This module operates at 0 to 70°C, but we need optics for outdoor cabinets in harsh winters. Do you have an industrial wide-temperature version of this 40km BiDi SFP?

Yes, we do! For extreme environments, we manufacture an industrial-grade version (model LS-BL55311G-40I) which operates flawlessly in temperatures ranging from -40°C to 85°C. It is perfectly suited for cell tower backhaul and unconditioned outdoor enclosures.

We run a mixed environment with Cisco Catalyst and Juniper EX series switches. Will this LS-BL55311G-40C module require any special CLI commands to bypass vendor lock-in?

No special CLI commands are needed. This 1G BiDi SFP is strictly MSA compliant and rigorously tested for seamless interoperability across major network equipment brands, including Cisco and Juniper, providing a true plug-and-play experience.

I want to upgrade our legacy network. Can I use OM3 multimode fiber with this specific 1G optic, or is it strictly for single-mode fiber?

This LS-BL55311G-40C module is designed specifically for Single Mode Fiber (SMF) to reliably achieve the 40km transmission distance. Using multimode fiber like OM3 is not recommended, as it will cause severe modal dispersion and drastically reduce your link distance.

I'm planning a data center mass deployment and need about 1K units. Do you offer any tiered discounts for bulk purchasing on these 40km SMF optics?

Absolutely! We offer highly competitive tiered pricing for bulk B2B procurement. For an order of 1K units, our per-unit cost drops significantly compared to the standard retail price. Please contact our sales team directly to lock in your discount.

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LINK-PP LS-BL55311G-40C 1G SFP BiDi 1550nm-TX/1310nm-RX 40km Simplex LC DOM SMF Optical Transceiver Module

Name: LINK-PP LS-BL55311G-40C 1G SFP BiDi 1550nm-TX/1310nm-RX 40km Simplex LC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 181518
Price: 7.31 USD
Availability: InStock
Rating: 5 (40 reviews)

# 181518

Product: LINK-PP LS-BL55311G-40C 1G SFP BiDi 1550nm-TX/1310nm-RX 40km Simplex LC DOM SMF Optical Transceiver Module
SKU: 181518
P/N: LS-BL55311G-40C
Price: $ 8.5
Stock: 1379 in Stock
Sold: 1.7K
Product URL: https://www.l-p.com/products/476694.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

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$ 8.5

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Manufacture: LINK-PP

P/N: LS-BL55311G-40C

Compatible:: Cisco; LINK-PP; Brocade; D-Link; FS; Generic; H3C; Juniper; Netgear; TRENDnet

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-BL55311G-40C 1G BiDi SFP Specifications

The LINK-PP LS-BL55311G-40C is a high-performance 1G BiDi SFP optical transceiver designed for robust Gigabit Ethernet links. Operating on a simplex LC fiber interface, this single-mode module utilizes 1550nm-TX and 1310nm-RX wavelengths to achieve reliable data transmission up to 40km. It strictly complies with SFP MSA standard specifications.

LINK-PP Part Number	LS-BL55311G-40C	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1550nm-TX/1310nm-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	0 to 70°C	Protocols	Fast Ethernet, Gigabit Fibre Channel, MSA Compliant

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Q: This module operates at 0 to 70°C, but we need optics for outdoor cabinets in harsh winters. Do you have an industrial wide-temperature version of this 40km BiDi SFP? By L***n on 2026-02-23

A: Yes, we do! For extreme environments, we manufacture an industrial-grade version (model LS-BL55311G-40I) which operates flawlessly in temperatures ranging from -40°C to 85°C. It is perfectly suited for cell tower backhaul and unconditioned outdoor enclosures. By admin on 2026-02-23
Q: We run a mixed environment with Cisco Catalyst and Juniper EX series switches. Will this LS-BL55311G-40C module require any special CLI commands to bypass vendor lock-in? By D***n on 2025-10-09

A: No special CLI commands are needed. This 1G BiDi SFP is strictly MSA compliant and rigorously tested for seamless interoperability across major network equipment brands, including Cisco and Juniper, providing a true plug-and-play experience. By admin on 2025-10-09
Q: I want to upgrade our legacy network. Can I use OM3 multimode fiber with this specific 1G optic, or is it strictly for single-mode fiber? By R***s on 2025-08-04

A: This LS-BL55311G-40C module is designed specifically for Single Mode Fiber (SMF) to reliably achieve the 40km transmission distance. Using multimode fiber like OM3 is not recommended, as it will cause severe modal dispersion and drastically reduce your link distance. By admin on 2025-08-04
Q: I'm planning a data center mass deployment and need about 1K units. Do you offer any tiered discounts for bulk purchasing on these 40km SMF optics? By S***z on 2025-02-05

A: Absolutely! We offer highly competitive tiered pricing for bulk B2B procurement. For an order of 1K units, our per-unit cost drops significantly compared to the standard retail price. Please contact our sales team directly to lock in your discount. By admin on 2025-02-06

Customer Reviews
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S***s

Venezuela

Verified Purchase

5 .0

2026-05-29

Great budget SMF module for NAS.

84 Helpful vote Comments

K***n

Ukraine

Verified Purchase

5 .0

2026-05-10

Fantastic Link-PP optic! It paired with our Brocade network adapters without any CLI errors.

161 Helpful vote Comments

W***a

Germany

Verified Purchase

5 .0

2026-03-18

Perfect 40km transmission distance on SMF. Excellent optical transceiver for our enterprise access.

122 Helpful vote Comments

M***e

Switzerland

Verified Purchase

4 .0

2026-03-01

Arrived a day late but the 1G BiDi module works flawlessly on Cisco.

48 Helpful vote Comments

D***l

United Kingdom

Verified Purchase

5 .0

2026-02-22

Plug and play gigabit fiber module! ⚡

124 Helpful vote Comments

W***n

Republic of Korea

Verified Purchase

5 .0

2026-01-23

Great 1G SFP BiDi transceiver for long-reach fiber! Connects our warehouses beautifully.

97 Helpful vote Comments

A***s

France

Verified Purchase

5 .0

2026-01-20

Exactly as described. Great 1550nm/1310nm optic!

28 Helpful vote Comments

J***g

Hong Kong

Verified Purchase

5 .0

2025-12-18

Reliable 1.25Gbps data rate. Exactly what our machine room needed for cross-connects!

191 Helpful vote Comments

M***e

Bolivia

Verified Purchase

5 .0

2025-12-18

We needed reliable cell tower backhaul using 1550nm-TX/1310nm-RX wavelengths. These 1G Bidi SFP modules run cool at 45°C in outdoor cabinets. TX power sits perfectly around -3dBm. Zero packet loss!

202 Helpful vote Comments

J***e

Japan

Verified Purchase

5 .0

2025-12-02

Perfect for our server room upgrade.

61 Helpful vote Comments

J***n

Bolivia

Verified Purchase

5 .0

2025-12-02

Excellent total cost of ownership for data center mass deployment. Tested MSA compliance on Netgear and FS switches without a hitch. Solid DFB laser performance over 40km single-mode fiber links.

114 Helpful vote Comments

C***s

Spain

Verified Purchase

5 .0

2025-10-12

Upgraded my home 10G NAS gateway using this 1G fallback optic for distant ISP lines. DOM function is super handy for monitoring receiver sensitivity. Works right out of the box!

183 Helpful vote Comments

K***r

Ukraine

Verified Purchase

5 .0

2025-10-11

Fast shipping and great MSA compatibility!

21 Helpful vote Comments

B***l

Germany

Verified Purchase

5 .0

2025-10-06

Solid 40km distance, no dropped packets.

165 Helpful vote Comments

E***l

Costa Rica

Verified Purchase

5 .0

2025-09-30

Solid single mode transceiver! Easy setup for our outdoor cabinet fiber ring topology.

233 Helpful vote Comments

M***g

Denmark

Verified Purchase

5 .0

2025-08-28

The simplex LC connector snaps in securely. DOM support is accurate and very helpful.

203 Helpful vote Comments

P***n

Colombia

Verified Purchase

5 .0

2025-08-11

Deployed a batch for our campus fiber networking. DDM readings are incredibly stable over 35km SMF links. Seamless compatibility with our mixed Juniper and H3C switches. Highly recommend these 1.25G optics!

37 Helpful vote Comments

A***n

Netherlands

Verified Purchase

5 .0

2025-08-07

Flawless OEM compatibility! Plugged this 1550nm/1310nm module into our D-Link switch instantly.

41 Helpful vote Comments

J***n

Spain

Verified Purchase

5 .0

2025-08-04

DDM readings are spot on.

48 Helpful vote Comments

J***r

Spain

Verified Purchase

5 .0

2025-07-05

Cost-effective gigabit ethernet solution. Runs well within the 0 to 70°C operating temperature.

203 Helpful vote Comments

J***g

Turkey

Verified Purchase

5 .0

2025-06-20

Smooth 1.25Gbps link, very reliable!

117 Helpful vote Comments

A***a

Portugal

Verified Purchase

5 .0

2025-05-25

Works perfectly on my Cisco switch!

60 Helpful vote Comments

C***n

Ghana

Verified Purchase

5 .0

2025-05-24

Top notch Simplex LC transceiver.

201 Helpful vote Comments

S***s

Russian Federation

Verified Purchase

5 .0

2025-04-20

Awesome 1G Bidi SFP for the price.

120 Helpful vote Comments

M***n

Japan

Verified Purchase

4 .0

2025-03-16

Cardboard packaging was slightly dented, yet the 40km Simplex LC transceiver tested perfectly fine.

185 Helpful vote Comments

E***l

Brazil

Verified Purchase

5 .0

2024-06-22

Quick and easy ordering process..best price i found online for this item!

83 Helpful vote Comments

A***o

Canada

Verified Purchase

5 .0

2024-06-02

Excellent products, and good prices! No problems! Great website.

13 Helpful vote Comments

P***u

Finland

Verified Purchase

5 .0

2024-05-21

Thank you. Arrived on time and without damage.

11 Helpful vote Comments

M***e

Philippines

Verified Purchase

5 .0

2024-03-04

Super customer experience in terms of Fast delivery. Delivered as promised.

51 Helpful vote Comments

A***f

United States

Verified Purchase

5 .0

2023-11-17

Excellent. Fast and reliable delivery. Well priced items

7 Helpful vote Comments

M***o

Malaysia

Verified Purchase

5 .0

2023-11-14

Link-PP always delivers high-quality Optical Transceiver Module and this one is also within my expectation.

12 Helpful vote Comments

R***h

Macao

Verified Purchase

5 .0

2023-10-09

Very good service, along with very good product. Thanks!!!!

49 Helpful vote Comments

G***n

France

Verified Purchase

5 .0

2023-10-05

i love the clock that shows you how long you have to order to get tommorow.

6 Helpful vote Comments

C***y

Belarus

Verified Purchase

5 .0

2023-10-03

I was very happy with this order.

19 Helpful vote Comments

T***r

Norway

Verified Purchase

5 .0

2023-07-08

What a fun online buying experience

17 Helpful vote Comments

R***n

Indonesia

Verified Purchase

5 .0

2023-06-11

Good product. Delivery was Fast.

26 Helpful vote Comments

T***r

United Kingdom

Verified Purchase

5 .0

2023-06-06

pleased with the purchase!

22 Helpful vote Comments

O***g

Italy

Verified Purchase

5 .0

2023-05-16

Great service, Fast shipping and great pricing.

10 Helpful vote Comments

B***s

Brazil

Verified Purchase

5 .0

2023-04-04

Items correct and Fast shipping.

89 Helpful vote Comments

A***t

Israel

Verified Purchase

5 .0

2023-01-25

This is my first time, I hope everthing turns out ok. and that I have no issues. Thank you

18 Helpful vote Comments

Verified Purchase

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LINK-PP LS-BL55311G-40C 1G SFP BiDi 1550nm-TX/1310nm-RX 40km Simplex LC DOM SMF Optical Transceiver Module

Product Details

LINK-PP LS-BL55311G-40C 1G BiDi SFP Specifications

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Key Features of LINK-PP LS-BL55311G-40C 1G BiDi SFP

LINK-PP LS-BL55311G-40C 1G BiDi SFP Optical Module

LS-BL55311G-40C: 1G Connectivity for FTTH

LS-BL55311G-40C Module with 1550nm-TX and 1310nm-RX Wavelength

LS-BL55311G-40C Module Supporting 40km Transmission

LS-BL55311G-40C Module with Simplex LC Interface

LS-BL55311G-40C Module with DOM for Real-Time Monitoring

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