transmission up to 20KM

One of the biggest advantages of the MikroTik SFP S-31DLC20D is its ability to transmit data over distances of up to 20 kilometers using Single Mode Fiber (SMF).

This makes it ideal for connecting:

• Multiple office buildings
• Factory networks
• School campuses
• Hospitals
• Remote communication sites
• Outdoor networking infrastructure

Long-distance capability reduces the need for intermediate networking equipment, lowering deployment costs.

1310nm Optical Wavelength

The module operates at a 1310nm wavelength, a widely adopted standard for Single Mode fiber communications.

Benefits include:

• Excellent signal stability
• Low optical attenuation
• Reliable long-distance communication
• Reduced transmission errors
• Improved overall network efficiency

Dual LC Connector Design

The MikroTik SFP S-31DLC20D features a Dual LC optical interface, providing secure and efficient fiber connectivity.

Advantages include:

• Easy installation
• Reliable fiber connections
• Compact connector size
• High optical performance
• Compatibility with standard Single Mode fiber patch cords

The Dual LC design has become the preferred choice for professional networking environments.

Digital Diagnostic Monitoring (DDM)

A major feature of this SFP module is its support for Digital Diagnostic Monitoring (DDM).

DDM enables network administrators to monitor critical operational parameters including:

• Module temperature
• Supply voltage
• Laser bias current
• Optical transmit power
• Optical receive power

This proactive monitoring helps identify potential issues before they affect network performance, reducing downtime and simplifying maintenance.

Broad Device Compatibility

The MikroTik SFP S-31DLC20D has been extensively tested with several MikroTik networking devices, including:

• RB260GS
• RB2011LS
• RB2011LS-IN
• RB2011UAS-IN
• RB2011UAS-RM
• RB2011UAS-2HnD
• RB2011UAS-2HnD-IN
• CCR1036-12G-4S

In addition, the module is also compatible with many non-MikroTik SFP-enabled networking devices, making it a flexible choice for mixed-vendor network environments.

Easy Installation

Installing the SFP S-31DLC20D is quick and straightforward.

Simply insert the module into any compatible SFP port, connect your Single Mode LC fiber cable, and the transceiver is ready for operation.

Its hot-swappable design allows replacement without powering down supported equipment, reducing maintenance interruptions.

Ideal Applications

The MikroTik SFP S-31DLC20D is suitable for numerous networking applications, including:

• Enterprise fiber networks
• Internet Service Providers
• Corporate offices
• Data centers
• Government institutions
• Universities and schools
• CCTV surveillance systems
• Hospital networking
• Industrial communication
• Building-to-building fiber links

Key Features

• Genuine MikroTik SFP optical transceiver
• Supports 1.25Gbps Gigabit Ethernet
• Up to 20KM transmission distance
• Designed for Single Mode Fiber (SMF)
• Operates at 1310nm wavelength
• Dual LC optical connector
• Digital Diagnostic Monitoring (DDM) support
• Stable and reliable optical communication
• Hot-swappable SFP module
• Low power consumption
• Compact Small Form-factor Pluggable (SFP)
• Excellent signal integrity
• Ideal for enterprise and ISP deployments
• Tested with multiple MikroTik RouterBOARD devices
• Compatible with many non-MikroTik SFP devices
• High-quality optical components
• Durable and dependable design
• Easy plug-and-play installation

Technical Specifications

Optical Specifications

• Product Model: S-31DLC20D
• Product Type: SFP Optical Transceiver
• Data Rate: 1.25Gbps
• Fiber Type: Single Mode Fiber (SMF)
• Maximum Distance: 20KM
• Optical Wavelength: 1310nm
• Connector Type: Dual LC
• Monitoring: Digital Diagnostic Monitoring (DDM)
• Form Factor: SFP
• Hot Swappable: Yes

Why Buy from Neriahtech Computers?

At Neriahtech Computers, we supply genuine MikroTik networking equipment backed by professional customer support and competitive pricing. Whether you are upgrading an existing fiber network or deploying a new infrastructure, our team is ready to help you choose the right networking solutions for your business.

Contact Us

Neriahtech Computers

• Phone/WhatsApp: +254 113 81 81 82
• Email: neriahtechcomputers@gmail.com
• Website: https://neriahtechcomputers.co.ke/

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Conclusion

The MikroTik SFP S-31DLC20D 1.25G Single Mode SFP Module is a dependable and cost-effective fiber optic transceiver built for long-distance Gigabit networking. With support for 20KM Single Mode transmission, a 1310nm optical wavelength, Dual LC connectivity, and Digital Diagnostic Monitoring (DDM), it delivers the performance and reliability required for professional network deployments. Its broad compatibility with MikroTik RouterBOARD devices and many third-party SFP-enabled products makes it an excellent investment for businesses, ISPs, educational institutions, and data centers seeking stable, high-speed fiber connectivity.