We're deploying outdoor cabinets for rural broadband. This says 0 to 70°C, but do you have an industrial-grade version that can handle sub-zero freezing temperatures?

This commercial version (0 to 70°C) is great for climate-controlled or standard indoor/outdoor cabinets. However, if you need extreme weather resistance, we offer the exact same spec in our industrial version (LS-BL55491G-A5I) supporting -40°C to 85°C.

Does this require dual LC or simplex LC patch cords? We only have a single strand of SMF available for the run.

You're in luck! This is a BiDi (WDM) module, meaning it transmits (1550nm) and receives (1490nm) over a single strand of single-mode fiber. It uses a Simplex LC connector, saving you up to 50% on fiber cabling limits.

Hey there, we run a mixed environment with Cisco and Mikrotik switches. Will this 1G BiDi SFP work smoothly across both without triggering "unsupported transceiver" errors?

Yes, absolutely! The LS-BL55491G-A5C is fully OEM compatible and flashed to work seamlessly across major brands like Cisco, Mikrotik, and Juniper without throwing hardware errors. Just plug and play.

Are these 150km modules really as reliable as the expensive original brand optics? We need extreme stability for our metropolitan area network.

They are! Our transceivers use premium 1550nm DFB lasers and highly sensitive APD receivers, delivering the exact same core performance and 1.25Gbps throughput as original brands, but at a fraction of the cost. Extremely cost-effective for enterprise setups.

Our procurement strictly requires adherence to industry specs. Does this single-mode module fully comply with SFP MSA and support standard DOM/DDM monitoring?

Yes, it strictly adheres to standard SFP MSA and SFF-8472 protocols. The built-in DDM/DOM allows your network admins to monitor voltage, temperature, and RX/TX power in real-time, ensuring full industry compliance.

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LINK-PP LS-BL55491G-A5C 1G SFP BiDi 1550nm-TX/1490nm-RX 150km DOM Simplex LC SMF Optical Transceiver Module

Name: LINK-PP LS-BL55491G-A5C 1G SFP BiDi 1550nm-TX/1490nm-RX 150km DOM Simplex LC SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 207070
Price: 43 USD
Availability: InStock
Rating: 5 (24 reviews)

# 207070

Product: LINK-PP LS-BL55491G-A5C 1G SFP BiDi 1550nm-TX/1490nm-RX 150km DOM Simplex LC SMF Optical Transceiver Module
SKU: 207070
P/N: LS-BL55491G-A5C
Price: $ 50
Stock: 610 in Stock
Sold: 2.4K
Product URL: https://www.l-p.com/products/494472.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

24 Reviews

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$ 47.5

1000

$ 46

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Manufacture: LINK-PP

P/N: LS-BL55491G-A5C

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-A5C 1G BiDi SFP Specifications

The LINK-PP LS-BL55491G-A5C is a high-performance 1.25Gbps BiDi SFP transceiver engineered for long-haul optical networking. This single-mode optical module utilizes advanced 1550nm DFB laser and APD photodiode technologies to achieve an extraordinary 150km reach. Operating on a standard 3.3V power supply, it guarantees stable gigabit ethernet transmission across expansive infrastructures.

LINK-PP Part Number	LS-BL55491G-A5C	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1550nm-TX/1490nm-RX	Max Cable Distance	150km
Connector	Simplex LC	Media	SMF
Transmitter Type	DFB	Receiver Type	APD
TX Power	0 to +5dBm	RX Power	-28 to -1dBm
Receiver Sensitivity	<-34dBm	DOM Support	Yes
Operating Temperature Range	0 to 70°C	Protocols	SFP MSA、SFF-8472

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Q: We're deploying outdoor cabinets for rural broadband. This says 0 to 70°C, but do you have an industrial-grade version that can handle sub-zero freezing temperatures? By D***s on 2026-05-09

A: This commercial version (0 to 70°C) is great for climate-controlled or standard indoor/outdoor cabinets. However, if you need extreme weather resistance, we offer the exact same spec in our industrial version (LS-BL55491G-A5I) supporting -40°C to 85°C. By admin on 2026-05-09
Q: Does this require dual LC or simplex LC patch cords? We only have a single strand of SMF available for the run. By P***z on 2026-02-18

A: You're in luck! This is a BiDi (WDM) module, meaning it transmits (1550nm) and receives (1490nm) over a single strand of single-mode fiber. It uses a Simplex LC connector, saving you up to 50% on fiber cabling limits. By admin on 2026-02-18
Q: Hey there, we run a mixed environment with Cisco and Mikrotik switches. Will this 1G BiDi SFP work smoothly across both without triggering "unsupported transceiver" errors? By D***r on 2026-01-29

A: Yes, absolutely! The LS-BL55491G-A5C is fully OEM compatible and flashed to work seamlessly across major brands like Cisco, Mikrotik, and Juniper without throwing hardware errors. Just plug and play. By admin on 2026-01-29
Q: Are these 150km modules really as reliable as the expensive original brand optics? We need extreme stability for our metropolitan area network. By S***t on 2025-09-19

A: They are! Our transceivers use premium 1550nm DFB lasers and highly sensitive APD receivers, delivering the exact same core performance and 1.25Gbps throughput as original brands, but at a fraction of the cost. Extremely cost-effective for enterprise setups. By admin on 2025-09-19
Q: Our procurement strictly requires adherence to industry specs. Does this single-mode module fully comply with SFP MSA and support standard DOM/DDM monitoring? By A***n on 2025-05-29

A: Yes, it strictly adheres to standard SFP MSA and SFF-8472 protocols. The built-in DDM/DOM allows your network admins to monitor voltage, temperature, and RX/TX power in real-time, ensuring full industry compliance. By admin on 2025-05-29

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C***a

Peru

Verified Purchase

5 .0

2026-07-30

APD receiver sensitivity is highly impressive.

49 Helpful vote Comments

A***t

Panama

Verified Purchase

5 .0

2026-06-25

Ideal for long-haul metropolitan area network links. Simplex LC saves so much fiber!

127 Helpful vote Comments

D***n

Netherlands

Verified Purchase

5 .0

2026-06-25

Upgraded our outdoor cabinet switches with these 1G BiDi SFPs. Completely stable connection!

204 Helpful vote Comments

D***n

Austria

Verified Purchase

5 .0

2026-06-19

The DDM feature gives me real-time voltage and temp stats on my router.

206 Helpful vote Comments

J***n

Denmark

Verified Purchase

5 .0

2026-05-31

Unbeatable value for a 150km extended-reach optical transceiver. Multi-brand compatibility is legit.

66 Helpful vote Comments

K***n

Argentina

Verified Purchase

5 .0

2026-05-22

DOM monitoring works great on Cisco switches.

151 Helpful vote Comments

W***n

United Kingdom

Verified Purchase

5 .0

2026-03-29

Using this 1G single fiber module for a multi-building campus network. The APD photodiode sensitivity is outstanding. It effortlessly achieved full 1.25Gbps throughput during our rigorous long-haul PRBS stress testing.

232 Helpful vote Comments

A***g

Viet Nam

Verified Purchase

5 .0

2026-03-10

Rock solid 1550nm-TX 150km transmission!

89 Helpful vote Comments

L***s

Austria

Verified Purchase

4 .0

2026-03-04

Box was slightly dented upon arrival, but the 1G BiDi module works flawlessly.

9 Helpful vote Comments

L***n

Germany

Verified Purchase

5 .0

2026-02-18

Solved our base station backhaul connectivity issue.

258 Helpful vote Comments

J***s

Argentina

Verified Purchase

5 .0

2026-02-02

Plug and play 1.25Gbps performance. (^_^)

135 Helpful vote Comments

M***n

Czech Republic

Verified Purchase

5 .0

2026-01-20

Tested these LS-BL55491G-A5C modules across Juniper and Arista gear in our datacenter. SFF-8472 DOM reporting is perfectly accurate. RX optical power stayed robust at -26dBm over a 120km physical SMF loop.

103 Helpful vote Comments

M***s

Macao

Verified Purchase

5 .0

2026-01-20

Genuine SFP MSA compliant, zero compatibility issues.

64 Helpful vote Comments

B***z

Republic of Korea

Verified Purchase

5 .0

2025-12-13

Smooth gigabit ethernet transmission on standard single-mode fiber. Highly recommend for enterprise setups.

175 Helpful vote Comments

R***n

Finland

Verified Purchase

5 .0

2025-11-29

Fast data center interconnect deployment.

273 Helpful vote Comments

B***r

Brazil

Verified Purchase

5 .0

2025-10-19

Best simplex LC transceiver for the price!

46 Helpful vote Comments

D***n

Poland

Verified Purchase

5 .0

2025-10-18

Deployed fifty units for rural base station backhaul. The 1550nm/1490nm WDM split over a single strand is cost-effective. Even nearing 70°C operating temperature in summer cabinets, zero packet loss observed!

259 Helpful vote Comments

D***s

Ukraine

Verified Purchase

5 .0

2025-09-04

OEM compatible modules that actually work out of the box. Saved us thousands.

136 Helpful vote Comments

N***n

Costa Rica

Verified Purchase

5 .0

2025-08-25

Runs cool within the 0 to 70°C range. ❄️

144 Helpful vote Comments

T***n

Dominican Republic

Verified Purchase

5 .0

2025-07-31

Exactly what I needed for campus fiber.

261 Helpful vote Comments

W***e

Dominican Republic

Verified Purchase

5 .0

2025-05-16

Replaced expensive original brand optics with these for our Metropolitan Area Network. The 150km DFB laser performance matches OEM specs perfectly. Mass deployment was seamless with zero Link-Flap issues.

142 Helpful vote Comments

T***n

Turkey

Verified Purchase

5 .0

2025-04-10

Excellent 1490nm-RX sensitivity. Bridged two remote sites easily without signal drops.

166 Helpful vote Comments

B***z

Brazil

Verified Purchase

5 .0