Free shipping over $600. For wholesale pricing, please contact us directly.
Need Help?
Chat live with us
Live Chat
Want to call?

+ 86-752-3386717

Language: English
  1. English
  2. Русский
  3. Português
  4. Español
  5. Nederlands
  6. Français
  7. Italiano
  8. Deutsch
  9. العربية
  10. Ελληνικά
  11. にほんご
  12. 한국어
  13. Tiếng Việt
  14. Indonesian
  15. Thai
Currency: USD
USD - US Dollar
EUR - Euro
GBP - British Pound
CAD - Canadian Dollar
AUD - Australian Dollar
JPY - Japanese Yen
SEK - Swedish Krona
NOK - Norwegian Krone
IDR - Indonesia Rupiahs
BRL - Brazilian Real
THB - Thailand Baht
  • Mind your business with a variety of trusted payment options.

  • Use order number or tracking number to check shipping status.

  • Get your quote fast and offer you more professional service.

  • Help manage your budget & expenditure better.

  • Meet us and know our mission, belief, service and more.

  • Find our locations and get connected with us closely.

  • Quality management, testing, compatibility and global compliance.

  • Download ISO, CE, FCC, UL, RoHS and REACH certificates by product line.

  • Lab tour, optical test bed, compatibility tool and test requests.

  • Find out the latest news and events around l-p.com

  • Deep dive into technical guides, industry standards, and SFP compatibility insights.

  • Detailed product benchmarks and side-by-side comparisons to help you choose the right module.

  • Explore real-world connectivity solutions for data centers, enterprises, and telecom networks.

  • Essential tips on choosing data rates, transmission distances, and connector types.

Language
  1. English
  2. Русский
  3. Português
  4. Español
  5. Français
  6. Italiano
  7. Deutsch
  8. العربية
  9. にほんご
  10. Tiếng Việt
  11. Indonesian
  12. Thai
Select Currency
USD - US Dollar
EUR - Euro
GBP - British Pound
CAD - Canadian Dollar
AUD - Australian Dollar
JPY - Japanese Yen
SEK - Swedish Krona
NOK - Norwegian Krone
IDR - Indonesia Rupiahs
BRL - Brazilian Real
THB - Thailand Baht
LS-BL31491G-20C 1g sfp bidi 1310nm-tx 1490nm-rx 20km dom simplex lc smf optical transceiver module
Click to open expanded view

LINK-PP LS-BL31491G-20C 1G SFP BiDi 1310nm-TX/1490nm-RX 20km DOM Simplex LC SMF Optical Transceiver Module

Add to wish Compare

Product summary

Product
LINK-PP LS-BL31491G-20C 1G SFP BiDi 1310nm-TX/1490nm-RX 20km DOM Simplex LC SMF Optical Transceiver Module
SKU
183493
P/N
LS-BL31491G-20C
Price
$ 14.5
Stock
1320 in Stock
Sold
1.8K
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
25 Reviews
4 Questions
1.8K Sold
$ 14.5 0% OFF )
Free shipping. For wholesale pricing, please contact us directly.
Qty (pcs) :
Unit Price :
1
$ 14.5
100
$ 13.775
1000
$ 13.34
3000
$ 12.905
6000
$ 12.47
Manufacture: LINK-PP P/N: LS-BL31491G-20C SKU: 183493
Compatible P/N:
LS-BL31551G-02C | 2km
LS-BL55311G-02C | 2km
LS-BL31551G-03C | 3km
LS-BL31551G-03I | 3km
LS-BL55311G-03C | 3km
LS-BL55311G-03I | 3km
LS-BL31491G-10C | 10km
LS-BL31491G-10I | 10km
LS-BL31551G-10C | 10km
LS-BL31551G-10I | 10km
LS-BL31551GE-10C | 10km
LS-BL49311G-10C | 10km
LS-BL49311G-10I | 10km
LS-BL49551G-10C | 10km
LS-BL49551G-10I | 10km
LS-BL55311G-10C | 10km
LS-BL55311G-10I | 10km
LS-BL55311GE-10C | 10km
LS-BL55491G-10C | 10km
LS-BL55491G-10I | 10km
LS-BL31551G-15C | 15km
LS-BL31491G-20C | 20km
LS-BL31491G-20I | 20km
LS-BL31551G-20C | 20km
LS-BL31551G-20I | 20km
LS-BL49311G-20C | 20km
LS-BL49311G-20I | 20km
LS-BL49551G-20C | 20km
LS-BL55311G-20C | 20km
LS-BL55311G-20I | 20km
LS-BL55491G-20C | 20km
LS-BL31491G-40C | 40km
LS-BL31491G-40I | 40km
LS-BL31551G-40C | 40km
LS-BL31551G-40I | 40km
LS-BL49311G-40C | 40km
LS-BL49311G-40I | 40km
LS-BL55311G-40C | 40km
LS-BL55311G-40I | 40km
LS-BL31551G-60C | 60km
LS-BL31551G-60I | 60km
LS-BL49551G-60C | 60km
LS-BL55311G-60C | 60km
LS-BL55311G-60I | 60km
LS-BL55491G-60C | 60km
LS-BL27331G-80C | 80km
LS-BL33271G-80C | 80km
LS-BL49551G-80C | 80km
LS-BL49551G-80I | 80km
LS-BL55491G-80C | 80km
LS-BL55491G-80I | 80km
LS-BL49551G-A0C | 100km
LS-BL49551G-A0I | 100km
LS-BL55491G-A0C | 100km
LS-BL55491G-A0I | 100km
LS-BL49551G-A2C | 120km
LS-BL49551G-A2I | 120km
LS-BL55491G-A2C | 120km
LS-BL55491G-A2I | 120km
LS-BL49551G-A5C | 150km
LS-BL49551G-A5I | 150km
LS-BL55491G-A5C | 150km
LS-BL55491G-A5I | 150km
LS-BL49551G-A6C | 160km
LS-BL49551G-A6I | 160km
LS-BL55491G-A6C | 160km
LS-BL55491G-A6I | 160km
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.
Stock:
{{parseInt(detail_data.left_num) ? detail_data.left_num +' in Stock' :detail_data.zeroStockOrder==0?'Out of Stock':'Available'}} .
Quantity:
( Min. Order {{detail_data.prodInfo.minimum_ordered_quantity}} )
Total Price:
{{ detail_data.displayed_price.unit_prefix }} {{ detail_data.displayed_price.total }}
{{ detail_data.displayed_price.unit_prefix }} {{ detail_data.displayed_price.original_total_price }} ( {{ detail_data.displayed_price.rate_of_discount }}% OFF ) {{detail_data.displayed_price.ex_sell_type}}

LINK-PP LS-BL31491G-20C 1G BiDi SFP Specifications

The LINK-PP LS-BL31491G-20C is a premium 1G BiDi SFP optical transceiver engineered for high-performance Gigabit Ethernet. Operating over single-mode fiber, this 1000BASE-BX-U module delivers a reliable 1.25Gbps data rate. With advanced 1310nm FP laser technology and a durable simplex LC connector, it ensures seamless bidirectional networking for your communication infrastructure.

LINK-PP Part Number LS-BL31491G-20C Vendor Name LINK-PP
Form Factor SFP Max Data Rate 1.25Gbps
Wavelength 1310nm-TX/1490nm-RX Max Cable Distance 20km
Connector Simplex 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
Fast Ethernet, Gigabit Fibre Channel, MSA Compliant

Key Features of LINK-PP LS-BL31491G-20C 1G BiDi SFP

Discover the remarkable capabilities of the LINK-PP LS-BL31491G-20C 1G BiDi SFP. This hot-pluggable transceiver boasts an energy-efficient design, single-fiber bidirectional transmission, and built-in digital diagnostic monitoring. It maximizes bandwidth efficiency while offering exceptional plug-and-play convenience for modern network deployments.

LINK-PP LS-BL31491G-20C 1G BiDi SFP Optical Module

The LINK-PP LS-BL31491G-20C 1G BiDi SFP optical module represents a cost-effective solution for telecommunication systems. By utilizing advanced WDM technology, this transceiver optimizes fiber utilization, making it an ideal choice for high-speed fiber-to-the-home and enterprise applications.

LS-BL31491G-20C: 1G Connectivity for Enterprise LAN Backbone

Upgrade your infrastructure with the LS-BL31491G-20C module, designed to deliver robust 1G connectivity for enterprise LAN backbones. This reliable Gigabit Ethernet transceiver guarantees stable, low-latency networking, ensuring continuous data flow across demanding corporate environments.

LS-BL31491G-20C Module with 1310nm-TX and 1490nm-RX Wavelength

Featuring a precise 1310nm FP laser transmitter and 1490nm PIN receiver, the LS-BL31491G-20C module with 1310nm-TX and 1490nm-RX wavelength minimizes signal interference. This precise optical configuration guarantees outstanding signal integrity across your dedicated bidirectional network links.

LS-BL31491G-20C Module Supporting 20km Transmission

Engineered for long-reach networking, the LS-BL31491G-20C module supporting 20km transmission excels over standard single-mode fiber. It provides an impressive link budget, making it the perfect gigabit transceiver for connecting remote switches, routers, and campus access points.

LS-BL31491G-20C Module with Simplex LC Interface

Built for easy integration, the LS-BL31491G-20C module with simplex LC interface simplifies your optical patch panel connections. This industry-standard connector ensures minimal insertion loss and highly secure physical links for your essential Gigabit networking equipment.

LS-BL31491G-20C Module with DOM for Real-Time Monitoring

Proactively manage your network using the LS-BL31491G-20C module with DOM for real-time monitoring. This digital diagnostic feature accurately tracks critical parameters like temperature, voltage, and optical power, helping administrators prevent potential link failures before they happen.


LINK-PP LS-BL31491G-20C 1G SFP Certification

Every LINK-PP LS-BL31491G-20C 1G SFP certification reflects our commitment to industry standards. These optical transceivers comply strictly with MSA specifications, ensuring outstanding safety and operational excellence globally.

Optical Transceivers Testing

The comprehensive LS-BL31491G-20C quality testing program guarantees exceptional reliability. We subject every single 1G BiDi SFP module to rigorous evaluations, verifying unmatched performance across complex enterprise networking environments.

LS-BL31491G-20C Quality Certifications

Our transceivers hold key LS-BL31491G-20C quality certifications including CE, FCC, and RoHS. These recognized global standards demonstrate compliance with environmental safety and superior electromagnetic interference protection protocols.

LS-BL31491G-20C Certified for Reliable Host-Device Compatibility

The LS-BL31491G-20C certified for reliable host-device compatibility undergoes extensive switch interoperability checks. This ensures flawless plug-and-play execution alongside major networking brands like Cisco, Huawei, and HP switches.


Rigorous Testing Ensures Reliable SFP Performance

Extensive factory inspections and rigorous testing ensures reliable SFP performance. Each transceiver passes strict optical and electrical assessments before leaving our modern facility.

Optical

Optical Spectrum Test

The optical spectrum test validates the 1310nm FP laser center wavelength accuracy consistently.

Optical

Eye Pattern Test

An advanced eye pattern test confirms excellent signal integrity and minimal optical distortion.

Optical

Bit Error Rate Test

Our bit error rate test guarantees zero packet loss during continuous gigabit transmission.

Optical

Temperature Test

A demanding temperature test ensures stable operation within commercial zero to seventy degrees.


Product Shipping for LINK-PP LS-BL31491G-20C 1G SFP

We prioritize secure product shipping for LINK-PP LS-BL31491G-20C 1G SFP orders, ensuring your optical modules arrive safely, swiftly, and ready for deployment.

Anti-Static Protective Packaging

Anti-Static Protective Packaging

Premium anti-static protective packaging prevents electrostatic discharge damage during transit.

Shock-Resistant Transport Protection

Shock-Resistant Transport Protection

Durable shock-resistant transport protection shields delicate components from physical impacts.

Fast Order Processing and Dispatch

Fast Order Processing and Dispatch

Experience fast order processing and dispatch for immediate networking upgrades.

Global Logistics and International Delivery

Global Logistics and International Delivery

Trusted global logistics and international delivery bring products worldwide seamlessly.

LINK-PP LS-BL31491G-20C 1G SFP Usage Demonstration

Watch our complete LINK-PP LS-BL31491G-20C 1G SFP usage demonstration to see the effortless installation process. Learn how to securely insert the single-mode fiber transceiver into a compatible network switch and verify operational status quickly.

LS-BL31491G-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-BL31491G-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-BL31491G-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

Matching Products

Pictures ID# Description Price Stock Add to Cart

Questions & Answers

Ask a Question
No data

Customer Reviews

Write a Review
  • {{stardata.star}}

    {{comment.count}} reviews

  • 5 Stars
    {{comment.star5}}%
    4 Stars
    {{comment.star4}}%
    3 Stars
    {{comment.star3}}%
    2 Stars
    {{comment.star2}}%
    1 Star
    {{comment.star1}}%
No data
D***s
France
Verified Purchase
5 .0
2026-03-03
The 1310nm-TX/1490nm-RX wavelength pair worked seamlessly with our existing Alcatel-Lucent hardware.
L***g
Norway
Verified Purchase
5 .0
2026-02-06
Rock solid 20km SMF link.
M***n
Austria
Verified Purchase
5 .0
2026-01-25
Works flawlessly with my Dell switch.
L***r
Portugal
Verified Purchase
5 .0
2026-01-04
Tested in our outdoor cabinet for cell tower backhaul. Even though it's 0 to 70°C rated, it handles the summer heat fine. Great Simplex LC SMF optical transceiver for the price. ☀️
N***s
Sweden
Verified Purchase
5 .0
2026-01-02
Cost-effective Gigabit Ethernet solution. Bought 50 units for a client's IP camera deployment.
W***r
Japan
Verified Purchase
5 .0
2025-12-29
Perfect 1G BiDi SFP for our server racks. TX/RX optical levels look great.
P***n
Ireland
Verified Purchase
5 .0
2025-11-12
Easy plug and play Gigabit fiber. ⚡
L***n
United States
Verified Purchase
5 .0
2025-11-06
Nice simplex LC connector fit. Works great for connecting distant campus buildings.
A***s
Bolivia
Verified Purchase
5 .0
2025-11-04
Needed a reliable 1G link for my home 10G NAS backup server. This 20km DOM Simplex LC transceiver connected flawlessly to my Unifi switch. Plug and play, zero CRC errors!
B***z
Netherlands
Verified Purchase
5 .0
2025-09-14
Top notch 1.25G SFP BiDi transceiver!
E***n
Venezuela
Verified Purchase
5 .0
2025-08-30
DOM support is highly accurate. Replaced old 1G SFPs in our Fortinet firewalls perfectly.
R***s
Italy
Verified Purchase
4 .0
2025-08-15
Box was slightly crushed upon arrival, but the 1.25G SFP BiDi works perfectly.
R***t
United States
Verified Purchase
5 .0
2025-07-22
Fits our HPE servers perfectly.
R***s
Thailand
Verified Purchase
5 .0
2025-06-22
Perfect Cisco compatible 1G SFP.
J***s
Brazil
Verified Purchase
5 .0
2025-05-23
Flawless DDM integration on our Netgear switches. Really happy with this LC module!
S***n
United States
Verified Purchase
5 .0
2025-05-09
Cheap and reliable LC SMF module!
D***s
Canada
Verified Purchase
4 .0
2025-03-22
Took a day longer than expected. SFP 20km modules fired up instantly though. ⏱️
L***z
Switzerland
Verified Purchase
5 .0
2025-03-20
Accurate DDM monitoring out of the box.
N***n
Viet Nam
Verified Purchase
5 .0
2025-01-15
Great value for enterprise B2B networking gear.
M***e
Colombia
Verified Purchase
5 .0
2024-12-28
Solid 20km transmission distance on single-mode fiber. Great for our factory network.
K***g
Hong Kong
Verified Purchase
5 .0
2024-11-30
0 to 70°C temp rating holds up.
S***n
Portugal
Verified Purchase
5 .0
2024-11-22
Great transceiver for MSA compliant switches. Easy install for our server room upgrade.
J***n
Germany
Verified Purchase
5 .0
2024-11-01
Excellent 1.25G SFP BiDi for data center mass deployment. We mixed them with Juniper and Extreme switches, MSA compliance is spot on. Outstanding total cost of ownership for B2B procurement.
C***l
Costa Rica
Verified Purchase
5 .0
2024-10-15
Deployed these 1310nm-TX/1490nm-RX modules across our campus fiber network. Flawless DOM monitoring and 100% Cisco compatible. Transmit power stays within -9 to 0dBm perfectly. Highly recommend for enterprise bulk upgrades!
P***s
Spain
Verified Purchase
5 .0
2024-10-12
Fast shipping, great 1310nm-TX SFP unit.
{{comments.user.name}}
{{comments.user.country}}
Verified Purchase
{{comments.rating}}.0
{{comments.date_added}}
{{comments.text}}
Showing {{comments.replies.length}} comment

{{reply_items.topic || reply_items.text}}By {{reply_items.author}}

Not yet rated . Be the first to Write a Review
|
{{ item.sold_num }} Sold

{{ item.displayed_price.unit_prefix }} {{ item.displayed_price.value || item.displayed_price.min }}

  • {{ detail_data.displayed_price.unit_prefix }}  {{ detail_data.displayed_price.value }}

    {{parseInt(detail_data.left_num) ? detail_data.left_num +' in Stock' :detail_data.zeroStockOrder==0?'Out of Stock':'Available'}}