Are these modules fully compatible with Cisco Catalyst and Ubiquiti EdgeSwitches without throwing "unsupported transceiver" errors?

Yes, absolutely! The LS-BL31551G-20I offers excellent Link-PP SFP compatibility. It is 100% MSA compliant and seamlessly interoperates with major OEM brands like Cisco, Ubiquiti, Juniper, and Huawei without generating unsupported module warnings in your CLI.

Does this transceiver meet the standard safety and communication protocols required for enterprise deployment?

Yes. It strictly complies with the SFP MSA (Multi-Source Agreement) and SFF-8472 technical specifications. It supports Fast Ethernet and Gigabit Fibre Channel protocols, and includes Class I laser safety certification, making it fully compliant for rigorous telecom and enterprise environments.

We are looking to deploy these in 200+ outdoor cabinets. Do you offer volume discounts for batch orders?

We certainly do. For bulk deployments like smart city infrastructure, base station rollouts, or campus networking projects, we provide tiered B2B pricing to help optimize your hardware budget. Please contact our sales team directly for a customized quote on high-volume purchases.

Is this 1G BiDi SFP module designed for multi-mode or single-mode fiber, and what is the max reliable distance?

This module is designed exclusively for Single-Mode Fiber (SMF) using a Simplex LC connector. It supports reliable data transmission with highly sensitive PIN receivers for distances up to 20km, which is ideal for linking remote edge facilities or spanning large industrial campuses.

Breadcrumb: Home; Products; Optics Transceivers | SFP Modules; 1/2/4G Transceiver Modules; 1G BiDi SFP; 181240

Click to open expanded view

LINK-PP LS-BL31551G-20I 1G SFP BiDi 1310nm-TX/1550nm-RX 20km Simplex LC DOM SMF Optical Transceiver Module (Industrial)

Name: LINK-PP LS-BL31551G-20I 1G SFP BiDi 1310nm-TX/1550nm-RX 20km Simplex LC DOM SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 181240
Price: 12.9 USD
Availability: InStock
Rating: 4.9 (36 reviews)

# 181240

Product: LINK-PP LS-BL31551G-20I 1G SFP BiDi 1310nm-TX/1550nm-RX 20km Simplex LC DOM SMF Optical Transceiver Module (Industrial)
SKU: 181240
P/N: LS-BL31551G-20I
Price: $ 15
Stock: 435 in Stock
Sold: 955
Product URL: https://www.l-p.com/products/476207.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

36 Reviews

4 Questions

Request Stock

955 Sold

$ 15

Free shipping over $600, If you need a more favorable price, please contact us directly.

Qty (pcs) :

Unit Price :

$ 15

100

$ 14.25

1000

$ 13.8

3000

$ 13.35

6000

$ 12.9

Manufacture: LINK-PP

P/N: LS-BL31551G-20I

Compatible:: LINK-PP; Dahua

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:

To Be Negotiated

Free Shipping

Can't deliver

to United States via {{now_chooseship?now_chooseship.name:''}}

Estimated delivery time : {{now_chooseship?now_chooseship.datemin:''}}-{{now_chooseship?now_chooseship.datemax:''}} days. See details

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

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}} )

undeliverable

Total Price:

{{ 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}}

Add to wish

Specifications

Specification
Videos
Matching Products
Download
Q&A
Customer Reviews

LINK-PP LS-BL31551G-20I 1G BiDi SFP Specifications

The LINK-PP LS-BL31551G-20I is a high-performance 1.25Gbps SFP BiDi transceiver designed for single-mode fiber optical links. Operating with a single 3.3V power supply, this hot-pluggable SFP footprint module ensures seamless integration and reliable data transmission. It complies strictly with SFP MSA and SFF-8472 technical specifications to meet international industry standards.

LINK-PP Part Number	LS-BL31551G-20I	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1310nm-TX/1550nm-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	-40 to 85°C	Protocols	Fast Ethernet, Gigabit Fibre Channel, MSA Compliant

Videos

Matching Products

Pictures

ID#

Description

Price

Stock

Add to Cart

Download

Product Drawing

PDF
LS-BL31551G-20I.pdf

Questions & Answers
Ask a Question

No data

Q: Are these modules fully compatible with Cisco Catalyst and Ubiquiti EdgeSwitches without throwing "unsupported transceiver" errors? By D***s on 2026-04-19

A: Yes, absolutely! The LS-BL31551G-20I offers excellent Link-PP SFP compatibility. It is 100% MSA compliant and seamlessly interoperates with major OEM brands like Cisco, Ubiquiti, Juniper, and Huawei without generating unsupported module warnings in your CLI. By admin on 2026-04-19
Q: Does this transceiver meet the standard safety and communication protocols required for enterprise deployment? By D***r on 2025-10-02

A: Yes. It strictly complies with the SFP MSA (Multi-Source Agreement) and SFF-8472 technical specifications. It supports Fast Ethernet and Gigabit Fibre Channel protocols, and includes Class I laser safety certification, making it fully compliant for rigorous telecom and enterprise environments. By admin on 2025-10-02
Q: We are looking to deploy these in 200+ outdoor cabinets. Do you offer volume discounts for batch orders? By M***g on 2025-03-19

A: We certainly do. For bulk deployments like smart city infrastructure, base station rollouts, or campus networking projects, we provide tiered B2B pricing to help optimize your hardware budget. Please contact our sales team directly for a customized quote on high-volume purchases. By admin on 2025-03-19
Q: Is this 1G BiDi SFP module designed for multi-mode or single-mode fiber, and what is the max reliable distance? By A***n on 2025-01-02

A: This module is designed exclusively for Single-Mode Fiber (SMF) using a Simplex LC connector. It supports reliable data transmission with highly sensitive PIN receivers for distances up to 20km, which is ideal for linking remote edge facilities or spanning large industrial campuses. By admin on 2025-01-02

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}}%

All Reviews ({{comment.star_num?comment.star_num:comment.count}})

All Reviews

5 stars only

4 stars only

3 stars only

2 stars only

1 star only
Reviews with Pictures ( {{comment.pic_comment}} )
See All Reviews

No data

S***a

Norway

Verified Purchase

5 .0

2026-03-04

Simplex LC optical transceiver saves fiber strands.

41 Helpful vote Comments

C***g

Brazil

Verified Purchase

5 .0

2026-03-01

Great 1G BiDi SFP module for outdoor cabinets! ☀️

123 Helpful vote Comments

B***n

Costa Rica

Verified Purchase

5 .0

2026-01-10

Awesome DDM network module, highly recommended.

124 Helpful vote Comments

C***z

Mexico

Verified Purchase

5 .0

2025-12-27

Impressive TX/RX signal levels on the DOM readout. Very reliable industrial SFP transceiver.

55 Helpful vote Comments

K***r

India

Verified Purchase

5 .0

2025-10-21

Upgraded our manufacturing plant's switches using these simplex LC optical transceivers. Splicing just one fiber per link saved us huge on cabling costs. DDM network module features make remote troubleshooting a breeze!

159 Helpful vote Comments

J***e

Indonesia

Verified Purchase

5 .0

2025-10-04

Good gigabit fiber channel link over 12km. Fast Ethernet protocol negotiation was instant! ⚡

159 Helpful vote Comments

C***n

Ecuador

Verified Purchase

5 .0

2025-09-01

Survived extreme cold in our outdoor enclosure! ❄️

65 Helpful vote Comments

K***g

Netherlands

Verified Purchase

5 .0

2025-06-24

Tested this 20km single-mode fiber SFP against Cisco and Juniper gear in our campus fiber network. Flawless OEM compatibility and the 1310nm/1550nm split works perfectly on a single strand.

105 Helpful vote Comments

N***n

Taiwan, Province of China

Verified Purchase

5 .0

2025-06-16

20km single-mode fiber SFP linked up instantly.

45 Helpful vote Comments

K***n

Switzerland

Verified Purchase

5 .0

2025-06-15

Excellent industrial temperature optical module. Works great!

86 Helpful vote Comments

M***r

Thailand

Verified Purchase

5 .0

2025-06-14

Solid 1G connection at 15km distance. :-)

211 Helpful vote Comments

S***z

Ireland

Verified Purchase

5 .0

2025-06-10

Ordered a batch of 50 for a smart city outdoor cabinet deployment. The 1G BiDi SFP module handles the 15km run with excellent RX sensitivity. Truly an enterprise-grade industrial SFP transceiver.

167 Helpful vote Comments

J***n

United Kingdom

Verified Purchase

5 .0

2025-06-09

Awesome Link-PP SFP compatibility. Plugged it into my Ubiquiti edge router without issues.

218 Helpful vote Comments

S***t

Brazil

Verified Purchase

5 .0

2025-06-06

Perfect Link-PP SFP compatibility out the box!

86 Helpful vote Comments

A***n

Thailand

Verified Purchase

5 .0

2025-05-28

DOM features work perfectly on my switch.

69 Helpful vote Comments

P***n

Dominican Republic

Verified Purchase

5 .0

2025-04-12

Deployed these industrial temperature optical modules in our outdoor base station backhaul. The -40 to 85°C rating is legit! No link drops during freezing nights, and DOM stats look solid via CLI.

212 Helpful vote Comments

K***t

Costa Rica

Verified Purchase

5 .0

2025-03-10

Perfect 20km single-mode fiber SFP for our campus networking needs. Great value!

116 Helpful vote Comments

D***s

Viet Nam

Verified Purchase

5 .0

2025-01-20

Plug and play industrial SFP transceiver.

166 Helpful vote Comments

A***n

Belgium

Verified Purchase

4 .0

2025-01-11

Good industrial SFP transceiver, though delivery took a day longer than the tracking said. :-(

170 Helpful vote Comments

L***n

Argentina

Verified Purchase

5 .0

2024-12-27

Rock solid industrial temperature optical module for our traffic camera cabinets. No heat issues.

53 Helpful vote Comments

N***z

Bolivia

Verified Purchase

5 .0

2024-12-26

The simplex LC optical transceiver linked up instantly with our existing Huawei switches.

187 Helpful vote Comments

W***l

Russian Federation

Verified Purchase

5 .0

2024-11-29

Using this 1G BiDi SFP module for my home 1G NAS setup. Runs cool.

176 Helpful vote Comments

O***e

Philippines

Verified Purchase

5 .0

2024-06-30

l-p.com provided excellent customer service again and helped us to get what we were looking for.

54 Helpful vote Comments

R***y

Iran, Islamic Republic of

Verified Purchase

4 .0

2024-04-17

I asked for live support on what to choose Optical Transceiver Module. After collecting the info, they arrange a professional sales to me. I received the products last week. After a week’s test, everything goes smoothly. I believe I will purchase from l-p.com again next month.

91 Helpful vote Comments

N***a

Japan

Verified Purchase

5 .0

2024-04-14

I interacted with their online chat and asked many question to ensure I can get the right one. They helped me pick the perfect module for me while weighing several options. I got the product I wanted and additional knowhow.

79 Helpful vote Comments

J***d

United States

Verified Purchase

5 .0

2024-01-18

Brilliant and easy way to select the most suitable Transceiver Modules for my Switches.

77 Helpful vote Comments

B***s

Netherlands

Verified Purchase

5 .0

2023-11-14

Great Seller. Package arrived in good condition. Thanks.

63 Helpful vote Comments

M***r

United States

Verified Purchase

5 .0

2023-11-12

Easy online ordering, good price, Timely delivery, Quality product, installed and working properly. What more can I say

82 Helpful vote Comments

N***d

Cambodia

Verified Purchase

5 .0

2023-11-11

Good 10/25/40G Transceiver Modules. Do what they are supposed to be used.

58 Helpful vote Comments

S***e

Turkey

Verified Purchase

5 .0

2023-10-20

Easy to use website and prompt delivery.

25 Helpful vote Comments

W***y

South Africa

Verified Purchase

5 .0

2023-09-10

This order was shipped very quickly and arrived in excellent order without any issues.

36 Helpful vote Comments

H***e

Germany

Verified Purchase

5 .0

2023-08-28

Fast delivery, wide selection of goods

49 Helpful vote Comments

K***H

Netherlands

Verified Purchase

5 .0

2023-05-27

Works as advertised and as expected.

45 Helpful vote Comments

A***a

United States

Verified Purchase

5 .0

2023-05-16

The customer service is very friendly and helpful. I highly recommend LINK-PP to everyone.

8 Helpful vote Comments

J***n

Bangladesh

Verified Purchase

5 .0

2023-04-17

Was contacted by their sales department, and product arrived quickly!

48 Helpful vote Comments

S***c

United States

Verified Purchase

5 .0

2023-04-08

Actually, your shop is the only place I’ve found so far, where one could buy less than 100 of these Transceiver Modules, and it could be very handy for many hobbyists like me.

50 Helpful vote Comments