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LS-SM311G-02I 1.25g sfp 1310nm 2km duplex lc dom smf optical transceiver module (industrial)
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LINK-PP LS-SM311G-02I 1.25G SFP 1310nm 2km Duplex LC DOM SMF Optical Transceiver Module (Industrial)

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Product summary

Product
LINK-PP LS-SM311G-02I 1.25G SFP 1310nm 2km Duplex LC DOM SMF Optical Transceiver Module (Industrial)
SKU
197941
P/N
LS-SM311G-02I
Price
$ 6.5
Stock
470 in Stock
Sold
230
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
57 Reviews
4 Questions
230 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-02I 1.25G SFP Specifications

The LINK-PP LS-SM311G-02I is a high-performance 1.25Gbps SFP transceiver engineered for single-mode fiber infrastructure. It features a 1310nm FP laser transmitter paired with a highly sensitive PIN photodiode receiver. Operating on a stable +3.3V power supply, this hot-pluggable module fully complies with standard SFP MSA and SFF-8472 specifications. It delivers efficient gigabit data transmission.

LINK-PP Part Number LS-SM311G-02I Vendor Name LINK-PP
Form Factor SFP Max Data Rate 1.25Gbps
Wavelength 1310nm Max Cable Distance 2km
Connector Duplex LC Media SMF
Transmitter Type FP Receiver Type

PIN

TX Power -12 to -3dBm 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

Key Features of LINK-PP LS-SM311G-02I 1.25G SFP

This transceiver stands out with its exceptional industrial operating temperature range spanning from -40°C to +85°C. Key advantages include a hot-swappable SFP footprint, real-time digital diagnostic monitoring, a duplex LC receptacle, built-in Class 1 laser safety compliance, and comprehensive transmitter fault indicators.

LINK-PP LS-SM311G-02I 1.25G SFP Optical Module

As a premier optical networking solution, this 1.25G SFP module from LINK-PP combines cost-effectiveness with elite performance. It serves as a reliable component for modern fiber optic transport networks.

LS-SM311G-02I: 1.25G Connectivity for IP Surveillance Camera Backhaul

This industrial-grade transceiver provides ultra-stable 1.25Gbps connectivity perfectly suited for outdoor IP surveillance camera backhaul. Its rugged architecture guarantees continuous high-definition video data transmission under severe weather and harsh outdoor environments.

LS-SM311G-02I Module with 1310nm Wavelength

Operating at a precise 1310nm center wavelength, this SFP module utilizes an advanced FP laser transmitter. This specific optical wavelength minimizes signal attenuation, facilitating clean and highly accurate data transmission through single-mode fiber channels.

LS-SM311G-02I Module Supporting 2km Transmission

Engineered to bridge intermediate network spans, this module reliably supports data transmission distances up to 2km over single-mode fiber. It provides an ideal long-reach link for interconnected buildings, campuses, and localized industrial infrastructure.

LS-SM311G-02I Module with Duplex LC Interface

Equipped with a high-quality duplex LC connector receptacle, the transceiver ensures standard compliance and minimal optical insertion loss. This interface provides tight, snap-in fiber connectivity, maximizing physical link stability across high-density enterprise switch panels.

LS-SM311G-02I Module with DOM for Real-Time Monitoring

The module incorporates smart Digital Optical Monitoring via an I2C interface. This feature allows network administrators to perform real-time tracking of vital diagnostics including internal operating temperature, transceiver voltage, and optical laser power.


LINK-PP LS-SM311G-02I 1.25G SFP Certification

Fully certified to meet international criteria, this transceiver carries valid FCC and RoHS marks, certifying its strict adherence to electromagnetic safety standards and eco-friendly manufacturing directives.

Optical Transceivers Testing

LINK-PP subjects every optical transceiver to an exhaustive hardware quality testing program, validating performance benchmarks under professional pseudo-random binary sequence patterns prior to final product packaging.

LS-SM311G-02I Quality Certifications

Boasting complete regulatory compliance, this integrated module holds official certifications validating its design parity with the authoritative multi-source agreement parameters set for global SFP hardware.

LS-SM311G-02I Certified for Reliable Host-Device Compatibility

The unit is fully certified for flawless host-device compatibility, guaranteeing seamless electrical and mechanical integration with modern switches, router ports, and diverse SERDES IC platforms.


Rigorous Testing Ensures Reliable SFP Performance

LINK-PP implements an extensive, multi-phase engineering validation protocol to guarantee that every single-mode transceiver achieves maximum operational reliability under extreme stress.

Optical

Optical Spectrum Test

Technicians strictly measure the 1310nm center wavelength to prevent optical dispersion.

Optical

Eye Pattern Test

This test evaluates transmitter signal quality to confirm excellent differential data input swing.

Optical

Bit Error Rate Test

Engineers verify optical data integrity, ensuring the bit error rate remains incredibly low.

Optical

Temperature Test

Every industrial module undergoes intense thermal chamber cycling from -40°C up to +85°C.


Product Shipping for LINK-PP LS-SM311G-02I 1.25G SFP

LINK-PP manages an efficient and secure logistics network, ensuring that your premium optical products are dispatched quickly and arrive in pristine condition.

Anti-Static Protective Packaging

Anti-Static Protective Packaging

Specialized ESD protective packaging completely isolates delicate electronics from static threats.

Shock-Resistant Transport Protection

Shock-Resistant Transport Protection

Heavy-duty cushioned layouts shield optical modules against severe physical transit vibrations.

Fast Order Processing and Dispatch

Fast Order Processing and Dispatch

Streamlined warehouse operations guarantee rapid processing and prompt international item dispatch.

Global Logistics and International Delivery

Global Logistics and International Delivery

Partnered global freight carriers facilitate secure, tracked shipping directly to your infrastructure.

LINK-PP LS-SM311G-02I 1.25G SFP Usage Demonstration

This operational guide demonstrates how effortlessly the hot-pluggable single-mode transceiver slots directly into live network switch cages, establishing instant gigabit fiber links without triggering system interruptions or requiring complex host board reboots.

LS-SM311G-02I 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-02I 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-02I 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

LINK-PP LS-SM311G-02I 1.25G SFP FAQ

Find answers to frequently asked questions about the LS-SM311G-02I optical transceiver.

This module supports high-performance data rates up to 1.25Gbps for gigabit networks.
It is designed exclusively for single-mode fiber (SMF) networks via duplex LC connectors.
It reliably transmits high-speed optical signals up to a maximum distance of 2km.
This rugged industrial-grade module operates perfectly from -40°C up to +85°C.

Model Comparison Table

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J***l
Taiwan, Province of China
Verified Purchase
5 .0
2026-05-19
Integrated perfectly with our Arista switches. 1.25Gbps link negotiated instantly on single-mode fiber runs.
K***t
Norway
Verified Purchase
5 .0
2026-05-06
Flawless Cisco compatibility out of the box!
M***n
Mexico
Verified Purchase
5 .0
2026-04-20
Tested with Cisco and Juniper switches for our base station backhaul. 1310nm FP transmitter pushes perfectly to 2km on SMF with zero packet loss. Excellent B2B alternative for enterprise deployments.
C***s
Canada
Verified Purchase
5 .0
2026-04-19
The DDM stats read perfectly on my Fortinet firewall. Awesome industrial SFP module!
J***r
Ukraine
Verified Purchase
5 .0
2026-02-11
Replaced failing modules in a factory floor rack where temps hit 80°C. This wide-temp transceiver didn't flinch. Duplex LC interface snapped in tight. Definitely our go-to 1.25Gbps SFP moving forward.
M***n
Peru
Verified Purchase
5 .0
2025-12-19
Reliable optical transceiver module for extreme heat environments. No connection drops so far.
M***r
Poland
Verified Purchase
5 .0
2025-12-14
Instant plug-and-play with our Dell switches.
M***s
Ukraine
Verified Purchase
5 .0
2025-12-13
PIN receiver sensitivity is on point. Fixed our long-reach link issues immediately!
S***z
Peru
Verified Purchase
5 .0
2025-12-12
Handles 85°C operating temp like a champ.
D***n
Netherlands
Verified Purchase
5 .0
2025-08-22
Great SMF optical transceiver for the price.
J***t
Singapore
Verified Purchase
5 .0
2025-08-04
Hard to tell on your site what the quantity of an item is in your shopping cart. Had to add the item twice.
M***n
Germany
Verified Purchase
5 .0
2025-07-20
Bought a batch for CCTV backhaul. Solid 1310nm wavelength performance across 1.5 miles.
C***n
United States
Verified Purchase
5 .0
2025-07-14
Lots of products but hard to find the exact one I need.
B***r
Canada
Verified Purchase
5 .0
2025-06-01
Good prices and value
D***z
Malaysia
Verified Purchase
5 .0
2025-05-21
DOM readings are highly accurate. Good stuff!
J***s
Hungary
Verified Purchase
5 .0
2025-05-17
Excellent quality, could't ask for better, unbelievable
A***a
Thailand
Verified Purchase
5 .0
2025-05-12
Excellent Quality and Good Service
K***y
United States
Verified Purchase
5 .0
2025-05-09
great service at a good price.
P***e
South Africa
Verified Purchase
5 .0
2025-04-29
Solid 1310nm performance. Will buy again.
P***g
Nepal
Verified Purchase
5 .0
2025-04-23
The 10/25/40G Transceiver Modules I received more than met my expectations.
S***z
Austria
Verified Purchase
5 .0
2025-04-07
Great price for an industrial-grade gigabit transceiver. Works flawlessly in our outdoor enclosures. ☔
G***p
Brazil
Verified Purchase
5 .0
2025-04-02
placed my order, made my payment, but it was was shipped slowly.
L***r
Morocco
Verified Purchase
5 .0
2025-03-25
I had a good experience with Link-PP. Hope to do more business in the future.
D***l
Venezuela
Verified Purchase
5 .0
2025-03-10
Deployed these industrial 1.25G SFPs in outdoor surveillance cabinets. Handled the -40°C freeze effortlessly! DOM feature is accurate for laser power monitoring across our entire campus single-mode fiber network.
D***s
Ethiopia
Verified Purchase
5 .0
2025-02-23
Working perfectly in our outdoor IP cameras.
M***n
Israel
Verified Purchase
5 .0
2025-02-19
Great ricing, awesome customer service!!
P***n
Argentina
Verified Purchase
4 .0
2025-02-15
OEM compatibility is great, just wish the bulk packaging was a bit more secure.
T***r
Turkey
Verified Purchase
5 .0
2025-01-12
Great price, great product!
C***z
Turkey
Verified Purchase
5 .0
2024-12-30
Everything I've bought has been great and the website is easy to use.
S***n
Argentina
Verified Purchase
5 .0
2024-12-09
Fast shipping to California. Excellent 1.25G SFP!
I***n
Brunei Darussalam
Verified Purchase
5 .0
2024-12-08
Shipping speed and quality from LINK-PP is always phenomenal.
P***k
Russian Federation
Verified Purchase
5 .0
2024-12-01
Duplex LC connector fits perfectly into our Netgear gear. Good 1.25G transceiver overall.
M***e
Hong Kong
Verified Purchase
5 .0
2024-10-28
Upgraded our NAS networking with these DOM-enabled SFP modules. SFF-8472 protocol support works flawlessly. Real-time DDM diagnostics are a lifesaver for troubleshooting remote node connectivity. Highly recommend for telecom use!
B***n
Finland
Verified Purchase
5 .0
2024-10-24
Perfect gigabit module for 2km fiber runs.
N***r
Thailand
Verified Purchase
5 .0
2024-10-18
Perfect 2km transmission for our multi-building fiber network. Arrived fast in Texas!
T***g
Finland
Verified Purchase
5 .0
2024-09-13
Very satisfied, Very Fast on delivery and I'm sure I will need to order again soon.
i***d
Norway
Verified Purchase
5 .0
2024-08-18
Very knowledgeable, quick responses, very good prices and great customer service
B***g
Macao
Verified Purchase
5 .0
2024-08-05
LINK-PP charged for shipping on my small order, but the item arrived quickly and in great packaging. Highly recommend this product and company!
R***e
Russian Federation
Verified Purchase
5 .0
2024-08-04
Very Very good service. Ordered product and received before the date that was given.
H***n
Taiwan, Province of China
Verified Purchase
5 .0
2024-07-12
Customer service is friendly and helpful. Price is charming. Quality is as expected.
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