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LS-SM311G-40C 1.25g sfp 1310nm 40km duplex lc dom smf optical transceiver module
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LINK-PP LS-SM311G-40C 1.25G SFP 1310nm 40km Duplex LC DOM SMF Optical Transceiver Module

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Product summary

Product
LINK-PP LS-SM311G-40C 1.25G SFP 1310nm 40km Duplex LC DOM SMF Optical Transceiver Module
SKU
183242
P/N
LS-SM311G-40C
Price
$ 11
Stock
890 in Stock
Sold
1.2K
For Order Over $1000 Get $15.00 Off , Code: Linkpp15
For Order Over $3000 Get $50.00 Off , Code: Linkpp50
For Order Over $5000 Get $100.00 Off , Code: Linkpp100
New Users: $10 Coupon for Orders , Code: linkpp2610
39 Reviews
3 Questions
1.2K Sold
Shipping:
Free Shipping
to United States via FedEx
Estimated delivery time : 3 - 10 days.
5-Year Warranty 30-Day Returns 30-Day Exchange
Warranty
  • Providing industry-leading 5-year warranty.
  • Read the table for details of all products' warranty.
Returns & Exchange
  • Refunds will be received about 5 business days after the receipt of returned items.
  • Items in stock for replacement can be shipped within 1 business day.
  • Read the full return policy for details.
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LINK-PP LS-SM311G-40C 1.25G SFP Specifications

The LINK-PP LS-SM311G-40C is a commercial-grade 1.25G SFP optical transceiver designed for Gigabit Ethernet applications. Operating at 1310nm over single-mode fiber, it supports transmission distances up to 40km through a duplex LC interface. The module features low power consumption, hot-pluggable design, and integrated DOM functionality for enhanced network visibility and management.

LINK-PP Part Number LS-SM311G-40C Vendor Name LINK-PP
Form Factor SFP Max Data Rate 1.25Gbps
Wavelength 1310nm Max Cable Distance 40km
Connector Duplex LC Media SMF
Transmitter Type DFB Receiver Type

PIN

TX Power -5 to 0dBm RX Power -23 to -1dBm
Receiver Sensitivity <-23dBm DOM Support Yes
Operating Temperature Range 0 to 70°C Protocols

SFF-8472 MSA Compliant, IEEE 802.3ah-2004

Key Features of LINK-PP LS-SM311G-40C 1.25G SFP

The LS-SM311G-40C delivers stable 1.25Gbps data transmission over distances up to 40km. Key features include a 1310nm DFB laser, duplex LC connector, single-mode fiber support, Digital Optical Monitoring, hot-swappable SFP form factor, and broad compatibility with Gigabit Ethernet networking equipment.

LINK-PP LS-SM311G-40C 1.25G SFP Optical Module

Designed for reliable Gigabit optical networking, the LS-SM311G-40C combines proven optical technology with industry-standard SFP packaging. It enables cost-effective long-distance fiber connectivity while maintaining stable signal integrity and operational efficiency.

LS-SM311G-40C: 1.25G Connectivity for Data Center Interconnect (DCI)

The LS-SM311G-40C provides dependable 1.25G connectivity for data center interconnect, enterprise backbone, and metro access applications. Its long-reach optical design supports stable communication between geographically separated network locations.

LS-SM311G-40C Module with 1310nm Wavelength

Operating at a 1310nm wavelength, the LS-SM311G-40C achieves efficient optical transmission over single-mode fiber. This wavelength is widely adopted for Gigabit Ethernet deployments requiring reliable performance and minimized signal attenuation.

LS-SM311G-40C Module Supporting 40km Transmission

Supporting transmission distances up to 40km, the LS-SM311G-40C is ideal for long-range network connections. Its optimized optical budget helps maintain consistent performance across extended fiber links and remote infrastructure deployments.

LS-SM311G-40C Module with Duplex LC Interface

The duplex LC connector design provides separate transmit and receive channels for stable bidirectional communication. This industry-standard interface simplifies installation and ensures compatibility with existing fiber optic cabling systems.

LS-SM311G-40C Module with DOM for Real-Time Monitoring

Integrated Digital Optical Monitoring enables real-time tracking of temperature, voltage, transmit power, receive power, and laser bias current. This functionality simplifies network diagnostics, preventive maintenance, and performance optimization.


LINK-PP LS-SM311G-40C 1.25G SFP Certification

The LS-SM311G-40C is manufactured in compliance with recognized industry standards and optical communication specifications, ensuring dependable operation, product consistency, and long-term network reliability across diverse deployment environments.

Optical Transceivers Testing

Each LS-SM311G-40C undergoes comprehensive production testing, including optical, electrical, environmental, and compatibility verification procedures to ensure consistent quality and dependable field performance.

LS-SM311G-40C Quality Certifications

The module is produced under certified quality management systems and complies with major international regulatory and environmental requirements for optical communication products and networking equipment.

LS-SM311G-40C Certified for Reliable Host-Device Compatibility

Compatibility validation is conducted with multiple switches, routers, and networking platforms to ensure stable operation, seamless integration, and reliable communication across supported host devices.


Rigorous Testing Ensures Reliable SFP Performance

Comprehensive testing procedures verify optical stability, signal integrity, environmental durability, and interoperability before every module is approved for shipment.

Optical

Optical Spectrum Test

Verifies wavelength accuracy and optical signal stability.

Optical

Eye Pattern Test

Evaluates signal quality and transmission integrity performance.

Optical

Bit Error Rate Test

Confirms reliable data transmission with minimal errors.

Optical

Temperature Test

Validates stable operation across specified temperature ranges.


Product Shipping for LINK-PP LS-SM311G-40C 1.25G SFP

Every module is carefully packaged and inspected before shipment to ensure product integrity, transportation safety, and timely delivery to customers worldwide.

Anti-Static Protective Packaging

Anti-Static Protective Packaging

Protected with anti-static materials for enhanced safety.

Shock-Resistant Transport Protection

Shock-Resistant Transport Protection

Secure cushioning minimizes vibration and transport damage.

Fast Order Processing and Dispatch

Fast Order Processing and Dispatch

Efficient fulfillment supports rapid shipment scheduling.

Global Logistics and International Delivery

Global Logistics and International Delivery

Worldwide shipping services support international deployment needs.

LINK-PP LS-SM311G-40C 1.25G SFP Usage Demonstration

The LS-SM311G-40C can be deployed in Gigabit Ethernet switches, routers, enterprise networks, metro access systems, and data center environments. Its 40km reach and single-mode fiber support make it suitable for long-distance optical communication applications requiring dependable connectivity.

LS-SM311G-40C Technical Support

LINK-PP provides professional technical support, including pre-sales consultation, compatibility verification, and post-deployment troubleshooting to ensure smooth network operation.

Pre-Sales Technical Consultation

Pre-Sales Technical Consultation

Professional technical guidance to help customers select the most suitable LS-SM311G-40C modules based on network architecture and application requirements.

Compatibility Verification Support

Compatibility Verification Support

Compatibility checks and validation to ensure seamless operation with Cisco switches and other supported networking platforms.

Deployment & Installation Assistance

Deployment & Installation Assistance

Step-by-step support for installation, configuration, and initial deployment to ensure stable and correct operation.

Long-Term Technical Assurance

Long-Term Technical Assurance

Ongoing technical support throughout the product lifecycle to ensure reliable performance in enterprise and carrier-grade networks.

LINK-PP LS-SM311G-40C 1.25G SFP After-Sales Assurance

LINK-PP provides after-sales support for the smooth deployment and reliable operation of the optical modules.

15 days

15-day no-reason return and refund

Free maintenance or replacement

Free replacement for dead-on-arrival (DOA) or defective items within the initial period

Free maintenance

 Free repair services for manufacturing defects throughout the warranty period

Limitations

Warranty exclusions and conditions apply

Model Comparison Table

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A***s
Turkey
Verified Purchase
5 .0
2026-04-30
Flawless 1.25G SFP performance out of the box.
S***r
Canada
Verified Purchase
5 .0
2026-03-02
Perfect SMF module for my home lab!
P***h
Switzerland
Verified Purchase
5 .0
2026-02-28
Solid duplex LC connectors, snapped right in.
C***z
Sweden
Verified Purchase
5 .0
2026-02-24
As a network engineer, I highly recommend the LS-SM311G-40C for data center mass deployment. The DOM integration via IEEE 802.3ah-2004 protocol provides crucial real-time monitoring for voltage and laser bias.
M***z
Saudi Arabia
Verified Purchase
5 .0
2026-02-15
Tested with D-Link and Netgear switches, no compatibility warnings and steady Gigabit speeds.
D***s
Belgium
Verified Purchase
5 .0
2026-01-15
Plug and play with our Ubiquiti gear (❁´◡`❁)
D***n
Mexico
Verified Purchase
5 .0
2025-12-07
Insane value for mass data center deployment!
E***n
Colombia
Verified Purchase
5 .0
2025-12-01
Using this 1.25G module alongside my home 10G NAS setup, absolutely stable throughput.
E***r
Costa Rica
Verified Purchase
5 .0
2025-10-14
Upgraded our enterprise backbone using these Duplex LC optical modules. Hooked them up across various Arista and HPE switches for compatibility testing, and they negotiated to 1.25Gbps instantly without any manual configuration.
M***s
Ecuador
Verified Purchase
5 .0
2025-09-27
Best 1310nm DFB optical transceiver I've tested. ⚙️
K***n
Morocco
Verified Purchase
5 .0
2025-09-19
Solved our campus fiber link issues instantly!
D***n
Brazil
Verified Purchase
5 .0
2025-08-28
I bought a batch for our outdoor networking enclosures. Even though it's a 0-70C commercial part, it survived our summer heatwave beautifully while passing campus optical networking traffic with zero CRC errors.
D***n
Austria
Verified Purchase
5 .0
2025-06-12
DOM feature works great on MikroTik switches.
N***n
Venezuela
Verified Purchase
5 .0
2025-06-01
Fast shipping, works perfectly with Cisco routers.
B***s
Macao
Verified Purchase
5 .0
2025-05-31
Awesome alternative to pricey name brands, SFF-8472 MSA compliant just as advertised! (ง •_•)ง
P***s
Argentina
Verified Purchase
4 .0
2025-03-22
Great 1310nm transceivers for our base station backhaul, delivery took a day longer than expected.
S***l
Chile
Verified Purchase
5 .0
2025-03-18
Deployed 50 of these LS-SM311G-40C for a school district, excellent OEM compatibility overall.
M***g
Sweden
Verified Purchase
5 .0
2025-03-14
Got these for outdoor cabinets; signal stays crisp over single-mode fiber despite the weather.
C***n
Belgium
Verified Purchase
5 .0
2025-03-13
We tested the TX/RX power levels using an optical meter, and this 1310nm transceiver is dead-on at -5dBm. Flawlessly bridges our remote base station backhaul over 35km of single-mode fiber.
E***l
Switzerland
Verified Purchase
5 .0
2025-02-20
Reliable 40km long-haul connection, zero packet loss. ✨
S***s
Switzerland
Verified Purchase
5 .0
2024-10-31
The 40km transmission distance is legit, holding a solid link between two city buildings.
B***r
Philippines
Verified Purchase
5 .0
2024-08-18
Quick and easy ordering process..best price i found online for this item!
M***e
Singapore
Verified Purchase
5 .0
2024-07-23
The winter in my city is particularly cold, so I always worried about the temperature is too low for the ethernet module to work in, which might result in the paralysis of the entire computer room. However, the modules bought from l-p.com works fine in the low temperatures environment. Never need to worry about the temperature which could influence the ethernet module performance. l-p.com, good choice!
J***d
Australia
Verified Purchase
5 .0
2024-07-20
The shopping experience is amazing. The Account Manager is so nice and considerate. She helped a lot during the purchaing.Even after I placed my order, she contuined to send emails to inform me about the logistic.
I***o
Philippines
Verified Purchase
5 .0
2024-05-10
Nice webpage layout & selection. Good customer service when I called about items. No pressure.
b***r
United States
Verified Purchase
5 .0
2024-03-24
Great product for the price. Can afford to have a spare for the price.
D***a
United States
Verified Purchase
5 .0
2024-02-24
Although spent a little time finding what I need, order came quickly and worked well.
W***s
Poland
Verified Purchase
5 .0
2023-12-20
Reliable. High-Performing. Cost-effective. What's not to like?
J***n
Iran, Islamic Republic of
Verified Purchase
5 .0
2023-11-22
top , Fast shipping , works perfectly
G***d
India
Verified Purchase
5 .0
2023-10-16
can't wait to get it
N***e
Hong Kong
Verified Purchase
5 .0
2023-10-09
I am a little guy but treated as a big fish. prompt notification quick delivery and save lot cash!!!
A***r
Philippines
Verified Purchase
5 .0
2023-10-07
10/25/40G Transceiver Modules Female works well on my switches and I would get some more soon.
I***n
Mexico
Verified Purchase
5 .0
2023-10-02
The item works well with our systems and was easy to order and Fast delivery as promised.
M***o
Bulgaria
Verified Purchase
5 .0
2023-05-21
Packaged very well. Arrived on time. No issues. Great purchase. Completely satisfied.
S***i
United States
Verified Purchase
5 .0
2023-04-18
Great Company
M***s
United Arab Emirates
Verified Purchase
5 .0
2023-04-02
No complaints out of me... keep up the good work LINK-PP.
E***e
Belgium
Verified Purchase
5 .0
2023-02-17
The seller at l-p.com was wonderful to work with, the website is easy to use and made us comfortable choosing fiber modules online, and we would absolutely go again.
J***n
Israel
Verified Purchase
5 .0
2023-01-22
I have always had good experiences with LINK-PP team.
P***y
Democratic People's Republic of Korea
Verified Purchase
5 .0
2023-01-05
The installation was extremely easy. Thank you.
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