Our team is planning a massive data center upgrade. If we need to bulk order 300 modules, do you offer any volume pricing discounts?

Yes, we provide aggressive tiered pricing for B2B bulk purchases. For an order of 300 units, please reach out to our sales team directly, and we will apply a substantial volume discount to help you stay within budget.

We run a mixed network with Cisco and Arista switches. Will this 1G BiDi SFP cause any "unsupported transceiver" errors during interoperability testing?

Not at all. The LS-BL55491G-A2I features strict OEM compatibility coding. It has been extensively tested to plug-and-play seamlessly across major brands like Cisco, Juniper, and Arista without throwing compatibility errors.

To achieve the full 120km transmission distance, what specific fiber adapter and cable type do we need for this module?

This transceiver is equipped with a Simplex LC interface. To guarantee the maximum 120km reach with the required optical budget, you must use a standard 9/125碌m Single-Mode Fiber (SMF) patch cable.

We’re deploying these in an EU facility. Does this optical module meet MSA standards and local industry compliance like RoHS?

Absolutely. This transceiver is fully compliant with the SFP Multi-Source Agreement (MSA), IEEE 802.3z standards, and holds RoHS certification, ensuring it strictly meets all global industry regulations for enterprise networking.

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LINK-PP LS-BL55491G-A2I 1G SFP BiDi 1550nm-TX/1490nm-RX 120km Simplex LC DOM SMF Optical Transceiver Module (Industrial)

Name: LINK-PP LS-BL55491G-A2I 1G SFP BiDi 1550nm-TX/1490nm-RX 120km Simplex LC DOM SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 183973
Price: 25.843 USD
Availability: InStock
Rating: 4.9 (25 reviews)

# 183973

Product: LINK-PP LS-BL55491G-A2I 1G SFP BiDi 1550nm-TX/1490nm-RX 120km Simplex LC DOM SMF Optical Transceiver Module (Industrial)
SKU: 183973
P/N: LS-BL55491G-A2I
Price: $ 30.05
Stock: 520 in Stock
Sold: 580
Product URL: https://www.l-p.com/products/478906.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

25 Reviews

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580 Sold

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100

$ 28.548

1000

$ 27.646

3000

$ 26.745

6000

$ 25.843

Manufacture: LINK-PP

P/N: LS-BL55491G-A2I

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-BL55491G-A2I 1G BiDi SFP Specifications

The LINK-PP LS-BL55491G-A2I is an industrial-grade 1G BiDi SFP transceiver engineered for rugged environments. This 1.25Gbps optical module supports a massive 120km transmission distance over single-mode fiber. Operating seamlessly between -40°C and 85°C, this high-performance Gigabit Ethernet solution guarantees stable, long-reach connectivity for critical networking infrastructure.

LINK-PP Part Number	LS-BL55491G-A2I	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1550nm-TX/1490nm-RX	Max Cable Distance	120km
Connector	Simplex LC	Media	SMF
Transmitter Type	DFB	Receiver Type	APD
TX Power	0 to +5dBm	RX Power	-28 to -1dBm
Receiver Sensitivity	<-32dBm	DOM Support	Yes
Operating Temperature Range	-40 to 85°C	Protocols	Fast Ethernet, Gigabit Fibre Channel, MSA Compliant

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Q: Our team is planning a massive data center upgrade. If we need to bulk order 300 modules, do you offer any volume pricing discounts? By M***l on 2026-05-12

A: Yes, we provide aggressive tiered pricing for B2B bulk purchases. For an order of 300 units, please reach out to our sales team directly, and we will apply a substantial volume discount to help you stay within budget. By admin on 2026-05-12
Q: We run a mixed network with Cisco and Arista switches. Will this 1G BiDi SFP cause any "unsupported transceiver" errors during interoperability testing? By J***s on 2026-02-08

A: Not at all. The LS-BL55491G-A2I features strict OEM compatibility coding. It has been extensively tested to plug-and-play seamlessly across major brands like Cisco, Juniper, and Arista without throwing compatibility errors. By admin on 2026-02-08
Q: To achieve the full 120km transmission distance, what specific fiber adapter and cable type do we need for this module? By R***z on 2026-01-07

A: This transceiver is equipped with a Simplex LC interface. To guarantee the maximum 120km reach with the required optical budget, you must use a standard 9/125碌m Single-Mode Fiber (SMF) patch cable. By admin on 2026-01-07
Q: We’re deploying these in an EU facility. Does this optical module meet MSA standards and local industry compliance like RoHS? By A***n on 2025-12-15

A: Absolutely. This transceiver is fully compliant with the SFP Multi-Source Agreement (MSA), IEEE 802.3z standards, and holds RoHS certification, ensuring it strictly meets all global industry regulations for enterprise networking. By admin on 2025-12-15

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D***l

Austria

Verified Purchase

5 .0

2026-05-19

Deployed these 1550nm-TX/1490nm-RX optics for base station backhaul. Stable under brutal outdoor heat. ☀️

60 Helpful vote Comments

T***a

Argentina

Verified Purchase

5 .0

2026-05-19

Excellent DOM support on this SFP.

22 Helpful vote Comments

J***t

Panama

Verified Purchase

5 .0

2026-05-07

Solid industrial transceiver for harsh environments.

166 Helpful vote Comments

M***t

Mexico

Verified Purchase

5 .0

2026-04-28

Perfect OEM compatible 1G SFP for my home NAS setup. Totally plug and play.

24 Helpful vote Comments

J***e

Colombia

Verified Purchase

5 .0

2026-04-26

Works great with our multi-brand switches.

181 Helpful vote Comments

S***t

Kazakhstan

Verified Purchase

5 .0

2026-02-13

Best 1G SFP for base station backhaul.

112 Helpful vote Comments

E***s

Germany

Verified Purchase

5 .0

2026-02-08

Perfect for my home NAS fiber connection.

18 Helpful vote Comments

D***s

Ecuador

Verified Purchase

5 .0

2026-01-18

We need industrial grade -40 to 85°C optics for outdoor cabinets. This LS-BL55491G-A2I SFP handles the 1550nm-TX/1490nm-RX split flawlessly over a 120km SMF run. Absolute lifesaver!

168 Helpful vote Comments

M***e

Republic of Korea

Verified Purchase

5 .0

2025-12-15

Great simplex LC optic, fast delivery!

45 Helpful vote Comments

D***s

Ecuador

Verified Purchase

5 .0

2025-11-01

1550nm-TX works perfectly over our SMF link.

77 Helpful vote Comments

S***z

Norway

Verified Purchase

5 .0

2025-10-27

Used this LS-BL55491G-A2I for a 120km long-haul link. APD receiver sensitivity is fantastic.

73 Helpful vote Comments

L***n

Peru

Verified Purchase

5 .0

2025-10-24

Solid 1.25Gbps performance. DDM makes monitoring optical power super easy for our sysadmins.

61 Helpful vote Comments

A***z

France

Verified Purchase

5 .0

2025-09-30

Sourced these for a massive data center machine room batch deployment. Zero packet loss on the 1.25Gbps link, and the OEM compatibility is perfectly spot on. Great TCO overall.

23 Helpful vote Comments

J***s

Germany

Verified Purchase

5 .0

2025-09-17

The -40 to 85°C rating is legit. Running in an outdoor cabinet without issues.

27 Helpful vote Comments

P***s

Austria

Verified Purchase

4 .0

2025-07-27

Shipping took an extra day. The 120km industrial transceiver itself is solid though. ¯_(ツ)_/¯

45 Helpful vote Comments

R***z

Philippines

Verified Purchase

5 .0

2025-06-05

Real 120km reach, highly recommended!

169 Helpful vote Comments

S***l

Venezuela

Verified Purchase

5 .0

2025-05-31

Great simplex LC module for our campus fiber network. DOM readings are perfectly accurate!

188 Helpful vote Comments

P***r

Thailand

Verified Purchase

5 .0

2025-04-01

Upgraded my home lab, connecting a 10G NAS via this 1G Simplex LC module for long-reach backup. Surprisingly low latency, and the DFB/APD combo provides stellar RX sensitivity. Unbeatable value!

173 Helpful vote Comments

T***s

Thailand

Verified Purchase

5 .0

2025-03-11

Plug and play LS-BL55491G-A2I, no errors! ✅

116 Helpful vote Comments

T***g

Russian Federation

Verified Purchase

5 .0

2025-02-21

Multi-brand switch compatibility tests passed with flying colors. Deployed 50 of these 1G BiDi SFPs for campus fiber networking. The built-in DOM feature is huge for real-time monitoring.

63 Helpful vote Comments

M***z

Switzerland

Verified Purchase

5 .0

2025-02-14

Ordered a batch for switch compatibility testing. Worked seamlessly on Cisco and Juniper gear!

137 Helpful vote Comments

B***a

Argentina

Verified Purchase

5 .0