The SFP MODULE 1.25G 40KM 1310+1550 LC SINGLE MODE (PAIR) is a high-performance optical transceiver designed for reliable long-distance single-mode fiber communication. With a data rate of 1.25G, this module supports transmission over distances of up to 40 kilometers. It utilizes dual wavelengths of 1310nm and 1550nm, providing enhanced data integrity and stable performance. The module comes with LC connectors for secure, easy installation. This SFP module is ideal for applications in telecommunications, networking, and data centers, offering excellent signal quality and long-range communication capabilities.
SFP Module 1.25G 40KM 1310+1550 LC Single Mode (Pair) – NETLINK
Reliable, Long-Distance BiDi Optical Transceivers for Modern Fiber Networks
The NETLINK SFP Module 1.25G 40KM 1310+1550 LC Single Mode (Pair) is a high-performance optical transceiver solution designed for seamless data transmission over long distances. Built to meet the demands of modern telecommunications, ISP backbones, enterprise networks, and FTTH deployments, this SFP module pair delivers 1.25Gbps bidirectional communication over a single strand of single-mode fiber (SMF) with a reach of up to 40 kilometers.
Utilizing Wavelength Division Multiplexing (WDM) technology, these modules allow transmission and reception on different wavelengths (1310nm and 1550nm), offering an efficient and cost-saving solution that eliminates the need for dual fiber links.
Advanced BiDi WDM Technology for Single-Fiber Links
Each module in this pair is engineered to work in tandem using complementary wavelengths—one transmits at 1310nm and receives at 1550nm, while the other transmits at 1550nm and receives at 1310nm. This BiDi (Bidirectional) transmission model enables full-duplex communication over a single optical fiber, optimizing fiber usage and reducing deployment costs by 50%.
This makes the NETLINK SFP 1.25G 40KM pair an ideal choice for:
FTTH / FTTB projects
Campus and enterprise network interconnects
Metro Ethernet links
ISP backbone expansions
Remote site connectivity
High-Speed Data Transmission
These SFP modules support a 1.25Gbps data rate, ideal for Gigabit Ethernet, Fiber Channel, and other bandwidth-intensive applications. Whether used in switches, routers, media converters, or OLT/ONT systems, the modules ensure consistent performance and low latency across long distances.
This allows users to achieve fast, stable, and secure network connectivity—critical for both business operations and customer services in telecom and ISP sectors.
Compact LC Connector Interface
Equipped with LC (Lucent Connector) duplex interfaces, these modules are perfectly suited for high-density networking environments. The LC connector is smaller and more precise than older SC connectors, helping minimize signal loss and maintain a strong connection in fiber links.
Its compact design also makes it ideal for equipment racks with limited space, allowing for better cable management and streamlined installations.
Hot-Pluggable & MSA Compliant
NETLINK’s 1.25G SFP modules are fully hot-pluggable, allowing network engineers to install or replace them without powering down the host device. They conform to the SFP MSA (Multi-Source Agreement) standards, ensuring compatibility with a wide range of networking equipment from various OEMs.
This flexibility enables smooth integration into existing infrastructures, minimizing deployment time and simplifying system upgrades or replacements.
Digital Diagnostic Monitoring (DDM)
For enhanced network management, these modules feature Digital Diagnostic Monitoring (DDM), which provides real-time access to key operating parameters such as:
Optical power output and input
Supply voltage
Module temperature
Laser bias current
This functionality empowers administrators with better visibility into network performance, helping them proactively detect faults, perform preventative maintenance, and ensure high service availability.
Robust Build & Energy Efficiency
Built with durable materials and housed in EMI-shielded metal casings, these SFP modules are designed for stability and protection in harsh environments. They operate within a wide temperature range, typically -10°C to +70°C, and offer low power consumption, which helps reduce energy costs and maintain consistent thermal performance in high-density deployments.
Key Features:
Data Rate: 1.25Gbps
Transmission Distance: Up to 40KM
Wavelengths: 1310nm TX / 1550nm RX and vice versa
Connector: LC Duplex
WDM BiDi design for single-fiber communication
Digital Diagnostic Monitoring (DDM)
Hot-pluggable design
MSA compliant and widely compatible
Low power consumption
EMI-shielded metal housing for enhanced durability
Applications:
FTTH (Fiber to the Home)
Long-distance point-to-point links
Campus area networks
Data center interconnects
ISP and telecom transmission lines
Government and enterprise network backbones
Conclusion
The NETLINK SFP Module 1.25G 40KM 1310+1550 LC Single Mode (Pair) is a reliable, efficient, and space-saving solution for high-speed fiber optic communication over long distances. Its WDM BiDi functionality, durable design, and advanced diagnostic features make it a top choice for network professionals seeking to expand or optimize their fiber networks while reducing operational costs. Whether you’re an ISP, telecom provider, or enterprise, this SFP module pair offers the perfect balance of performance, efficiency, and value.
