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The LINK-PP LS-SM311G-20I is a high-performance, industrial-grade 1.25G SFP optical transceiver designed for dependable gigabit networks. It operates at a 1310nm wavelength over single-mode fiber, achieving transmissions up to 20km via a duplex LC connector. Supporting DOM, this module delivers robust connectivity across extreme temperatures ranging from -40°C to 85°C.
| LINK-PP Part Number | LS-SM311G-20I | Vendor Name | LINK-PP |
| Form Factor | SFP | Max Data Rate | 1.25Gbps |
| Wavelength | 1310nm | Max Cable Distance | 20km |
| Connector | Duplex LC | Media | SMF |
| Transmitter Type | FP | Receiver Type |
PIN |
| TX Power | -9 to 0dBm | RX Power | -23 to -1dBm |
| Receiver Sensitivity | -23dBm | DOM Support | Yes |
| Operating Temperature Range | -40 to 85°C | Protocols |
SFF-8472 MSA Compliant, IEEE 802.3ah-2004, IEEE 802.3z |
This industrial-grade transceiver features 1.25Gbps throughput, a 1310nm FP laser, and a 20km reach over single-mode fiber. It provides an extended operating temperature range, dual LC connectors, digital optical monitoring support, hot-pluggable capability, and low power consumption for optimal network performance.
The LINK-PP LS-SM311G-20I is a hot-pluggable SFP optical module engineered for harsh industrial environments. It delivers stable 1.25Gbps data rates, ensuring efficient and uninterrupted optical communication across diverse networking platforms.
Boasting a fast 1.25Gbps data rate, the LS-SM311G-20I serves as an ideal backbone solution for enterprise local area networks. It effectively eliminates data bottlenecks, offering scalable bandwidth and high-speed data transmission.
Utilizing a precise 1310nm wavelength, this optical module optimizes signal integrity and minimizes attenuation. It is engineered to deliver reliable, high-performance laser transmission across single-mode fiber infrastructure for critical network links.
Designed for extended reach, this SFP transceiver supports long-distance data transmission up to 20km. It bridges remote network nodes without signal degradation, making it perfect for metropolitan and campus-wide deployments.
Equipped with an industry-standard duplex LC interface, this module guarantees secure, stable optical connections. Its compact connector design maximizes port density on switches and routers while simplifying fiber cable installation.
Featuring advanced Digital Optical Monitoring, the module tracks operational parameters in real time. Network administrators can easily monitor temperature, voltage, and laser power to ensure proactive system maintenance and reliability.
The LINK-PP LS-SM311G-20I undergoes strict certification to meet rigorous global standards. It complies fully with MSA guidelines, guaranteeing seamless integration and high operational safety in diverse networks.
Every transceiver undergoes a comprehensive quality testing program before leaving the factory. This rigorous process evaluates hardware durability and performance consistency under maximum workload conditions.
This SFP module holds premier quality certifications, including RoHS, CE, and FCC compliance. These credentials confirm that the product adheres to international safety and environmental regulations.
The module is comprehensively certified for broad host-device compatibility. It is guaranteed to work seamlessly with switches, routers, and servers from all major networking equipment brands.
Each industrial module undergoes comprehensive testing to verify peak performance, excellent signal quality, and unwavering operational reliability under heavy network traffic.
Advanced spectrum analysis measures precise central wavelength and spectral width to guarantee compliance.
Eye diagram testing evaluates transmitter signal quality, ensuring low jitter and clear optical waveforms.
This test evaluates data integrity, verifying error-free packet transmission across long physical distances.
Thermal stress testing verifies flawless operations under extreme conditions from -40°C to 85°C.
We utilize professional, multi-layered packaging and secure logistics networks to guarantee that your optical modules arrive safely and promptly worldwide.
Each transceiver is sealed inside an individual anti-static bag to prevent electrical damage.
Cushioned specialized boxes guard the delicate internal optics against mechanical shocks during transit.
Our streamlined warehouse system ensures quick processing and rapid dispatch of your orders.
We partner with top international carriers to provide fast, tracked global delivery services.
To deploy the module, insert it into a compatible SFP slot until it clicks securely. Connect the duplex LC single-mode fiber cables to bridge your network hardware, allowing immediate, automatic high-speed data transmission.
LINK-PP provides professional technical support, including pre-sales consultation, compatibility verification, and post-deployment troubleshooting to ensure smooth network operation.
Professional technical guidance to help customers select the most suitable LS-SM311G-20I modules based on network architecture and application requirements.
Compatibility checks and validation to ensure seamless operation with Cisco switches and other supported networking platforms.
Step-by-step support for installation, configuration, and initial deployment to ensure stable and correct operation.
Ongoing technical support throughout the product lifecycle to ensure reliable performance in enterprise and carrier-grade networks.
LINK-PP provides after-sales support for the smooth deployment and reliable operation of the optical modules.
15-day no-reason return and refund
Free replacement for dead-on-arrival (DOA) or defective items within the initial period
Free repair services for manufacturing defects throughout the warranty period
Warranty exclusions and conditions apply
Compatible | LINK-PP | LINK-PP | LINK-PP | LINK-PP | LINK-PP |
Data Rate (Max) | 1.25Gbps | 1.25Gbps | 1.25Gbps | 1.25Gbps | 1.25Gbps |
Wavelength | 1310nm | 1310nm | 850nm | 1310nm | 850nm |
Connector | Duplex LC | Duplex LC | Duplex LC | Duplex LC | Duplex LC |
Cable Distance (Max) | 20km | 2km | 2km | 2km | 2km |
Cable Type | SMF | MMF | MMF | MMF | MMF |
TX Power | -9 to 0dBm | -12 to -3dBm | -9 to 0dBm | -12 to -3dBm | -9 to 0dBm |
Receiver Sensitivity | -23dBm | -30dBm | -18dBm | -30dBm | -18dBm |
Operating Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C | 0 to 70°C | 0 to 70°C |
Form Factor | SFP | SFP | SFP | SFP | SFP |
Transmitter Type | FP | FP | VSCEL | FP | VSCEL |
Receiver Type | PIN | PIN | PIN | PIN | PIN |
DOM Support | Yes | Yes | Yes | Yes | |
Protocols | SFF-8472 MSA Compliant, IEEE 802.3ah-2004, IEEE 802.3z | SFF-8472 MSA IEEE 802.3 | IEEE 802.3z, SFF-8472, FC-PI, SFP MSA (INF-8074i) Compliant | SFF-8472 MSA IEEE 802.3 | IEEE 802.3z, SFF-8472, FC-PI, SFP MSA (INF-8074i) Compliant |
| Pictures | ID# | Description | Price | Stock | Add to Cart |
Q: Does this transceiver require single-mode or multi-mode fiber, and what connector does it use? By D***r on 2026-02-19
A: This specific module requires Single-Mode Fiber (SMF) to achieve its optimal transmission distance of up to 20km at a 1310nm wavelength. It features an industry-standard Duplex LC connector interface. By admin on 2026-02-19
Q: Is this unit fully compliant with standard gigabit ethernet protocols for our legacy setup? By P***s on 2026-02-12
A: Yes, it fully supports IEEE 802.3z and IEEE 802.3ah-2004 standards, alongside SFF-8472 for digital optical monitoring (DOM), ensuring perfect protocol adaptation with both legacy and modern gigabit Ethernet infrastructures. By admin on 2026-02-12
Q: Will these work with my Cisco catalyst switches without throwing any unsupported transceiver errors? By L***s on 2025-10-29
A: Yes! The LS-SM311G-20I is highly OEM compatible. It complies strictly with MSA standards and works seamlessly with Cisco, Juniper, and other multi-brand switches without triggering any error codes. By admin on 2025-10-29
Q: Can this module survive in an unventilated outdoor cabinet? Summers here get brutally hot. By W***z on 2025-10-09
A: Yes, it is a rugged industrial-grade transceiver. It supports extreme operating temperatures ranging from -40°C to 85°C (-40°F to 185°F), making it perfect for harsh outdoor environments, smart city nodes, and base station deployments. By admin on 2025-10-09
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