We've had major delays with other vendors lately. What’s your typical lead time for a mid-sized deployment of these 40km optical transceivers?

We maintain large local inventories of the LS-BL31551G-40I. Orders under 1,000 units usually ship within 3 days. For larger rollouts, our supply chain is highly stable with lead times rarely exceeding a few days to a week.

We are running a mix of Cisco Catalyst and Mikrotik switches. Are these MSA compliant transceivers fully plug-and-play without triggering unsupported OEM errors?

Yes! The LS-BL31551G-40I is 100% MSA compliant. We regularly deploy and test them on Cisco, MikroTik, Ubiquiti, and Aruba gear with flawless DOM readout and zero proprietary lock-out issues.

I need to outfit a new ISP backbone and require around 200 units. Do you offer volume discounts for bulk B2B purchases?

Absolutely. While single units are highly cost-effective, we offer tiered pricing for bulk orders. For a batch of 200 pieces, you'll see a significant drop in unit price. Just hit up our sales team via live chat or email for a custom quote.

Does this module require an LC Simplex patch cable, and must it be OS2 single-mode fiber?

That is correct. You will need a Simplex LC connector and standard 9/125碌m Single-Mode Fiber (OS1 or OS2). The high-sensitivity PIN receiver and DFB laser easily support up to 40km transmission distances over this fiber type.

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LINK-PP LS-BL31551G-40I 1G SFP BiDi 1310nm-TX/1550nm-RX 40km Simplex LC DOM SMF Optical Transceiver Module (Industrial)

Name: LINK-PP LS-BL31551G-40I 1G SFP BiDi 1310nm-TX/1550nm-RX 40km Simplex LC DOM SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 181244
Price: 6.751 USD
Availability: InStock
Rating: 4.9 (37 reviews)

# 181244

Product: LINK-PP LS-BL31551G-40I 1G SFP BiDi 1310nm-TX/1550nm-RX 40km Simplex LC DOM SMF Optical Transceiver Module (Industrial)
SKU: 181244
P/N: LS-BL31551G-40I
Price: $ 7.85
Stock: 830 in Stock
Sold: 720
Product URL: https://www.l-p.com/products/476211.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

37 Reviews

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$ 7.458

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$ 7.222

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Manufacture: LINK-PP

P/N: LS-BL31551G-40I

Compatible:: LINK-PP

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

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LINK-PP LS-BL31551G-40I 1G BiDi SFP Specifications

The LINK-PP LS-BL31551G-40I is an industrial-grade 1G BiDi SFP optical transceiver designed for high-performance Gigabit Ethernet and Fiber Channel links. This hot-pluggable module delivers robust fiber optic connectivity over a single-mode fiber, utilizing advanced WDM technology to maximize bandwidth efficiency while operating reliably across extreme industrial temperatures ranging from -40°C to 85°C.

LINK-PP Part Number	LS-BL31551G-40I	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1310nm-TX/1550nm-RX	Max Cable Distance	40km
Connector	Simplex LC	Media	SMF
Transmitter Type	DFB	Receiver Type	PIN
TX Power	-5 to 0dBm	RX Power	-23 to -1dBm
Receiver Sensitivity	<-24dBm	DOM Support	Yes
Operating Temperature Range	-40 to 85°C	Protocols	Fast Ethernet, Gigabit Fibre Channel, MSA Compliant

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Q: We've had major delays with other vendors lately. What’s your typical lead time for a mid-sized deployment of these 40km optical transceivers? By S***z on 2025-08-29

A: We maintain large local inventories of the LS-BL31551G-40I. Orders under 1,000 units usually ship within 3 days. For larger rollouts, our supply chain is highly stable with lead times rarely exceeding a few days to a week. By admin on 2025-08-29
Q: We are running a mix of Cisco Catalyst and Mikrotik switches. Are these MSA compliant transceivers fully plug-and-play without triggering unsupported OEM errors? By S***n on 2025-07-25

A: Yes! The LS-BL31551G-40I is 100% MSA compliant. We regularly deploy and test them on Cisco, MikroTik, Ubiquiti, and Aruba gear with flawless DOM readout and zero proprietary lock-out issues. By admin on 2025-07-25
Q: I need to outfit a new ISP backbone and require around 200 units. Do you offer volume discounts for bulk B2B purchases? By C***n on 2025-05-20

A: Absolutely. While single units are highly cost-effective, we offer tiered pricing for bulk orders. For a batch of 200 pieces, you'll see a significant drop in unit price. Just hit up our sales team via live chat or email for a custom quote. By admin on 2025-05-20
Q: Does this module require an LC Simplex patch cable, and must it be OS2 single-mode fiber? By E***l on 2025-05-11

A: That is correct. You will need a Simplex LC connector and standard 9/125碌m Single-Mode Fiber (OS1 or OS2). The high-sensitivity PIN receiver and DFB laser easily support up to 40km transmission distances over this fiber type. By admin on 2025-05-11

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B***s

Venezuela

Verified Purchase

4 .0

2026-06-12

Box was slightly crushed upon arrival, but the industrial SFP module works perfectly.

215 Helpful vote Comments

D***h

France

Verified Purchase

5 .0

2026-06-05

Solid 1G SFP BiDi performance for our FTTH rollout. Great budget saver!

148 Helpful vote Comments

T***r

Thailand

Verified Purchase

5 .0

2026-06-01

Works perfectly for remote IP camera backhaul.

207 Helpful vote Comments

J***s

Denmark

Verified Purchase

5 .0

2026-05-23

Runs cool even in non-vented outdoor enclosures. Genuine industrial SFP module.

174 Helpful vote Comments

M***n

Czech Republic

Verified Purchase

5 .0

2026-05-22

Bought a batch for enterprise NAS to remote switch links. The DOM support gives real-time RX power stats. Zero compatibility issues with Ubiquiti and MikroTik gear. Solid 40km reach on single-mode fiber!

59 Helpful vote Comments

S***s

France

Verified Purchase

5 .0

2026-05-22

Reliable MSA compatible transceiver. Handled -20°C in our cell tower cabinet easily.

48 Helpful vote Comments

P***n

Saudi Arabia

Verified Purchase

5 .0

2026-05-13

Best Simplex LC 1G module for price.

201 Helpful vote Comments

D***n

Ireland

Verified Purchase

5 .0

2026-05-10

A+ industrial SFP module. Fast delivery.

199 Helpful vote Comments

E***s

Belgium

Verified Purchase

5 .0

2026-04-24

Plug and play with my Aruba switches. 40km optical transceiver does the job.

50 Helpful vote Comments

S***s

Saudi Arabia

Verified Purchase

5 .0

2026-04-18

Flawless DOM support on my EdgeRouter!

173 Helpful vote Comments

J***s

Kuwait

Verified Purchase

5 .0

2026-04-09

Perfect for expanding our campus network without pulling new OS2 single-mode fiber.

167 Helpful vote Comments

R***n

Russian Federation

Verified Purchase

5 .0

2026-03-18

No CRC errors on our 30km point-to-point link. Top tier 1310nm 1550nm WDM optics.

199 Helpful vote Comments

L***n

Ecuador

Verified Purchase

4 .0

2026-03-15

Delayed by customs for two days, though the 40km optical transceiver itself is flawless.

60 Helpful vote Comments

C***e

Italy

Verified Purchase

5 .0

2026-03-04

Saves fiber strands with 1G SFP BiDi.

162 Helpful vote Comments

M***t

Spain

Verified Purchase

5 .0

2026-03-01

Deployed these 1G SFP BiDi modules in our outdoor cabinets across the campus fiber network. The -40 to 85°C industrial temp rating is legit, surviving harsh winters. Flawless DOM monitoring via our Cisco switches!

128 Helpful vote Comments

E***s

Panama

Verified Purchase

5 .0

2026-02-19

Fast shipping for our data center maintenance. DOM features work as advertised.

123 Helpful vote Comments

D***s

Spain

Verified Purchase

5 .0

2026-01-14

Tested the MSA compatible LS-BL31551G-40I extensively in our lab. Perfect DDM readouts and zero packet loss over a 35km OS2 spool. Integrating these for our client's smart grid distribution automation flawlessly. ⚡

49 Helpful vote Comments

W***k

Mexico

Verified Purchase

5 .0

2026-01-10

Stable 40km optical transceiver. Zero downtime.

65 Helpful vote Comments

L***n

Switzerland

Verified Purchase

5 .0

2025-12-07

No compatibility issues with my Juniper gear.

150 Helpful vote Comments

J***s

Peru

Verified Purchase

5 .0

2025-11-19

Solid link over 25km SMF. Highly recommended.

92 Helpful vote Comments

N***n

Sweden

Verified Purchase

5 .0

2025-11-16

True -40 to 85°C industrial temp rating.

75 Helpful vote Comments

D***n

Czech Republic

Verified Purchase

5 .0

2025-11-05

Exactly what our machine vision network needed!

150 Helpful vote Comments

M***l

Spain

Verified Purchase

5 .0

2025-10-27

Excellent total cost of ownership! We replaced legacy dual-fiber links with this Simplex LC 1G transceiver. The 1310nm-TX/1550nm-RX WDM tech saved us from laying new SMF cables for our base station backhaul project.

87 Helpful vote Comments

E***z

Ireland

Verified Purchase

5 .0

2025-10-24

The Simplex LC connector snaps perfectly. Single strand fiber saves so much hassle!

54 Helpful vote Comments

M***e

Costa Rica

Verified Purchase

5 .0

2025-10-17

Perfect DFB laser Tx and PIN Rx!

76 Helpful vote Comments

A***v

Libyan Arab Jamahiriya

Verified Purchase

5 .0

2024-05-31

I am satisfied with both service and price, your site is good in both aspects and with Fast shipping.

22 Helpful vote Comments

S***y

United States

Verified Purchase

5 .0

2024-05-19

Part arrived within 15 days and was exactly as described. I was very satisfied.

43 Helpful vote Comments

C***s

Austria

Verified Purchase

5 .0

2024-02-28

l-p.com has great prices, the seller was very friendly and knowledgeable. I would do business anywhere else.

69 Helpful vote Comments

S***n

Japan

Verified Purchase

5 .0

2024-01-16

We received exceptional help from the team at l-p.com when we have questions about the items we received.

33 Helpful vote Comments

R***a

Canada

Verified Purchase

5 .0

2023-11-27

l-p.com was based on their product quality, coupled with good service and price, which won the praise of our company.

104 Helpful vote Comments

E***e

Turkey

Verified Purchase

5 .0

2023-07-03

Right product that is compatible with my switches; Fast delivery.

58 Helpful vote Comments

E***i

Belarus

Verified Purchase

5 .0

2023-06-30

I'm satisfied with the price, more surprisingly, the quality is better than I imagined. l-p.com, I will do more business with you in the future~

100 Helpful vote Comments

J***a

Bulgaria

Verified Purchase

5 .0

2023-06-26

Every interaction was positive, from the ordering to shipping. Fast response time and great customer service throughout!

86 Helpful vote Comments

T***r

Spain

Verified Purchase

5 .0

2023-06-16

It was easy site to navigate and my products delivered Fast.

61 Helpful vote Comments

B***g

Lithuania

Verified Purchase

5 .0

2023-05-17

The prices were extremely reasonable and there was a huge range of products to chose from.

55 Helpful vote Comments

J***r

Macao

Verified Purchase

5 .0

2023-03-11

It was exactly what we needed and delivered in a short amount of time!

12 Helpful vote Comments

R***y

Republic of Korea

Verified Purchase

5 .0

2023-03-02

From ordering, via phone or their excellent website, to customer service after the sale, l-p.com is top notch in every aspect. I have been dealing with them for 3 years now and have not had a single issue with the company or any of the highly experienced staff I've interacted with.

121 Helpful vote Comments