Just to confirm before I buy, does this use a Simplex SC connector, and is it compatible with standard single-mode fiber?

Spot on! This module features a Simplex SC optical interface and is fully compatible with standard 9/125碌m Single-Mode Fiber (SMF). Just remember to pair it with a complementary 1550nm-TX/1310nm-RX module on the other end of the 20km link to establish a successful connection!

Do these transceivers meet 1000BASE-BX standards and support real-time monitoring for our intelligent transportation network?

Yes! The module strictly adheres to 1000BASE-BX protocols and IEEE 802.3z standards. It also features built-in DOM/DDM capabilities compliant with SFF-8472, allowing your sysadmins to monitor optical TX/RX power, voltage, and temperature in real-time.

Hi there, I need to mix these with Cisco and Aruba switches in our campus network. Does this LS-SC31551G-20I have any OEM compatibility issues, or is it strictly plug-and-play?

The LS-SC31551G-20I is 100% MSA compliant and offers seamless OEM compatibility. It is rigorously tested for plug-and-play interoperability with Cisco, Aruba, Ubiquiti, Juniper, and other major brands, ensuring hassle-free integration into your existing fiber infrastructure.

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LINK-PP LS-SC31551G-20I 1G SFP BiDi 1310nm-TX/1550nm-RX 20km Simplex SC DOM SMF Optical Transceiver Module (Industrial)

Name: LINK-PP LS-SC31551G-20I 1G SFP BiDi 1310nm-TX/1550nm-RX 20km Simplex SC DOM SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 202193
Price: 13.33 USD
Availability: InStock
Rating: 5 (22 reviews)

Product: LINK-PP LS-SC31551G-20I 1G SFP BiDi 1310nm-TX/1550nm-RX 20km Simplex SC DOM SMF Optical Transceiver Module (Industrial)
SKU: 202193
P/N: LS-SC31551G-20I
Price: $ 15.5
Stock: 90 in Stock
Sold: 810
Product URL: https://www.l-p.com/products/491672.htm

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

3 Questions

810 Sold

$ 15.5

Free shipping. For wholesale pricing, please contact us directly.

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$ 14.26

3000

$ 13.795

6000

$ 13.33

Manufacture: LINK-PP P/N: LS-SC31551G-20I SKU: 202193

Compatible:: LINK-PP

Compatible P/N:: LS-SC31551G-03C | 3km; LS-SC31551G-03I | 3km; LS-SC55311G-03C | 3km; LS-SC55311G-03I | 3km; LS-SC31491G-10C | 10km; LS-SC31551G-10C | 10km; LS-SC31551G-10I | 10km; LS-SC49311G-10C | 10km; LS-SC55311G-10C | 10km; LS-SC55311G-10I | 10km; LS-SC31491G-20C | 20km; LS-SC31551G-20C | 20km; LS-SC31551G-20I | 20km; LS-SC49311G-20C | 20km; LS-SC55311G-20C | 20km; LS-SC55311G-20I | 20km; LS-SC31551G-40C | 40km; LS-SC31551G-40I | 40km; LS-SC55311G-40C | 40km; LS-SC55311G-40I | 40km

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Estimated delivery time : 3 - 10 days.

5-Year Warranty 30-Day Returns 30-Day Exchange

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LINK-PP LS-SC31551G-20I 1G BiDi SFP Specifications

The LINK-PP LS-SC31551G-20I is an industrial grade optical transceiver designed for robust Gigabit Ethernet applications. Complying with 1000BASE-BX standards, this 1G BiDi SFP module delivers exceptional reliability in harsh environments. It operates seamlessly across extreme temperatures from -40°C to 85°C, making it an ideal choice for challenging networking deployments.

LINK-PP Part Number	LS-SC31551G-20I	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1310nm-TX/1550nm-RX	Max Cable Distance	20km
Connector	Simplex SC	Media	SMF
Transmitter Type	FP	Receiver Type	PIN
TX Power	-9 to 0dBm	RX Power	-23 to -1dBm
Receiver Sensitivity	-23dBm	Receiver Overload	-3dBm
DOM Support	Yes	Operating Temperature Range	-40 to 85°C

Key Features of LINK-PP LS-SC31551G-20I 1G BiDi SFP

Discover advanced networking solutions with this high-performance single-mode fiber optic module. Utilizing cutting-edge WDM technology, it maximizes bandwidth efficiency by transmitting and receiving data over a single strand of fiber. This ensures highly cost-effective and scalable network infrastructure upgrades for enterprise systems.

LINK-PP LS-SC31551G-20I 1G BiDi SFP Optical Module

This premium gigabit optical module is fully SFP MSA compliant, guaranteeing seamless integration. Equipped with a high-quality FP laser and PIN photodetector, it ensures superior signal integrity for demanding telecommunication networks.

LS-SC31551G-20I: 1G Connectivity for Intelligent Transportation Systems (ITS)

Engineered for rugged networking, this industrial SFP provides flawless communication for smart city infrastructure. It guarantees uninterrupted data flow across Intelligent Transportation Systems, traffic monitoring, and outdoor industrial automation networks.

LS-SC31551G-20I Module with 1310nm-TX and 1550nm-RX Wavelength

Operating with a 1310nm-TX and 1550nm-RX wavelength, this unit enables efficient bi-directional transmission. For establishing a complete communication link, precise Bidi transceiver pairing with a complementary 1550nm-TX module is required.

LS-SC31551G-20I Module Supporting 20km Transmission

Designed for long-reach connectivity, it maintains a stable signal over distances up to 20km. With a robust optical link budget, it perfectly bridges remote campus networks and expansive enterprise facilities effortlessly.

LS-SC31551G-20I Module with Simplex SC Interface

Featuring a standard SC connector SFP design, it ensures secure physical connections. It easily connects with any standard simplex fiber optic patch cord, reducing cabling complexity and minimizing installation space requirements.

LS-SC31551G-20I Module with DOM for Real-Time Monitoring

Incorporating Digital Optical Monitoring compliant with SFF-8472, administrators can track vital operating parameters. This proactive feature enables rapid fault isolation by monitoring temperature, voltage, and laser power in real time.

LINK-PP LS-SC31551G-20I 1G SFP Certification

Meeting strict global compliance standards, this optical transceiver guarantees safe and legal deployment across international markets, ensuring total peace of mind for professional network engineers.

LS-SC31551G-20I Quality Testing Program

Every unit undergoes exhaustive factory quality control before shipment. Our advanced optical component testing ensures consistent performance, maximum durability, and zero defects upon delivery.

LS-SC31551G-20I Quality Certifications

This networking product is fully CE FCC UKCA UL REACH approved. These prestigious safety and environmental credentials proudly demonstrate our unwavering commitment to manufacturing excellence.

LS-SC31551G-20I Certified for Reliable Host-Device Compatibility

Programmed as a multi-vendor compatible SFP, it ensures flawless switch interoperability. It perfectly matches leading industrial routers and ethernet switches without vendor lock-in issues.

Rigorous Testing Ensures Reliable SFP Performance

Comprehensive transceiver validation processes are executed in our labs to guarantee that every module withstands the most demanding network environments.

Rigorous Testing Ensures Reliable Transceiver Performance

Optical Spectrum Test

Verifies precise wavelength stability to prevent crosstalk in complex fiber optic channels.

Eye Pattern Test

Conducts thorough signal integrity analysis to ensure clean, distortion-free data transmission.

Bit Error Rate Test

Confirms absolute data accuracy and guarantees zero packet loss during prolonged operations.

Temperature Test

Evaluates extreme thermal endurance, validating the industrial-grade operating range from -40°C to 85°C.

Product Shipping for LINK-PP LS-SC31551G-20I 1G SFP

We prioritize secure transceiver delivery globally, ensuring your essential networking components arrive safely, quickly, and ready for immediate deployment.

Anti-Static Protective Packaging

Utilizes professional ESD safe packaging to shield sensitive electronic components.

Shock-Resistant Transport Protection

Employs robust cushioning materials for optimal transit damage prevention.

Fast Order Processing and Dispatch

Guarantees quick fulfillment of large industrial orders to meet strict deadlines.

Global Logistics and International Delivery

Leverages a reliable worldwide shipping network for prompt international arrivals.

LINK-PP LS-SC31551G-20I 1G SFP Usage Demonstration

Experience hassle-free network switch deployment with its intuitive plug-and-play installation. Simply insert the module into your device, connect the SC fiber cable, and enjoy instant, high-speed Gigabit connectivity without complex configuration.

LS-SC31551G-20I 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

Professional technical guidance to help customers select the most suitable LS-SC31551G-20I modules based on network architecture and application requirements.

Compatibility Verification Support

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

Deployment & Installation Assistance

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

Long-Term Technical Assurance

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

LINK-PP LS-SC31551G-20I 1G SFP After-Sales Assurance

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

Model Comparison Table

	Current Model LS-SC31551G-20I	LS-SC31551G-10I	LS-SC55311G-03I	LS-SC31551G-40I	LS-SC55311G-20I	LS-SC31551G-20C

Compatible	LINK-PP	LINK-PP	LINK-PP	LINK-PP	LINK-PP	LINK-PP
Data Rate (Max)	1.25Gbps	1.25Gbps	1.25Gbps	1.25Gbps	1.25Gbps	1.25Gbps
Wavelength	1310nm-TX/1550nm-RX	1310nm-TX/1550nm-RX	1550nm-TX/1310nm-RX	1310nm-TX/1550nm-RX	1550nm-TX/1310nm-RX	1310nm-TX/1550nm-RX
Connector	Simplex SC	Simplex SC	Simplex SC	Simplex SC	Simplex SC	Simplex SC
Cable Distance (Max)	20km	10km	3km	40km	20km	20km
Cable Type	SMF	SMF	SMF	SMF	SMF	SMF
TX Power	-9 to 0dBm	-9 to 0dBm	-9 to 0dBm	-9 to 0dBm	-9 to 0dBm	-9 to 0dBm
Receiver Sensitivity	-23dBm	-23dBm	-23dBm	-24dBm	-23dBm	-23dBm
Operating Temperature	-40 to 85°C	-40 to 85°C	-40 to 85°C	-40 to 85°C	-40 to 85°C	0 to 70°C
Form Factor	SFP	SFP	SFP	SFP	SFP	SFP
Transmitter Type	FP	FP	FP	DFB	DFB	FP
Receiver Type	PIN	PIN	PIN	PIN	PIN	PIN
Receiver Overload	-3dBm	-3dBm	-3dBm	-3dBm	-3dBm	-3dBm
DOM Support	Yes	Yes	Yes	Yes	Yes	Yes

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Q: Just to confirm before I buy, does this use a Simplex SC connector, and is it compatible with standard single-mode fiber? By M***n on 2026-06-07

A: Spot on! This module features a Simplex SC optical interface and is fully compatible with standard 9/125碌m Single-Mode Fiber (SMF). Just remember to pair it with a complementary 1550nm-TX/1310nm-RX module on the other end of the 20km link to establish a successful connection! By admin on 2026-06-07
Q: Do these transceivers meet 1000BASE-BX standards and support real-time monitoring for our intelligent transportation network? By J***s on 2026-04-12

A: Yes! The module strictly adheres to 1000BASE-BX protocols and IEEE 802.3z standards. It also features built-in DOM/DDM capabilities compliant with SFF-8472, allowing your sysadmins to monitor optical TX/RX power, voltage, and temperature in real-time. By admin on 2026-04-12
Q: Hi there, I need to mix these with Cisco and Aruba switches in our campus network. Does this LS-SC31551G-20I have any OEM compatibility issues, or is it strictly plug-and-play? By A***s on 2026-03-17

A: Hi! The LS-SC31551G-20I is 100% MSA compliant and offers seamless OEM compatibility. It is rigorously tested for plug-and-play interoperability with Cisco, Aruba, Ubiquiti, Juniper, and other major brands, ensuring hassle-free integration into your existing fiber infrastructure. By admin on 2026-03-17

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B***g

Belgium

Verified Purchase

5 .0

2026-05-02

Flawless 1G SFP! DOM works perfectly.

72 Helpful vote Comments

M***e

Sweden

Verified Purchase

5 .0

2026-04-09

Excellent 1000BASE-BX compliance with zero packet loss.

77 Helpful vote Comments

E***g

Switzerland

Verified Purchase

5 .0

2026-04-04

We deploy these LS-SC31551G-20I modules in unconditioned outdoor NEMA enclosures. Even enduring brutal -40°C winters and summer bakes, the 20km SMF links stay rock solid for our base station backhaul.

137 Helpful vote Comments

A***h

Malaysia

Verified Purchase

5 .0

2026-03-11

Works great for our base station backhaul.

174 Helpful vote Comments

J***s

Spain

Verified Purchase

5 .0

2026-02-25

Deployed these for outdoor cabinets in extreme heat. The 85°C rating is completely legit!

152 Helpful vote Comments

R***s

Netherlands

Verified Purchase

5 .0

2026-02-08

Cheap, reliable 20km transmission. Highly recommended!

186 Helpful vote Comments

N***a

United States

Verified Purchase

5 .0

2025-12-07

Plug and play on my Cisco switches.

204 Helpful vote Comments

L***r

Greece

Verified Purchase

5 .0

2025-11-14

Bulk ordered 50 units for a massive machine room upgrade. The single-strand Simplex SC design saved us a fortune on fiber cabling. DDM stats are incredibly stable under heavy 1.25Gbps loads.

128 Helpful vote Comments

R***z

Switzerland

Verified Purchase

5 .0

2025-10-28

Perfect 1310nm-TX BiDi for data center interconnect.

135 Helpful vote Comments

J***n

Colombia

Verified Purchase

4 .0

2025-10-17

Delivery took a day longer than expected, but the 1G BiDi SFP works flawlessly in outdoor cabinets.

21 Helpful vote Comments

K***k

United States

Verified Purchase

5 .0

2025-10-15

The Simplex SC interface makes cabling so much easier in our tight rack spaces.

91 Helpful vote Comments

N***z

Brazil

Verified Purchase

5 .0

2025-09-28

Survives -40°C. Great industrial 1G SFP! ❄️

52 Helpful vote Comments

J***l

United Kingdom

Verified Purchase

5 .0

2025-09-15

Best budget 1G BiDi for home NAS!

179 Helpful vote Comments

L***z

Ukraine

Verified Purchase

5 .0

2025-09-04

Great for connecting my home NAS to the garage over a single fiber strand!

159 Helpful vote Comments

P***r

Republic of Korea

Verified Purchase

5 .0

2025-08-17

Simplex SC connector clicked right in easily!

183 Helpful vote Comments

L***z

Chile

Verified Purchase

5 .0

2025-08-17

Ran extensive compatibility tests across Cisco, Ubiquiti, and Mikrotik gear. This 1G BiDi SFP (1310nm-TX/1550nm-RX) recognized instantly with full DOM support. Perfect for our new campus fiber ring topology!

169 Helpful vote Comments

B***e

Russian Federation

Verified Purchase

5 .0

2025-08-14

Accurate DDM monitoring. Will definitely buy again.

60 Helpful vote Comments

L***n

Costa Rica

Verified Purchase

5 .0

2025-08-04

Excellent OEM compatibility! Tested this 1310nm/1550nm BiDi on both Juniper and Aruba switches perfectly.

126 Helpful vote Comments

M***k

Viet Nam

Verified Purchase

5 .0

2025-06-25

Used for batch deployment in our data center interconnect. Very cost-effective 1G SFP module.

180 Helpful vote Comments

P***n

Japan

Verified Purchase

5 .0

2025-03-31

DDM readings match our Fluke tests. Outstanding quality for an industrial wide-temp optical module.

195 Helpful vote Comments

J***r

Indonesia

Verified Purchase

5 .0

2025-02-26

Replaced failing OEM optics with these industrial LINK-PP transceivers for our intelligent transportation system. 1000BASE-BX compliance is spot on, ensuring zero downtime for our critical traffic monitoring nodes.

37 Helpful vote Comments

T***e

Italy

Verified Purchase

5 .0

2025-02-25

Solid industrial transceiver for campus fiber networks.

167 Helpful vote Comments

Verified Purchase

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$ 9.5 ~~$ 0.00~~

{"pid":491667,"minimum_ordered_quantity":1,"skulist":[{"pskuid":202188,"cid":752,"pid":491667,"sku":"202188","psvid1":282589,"psvid2":282590,"psvid3":0,"psvid4":0,"left_num":220,"price":"9.500","strike_price":"0.000","innercode":"","addtime":"2025-11-18 09:30:22","uptime":"2025-11-18 22:30:22","status":0}],"shippingLists":[{"id":"FedEx","name":"FedEx","logo":"res\/shipping\/FEDEX.jpg","price":"0","isfree":0,"total":"0","tax":"","datemin":"3","datemax":"10","unit_price":"9.5","subtotal":9.5}]}
LINK-PP

LS-SC31491G-20C | 20km

LINK-PP LS-SC31491G-20C 1G SFP BiDi 1310nm-TX/1490nm-RX 20km Simplex SC DOM SMF Optical Transceiver Module

51 Reviews
|
790 Sold

$ 8.5 ~~$ 0.00~~

{"pid":489587,"minimum_ordered_quantity":1,"skulist":[{"pskuid":199260,"cid":752,"pid":489587,"sku":"199260","psvid1":280399,"psvid2":280400,"psvid3":0,"psvid4":0,"left_num":310,"price":"8.500","strike_price":"0.000","innercode":"","addtime":"2025-06-30 13:49:27","uptime":"2025-07-01 02:49:27","status":0}],"shippingLists":[{"id":"FedEx","name":"FedEx","logo":"res\/shipping\/FEDEX.jpg","price":"0","isfree":0,"total":"0","tax":"","datemin":"3","datemax":"10","unit_price":"8.5","subtotal":8.5}]}
LINK-PP

LS-SC49311G-20C | 20km

LINK-PP LS-SC49311G-20C 1G SFP BiDi 1490nm-TX/1310nm-RX 20km Simplex SC DOM SMF Optical Transceiver Module

45 Reviews
|
920 Sold

$ 8.5 ~~$ 0.00~~

{"pid":489586,"minimum_ordered_quantity":1,"skulist":[{"pskuid":199259,"cid":752,"pid":489586,"sku":"199259","psvid1":280397,"psvid2":280398,"psvid3":0,"psvid4":0,"left_num":180,"price":"8.500","strike_price":"0.000","innercode":"","addtime":"2025-06-30 13:39:06","uptime":"2025-07-01 02:39:06","status":0}],"shippingLists":[{"id":"FedEx","name":"FedEx","logo":"res\/shipping\/FEDEX.jpg","price":"0","isfree":0,"total":"0","tax":"","datemin":"3","datemax":"10","unit_price":"8.5","subtotal":8.5}]}
LINK-PP

LS-SC49311G-10C | 10km

LINK-PP LS-SC49311G-10C 1G SFP BiDi 1490nm-TX/1310nm-RX 10km Simplex SC DOM SMF Optical Transceiver Module

23 Reviews
|
710 Sold

$ 8.2 ~~$ 0.00~~

{"pid":493477,"minimum_ordered_quantity":1,"skulist":[{"pskuid":204037,"cid":752,"pid":493477,"sku":"204037","psvid1":286205,"psvid2":286206,"psvid3":0,"psvid4":0,"left_num":190,"price":"8.200","strike_price":"0.000","innercode":"","addtime":"2026-06-02 22:55:49","uptime":"2026-06-02 22:55:49","status":0}],"shippingLists":[{"id":"FedEx","name":"FedEx","logo":"res\/shipping\/FEDEX.jpg","price":"0","isfree":0,"total":"0","tax":"","datemin":"3","datemax":"10","unit_price":"8.2","subtotal":8.2}]}
LINK-PP

LS-SC31491G-10C | 10km

LINK-PP LS-SC31491G-10C 1G SFP BiDi 1310nm-TX/1490nm-RX 10km Simplex LC DOM SMF Optical Transceiver Module

22 Reviews
|
710 Sold

$ 8.2 ~~$ 0.00~~

{"pid":493476,"minimum_ordered_quantity":1,"skulist":[{"pskuid":204036,"cid":752,"pid":493476,"sku":"204036","psvid1":286203,"psvid2":286204,"psvid3":0,"psvid4":0,"left_num":190,"price":"8.200","strike_price":"0.000","innercode":"","addtime":"2026-06-02 22:48:04","uptime":"2026-06-02 22:48:04","status":0}],"shippingLists":[{"id":"FedEx","name":"FedEx","logo":"res\/shipping\/FEDEX.jpg","price":"0","isfree":0,"total":"0","tax":"","datemin":"3","datemax":"10","unit_price":"8.2","subtotal":8.2}]}
Ubiquiti

UACC-OM-SM-1G-S | 3km

Ubiquiti UACC-OM-SM-1G-S Compatible LINK-PP 1G SFP BiDi 1310nm-TX/1550nm-RX 3km Simplex LC DOM SMF Optical Transceiver Module

15 Reviews
|
1.9K Sold

$ 6.5 ~~$ 0.00~~

{"pid":496401,"minimum_ordered_quantity":1,"skulist":[{"pskuid":220167,"cid":752,"pid":496401,"sku":"220167","psvid1":319962,"psvid2":319963,"psvid3":0,"psvid4":0,"left_num":975,"price":"6.500","strike_price":"0.000","innercode":"","addtime":"2026-07-31 23:15:12","uptime":"2026-07-31 23:15:12","status":0}],"shippingLists":[{"id":"FedEx","name":"FedEx","logo":"res\/shipping\/FEDEX.jpg","price":"0","isfree":0,"total":"0","tax":"","datemin":"3","datemax":"10","unit_price":"6.5","subtotal":6.5}]}

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LINK-PP LS-SC31551G-20I 1G SFP BiDi 1310nm-TX/1550nm-RX 20km Simplex SC DOM SMF Optical Transceiver Module (Industrial)

Product summary

Product Details

LINK-PP LS-SC31551G-20I 1G BiDi SFP Specifications

Key Features of LINK-PP LS-SC31551G-20I 1G BiDi SFP

LINK-PP LS-SC31551G-20I 1G BiDi SFP Optical Module

LS-SC31551G-20I: 1G Connectivity for Intelligent Transportation Systems (ITS)

LS-SC31551G-20I Module with 1310nm-TX and 1550nm-RX Wavelength

LS-SC31551G-20I Module Supporting 20km Transmission

LS-SC31551G-20I Module with Simplex SC Interface

LS-SC31551G-20I Module with DOM for Real-Time Monitoring

LINK-PP LS-SC31551G-20I 1G SFP Certification

LS-SC31551G-20I Quality Testing Program

LS-SC31551G-20I Quality Certifications

LS-SC31551G-20I Certified for Reliable Host-Device Compatibility

Rigorous Testing Ensures Reliable SFP Performance

Optical Spectrum Test

Eye Pattern Test

Bit Error Rate Test

Temperature Test

Product Shipping for LINK-PP LS-SC31551G-20I 1G SFP

Anti-Static Protective Packaging

Shock-Resistant Transport Protection

Fast Order Processing and Dispatch

Global Logistics and International Delivery

LINK-PP LS-SC31551G-20I 1G SFP Usage Demonstration

LS-SC31551G-20I Technical Support

Pre-Sales Technical Consultation

Compatibility Verification Support

Deployment & Installation Assistance

Long-Term Technical Assurance

LINK-PP LS-SC31551G-20I 1G SFP After-Sales Assurance

Model Comparison Table

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LINK-PP LS-SC31551G-20I 1G SFP BiDi 1310nm-TX/1550nm-RX 20km Simplex SC DOM SMF Optical Transceiver Module (Industrial)

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