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LINK-PP LS-SM311G-20C 1G SFP 1310nm 20km Duplex LC DOM SMF Optical Transceiver Module
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LINK-PP LS-SM311G-20C 1G SFP 1310nm 20km Duplex LC DOM SMF Optical Transceiver Module

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Product summary

Product
LINK-PP LS-SM311G-20C 1G SFP 1310nm 20km Duplex LC DOM SMF Optical Transceiver Module
SKU
181608
P/N
LS-SM311G-20C
Price
$ 5
Stock
599 in Stock
Sold
670
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
22 Reviews
4 Questions
670 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-20C 1G SFP Specifications

The LINK-PP LS-SM311G-20C is a high-performance commercial-grade 1G SFP transceiver tailored for standard gigabit ethernet operations. Operating over a 1310nm wavelength, it efficiently delivers high-speed data transmission up to 20km across single-mode fiber infrastructure. Equipped with a duplex LC interface, this hot-pluggable optical module integrates seamlessly into standard network switches, ensuring dependable link performance.

LINK-PP Part Number LS-SM311G-20C 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
0 to 70°C Protocols
SFF-8472 MSA Compliant, IEEE 802.3ah-2004, IEEE 802.3z

Key Features of LINK-PP LS-SM311G-20C 1G SFP

This SFP module features a hot-pluggable footprint and dual LC connector for straightforward integration. It leverages an advanced 1310nm FP laser transmitter and a highly sensitive PIN photodiode receiver, delivering consistent 1.25Gbps throughput across extended single-mode fiber links while minimizing internal power consumption.

LINK-PP LS-SM311G-20C 1G SFP Optical Module

The LS-SM311G-20C optical module is an industrial-grade enterprise solution designed to upgrade networking hardware. Fully optimized for high-density environments, it bridges critical communication nodes seamlessly, offering stable connectivity and low latency across optical network frameworks.

LS-SM311G-20C: 1G Connectivity for Campus Networks

Perfect for modern campus deployments, this module delivers robust gigabit backbone links between multi-building architectures. It provides a highly economical and dependable path for expanding university networks, interconnecting local departments with uncompromised throughput.

LS-SM311G-20C Module with 1310nm Wavelength

Utilizing the highly efficient 1310nm optical band, this transceiver ensures optimal light propagation with minimal signal attenuation. It is engineered specifically for mid-range fiber lines, maintaining strong data integrity throughout enterprise networking routing systems.

LS-SM311G-20C Module Supporting 20km Transmission

Designed for intermediate spatial reaches, this SFP module reliably covers distances up to 20 kilometers without signal degradation. It provides enterprise data centers with an efficient, reliable connection to remote suburban branches and external facilities.

LS-SM311G-20C Module with Duplex LC Interface

Featuring standard duplex LC optical connection ports, the transceiver guarantees secure, tight physical latching and low insertion loss. This structured alignment minimizes back-reflections, supporting clean, high-speed bi-directional data flow.

LS-SM311G-20C Module with DOM for Real-Time Monitoring

Featuring built-in Digital Optical Monitoring, the module reports real-time operating diagnostics via standard SFF-8472 guidelines. Netops teams can seamlessly monitor transceiver temperature, supply voltages, and optical power levels.


LINK-PP LS-SM311G-20C 1G SFP Certification

The LS-SM311G-20C transceiver complies fully with global structural standards, ensuring international network interoperability. It is built under eco-friendly guidelines to guarantee reliable operation in advanced commercial environments.

Optical Transceivers Testing

Every optical asset undergoes exhaustive verification processes within our automated facility. Technicians strictly examine functional metrics to verify that every unit matches production parameters perfectly before customer dispatch.

LS-SM311G-20C Quality Certifications

Manufactured under strict ISO9001 frameworks, this product holds valid CE, FCC, and RoHS certifications. It satisfies Class 1 laser safety mandates, ensuring complete environmental and operational compliance.

LS-SM311G-20C Certified for Reliable Host-Device Compatibility

Engineered according to strict MSA multisource agreements, the module ensures multi-vendor host matching. It runs smoothly inside mainstream routers, enterprise switches, and media converters without configuration errors.


Rigorous Testing Ensures Reliable SFP Performance

LINK-PP utilizes advanced validation hardware to execute thorough hardware diagnostics. This testing process mitigates failures, ensuring reliable, long-term network uptime for enterprises.

Optical

Optical Spectrum Test

Engineers measure center wavelengths to ensure the 1310nm FP laser emission meets exact transmission specifications.

Optical

Eye Pattern Test

Automated systems analyze the transmitter eye diagram to guarantee clean signal shapes and low jitter.

Optical

Bit Error Rate Test

Every module undergoes full-load bandwidth testing to verify flawless, packet-drop-free data transmission performance.

Optical

Temperature Test

Thermal chambers validate optical performance from 0°C to 70°C, ensuring commercial environmental stability.


Product Shipping for LINK-PP LS-SM311G-20C 1G SFP

We utilize professional distribution methods to guarantee that all optical modules arrive safely at your facility, remaining perfectly intact.

Anti-Static Protective Packaging

Anti-Static Protective Packaging

Each SFP is sealed in a static-shielding ESD bag to prevent electrical damage.

Shock-Resistant Transport Protection

Shock-Resistant Transport Protection

Custom-molded blister trays cushion transceivers from heavy vibrations and physical drops during transit.

Fast Order Processing and Dispatch

Fast Order Processing and Dispatch

Our streamlined warehouse logistics pipeline guarantees rapid verification and immediate dispatch of your network hardware.

Global Logistics and International Delivery

Global Logistics and International Delivery

Partnering with premium global freight carriers ensures rapid air shipping to worldwide enterprise locations.

LINK-PP LS-SM311G-20C 1G SFP Usage Demonstration

Deploying the unit requires inserting it into an empty SFP cage until it clicks securely. Attach the duplex LC fiber patch cord, check the active port link LED indicator, and monitor operational parameters via the host system GUI.

LS-SM311G-20C 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-20C 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-20C 1G 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

LINK-PP

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J***g
Venezuela
Verified Purchase
4 .0
2026-03-03
Standard shipping to London took extra days, but 1310nm 20km SFP is solid.
L***r
United Arab Emirates
Verified Purchase
5 .0
2026-03-01
Flawless SFP module for fiber SMF deployments.
M***r
Greece
Verified Purchase
5 .0
2026-03-01
Deployed these 1G 1310nm SFPs for our Seattle campus network over SMF. Flawless Cisco switch compatibility and the SFF-8472 DOM metrics are highly accurate. Fantastic for bulk data center rollouts!
W***l
Ireland
Verified Purchase
5 .0
2026-02-21
Great 1.25Gbps throughput for home NAS.
B***s
Belgium
Verified Purchase
5 .0
2025-11-26
OEM compatible SFP! Plug and play easily.
S***s
Portugal
Verified Purchase
5 .0
2025-11-13
Very stable DDM monitoring on H3C gear. Fast deployment for Paris network ops.
S***s
Malaysia
Verified Purchase
5 .0
2025-11-12
Cheap 1g sfp 1310nm modules for UK data centers, DOM works great on Mikrotik.
W***h
Brazil
Verified Purchase
5 .0
2025-11-03
Replaced old optics with these duplex LC SMF transceivers for our Frankfurt server racks. The 20km distance covers our metro links effortlessly. Unbeatable price for Dell and Juniper OEM compatibility!
W***n
Panama
Verified Purchase
5 .0
2025-10-02
Affordable gigabit optical modules for b2b buyers.
J***s
Poland
Verified Purchase
5 .0
2025-09-19
Great IEEE 802.3z compliant SFP for Toronto enterprise procurement. Reliable PIN receiver specs.
J***z
Germany
Verified Purchase
5 .0
2025-09-10
Accurate DOM readings, superb network equipment value.
D***n
Brazil
Verified Purchase
5 .0
2025-07-25
Solid 20km transceiver for long distance links.
R***r
Singapore
Verified Purchase
5 .0
2025-07-20
Tested the LS-SM311G-20C module in outdoor cabinets across Texas. Despite the commercial 0-70°C rating, it handled the summer heat perfectly. Excellent IEEE 802.3z protocol support for our base station backhaul!
A***n
Taiwan, Province of China
Verified Purchase
5 .0
2025-06-30
Runs cool at 0-70°C commercial temp. ❄️
D***n
Sweden
Verified Purchase
5 .0
2025-05-30
Purchased bulk LS-SM311G-20C transceivers for Chicago office routing. Clean duplex LC connection! (o_o)
S***z
Taiwan, Province of China
Verified Purchase
5 .0
2025-05-16
Duplex LC clicks in tight, zero issues.
L***t
Dominican Republic
Verified Purchase
5 .0
2025-05-03
Works perfectly with my unifi 1G switch.
J***h
Tunisia
Verified Purchase
5 .0
2025-04-12
Good Tx/Rx power balance. Ideal 1310nm optical transceiver for indoor rack setups. ¯_(ツ)_/¯
A***l
Austria
Verified Purchase
5 .0
2025-04-09
Upgraded my home gigabit NAS setup in California using this 1G fiber optic module. The Tx/Rx power levels are stable, and the FP laser runs cool. Highly recommend for enterprise-grade homelabs.
D***z
Dominican Republic
Verified Purchase
5 .0
2025-01-28
Tested in Extreme switches, this 1.25Gbps module handles our 15km warehouse links perfectly.
M***t
Denmark
Verified Purchase
5 .0
2025-01-11
Perfect 20km single-mode reach for our Florida campus fiber network. Rock solid!
M***a
Colombia
Verified Purchase
5 .0
2024-12-03
Fast link up on Alcatel-Lucent hardware. ⚡
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