We are upgrading our campus network and need about 200 pairs. Do you offer B2B bulk pricing for large batch deployments?

Yes, we provide tiered volume discounts for enterprise procurement. For orders over 200 pairs, the price drops significantly, and we offer flexible Net Terms to help manage your IT budget. Please contact our live sales team for a custom quote.

Does this require OS2 single-mode fiber, and what connector type should my patch cords have?

Correct. You will need standard 9/125碌m Single-Mode Fiber (OS1 or OS2) to achieve the 120km maximum transmission distance. Make sure your fiber patch cords are terminated with a Simplex LC connector to match the optical interface of this transceiver.

Will this 1G BiDi SFP work if I mix Cisco Catalyst switches on one end and Juniper on the other?

Absolutely. Our LS-BL55491G-A2C is 100% MSA compliant. As long as you use the complementary 1490nm-TX/1550nm-RX module on the opposite end, it bridges multi-vendor equipment like Cisco, Juniper, Dell, and HPE seamlessly.

Are these optics compliant with standard Gigabit Ethernet and Fibre Channel protocols? I need DOM support for my SNMP monitoring.

Yes! They fully support IEEE Fast/Gigabit Ethernet and 1G Fibre Channel standards. Furthermore, the built-in DDM/DOM functionality provides real-time diagnostic telemetry (such as module temperature, voltage, laser bias, and TX/RX power) directly to your network management systems.

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LINK-PP LS-BL55491G-A2C 1G SFP BiDi 1550nm-TX/1490nm-RX 120km DOM Simplex LC SMF Optical Transceiver Module

Name: LINK-PP LS-BL55491G-A2C 1G SFP BiDi 1550nm-TX/1490nm-RX 120km DOM Simplex LC SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 181522
Price: 24.983 USD
Availability: InStock
Rating: 5 (41 reviews)

# 181522

Product: LINK-PP LS-BL55491G-A2C 1G SFP BiDi 1550nm-TX/1490nm-RX 120km DOM Simplex LC SMF Optical Transceiver Module
SKU: 181522
P/N: LS-BL55491G-A2C
Price: $ 29.05
Stock: 3100 in Stock
Sold: 890
Product URL: https://www.l-p.com/products/476699.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

41 Reviews

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$ 27.598

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$ 26.726

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Manufacture: LINK-PP

P/N: LS-BL55491G-A2C

Compatible:: Cisco; LINK-PP; Brocade; DELL; Extreme; FS; Generic; H3C; HPE; HW; Juniper; Netgear

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-A2C 1G BiDi SFP Specifications

The LINK-PP LS-BL55491G-A2C 1G BiDi SFP specifications deliver genuinely outstanding performance for long-range networking. This commercial-grade optical transceiver operates over a single-mode fiber with a 1.25Gbps data rate. It features a high-performance 1550nm DFB transmitter and a highly sensitive APD receiver, ensuring stable signal integrity across massive industrial network environments.

LINK-PP Part Number	LS-BL55491G-A2C	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	0 to 70°C	Protocols	Fast Ethernet, Gigabit Fibre Channel, MSA Compliant

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Q: We are upgrading our campus network and need about 200 pairs. Do you offer B2B bulk pricing for large batch deployments? By A***s on 2026-05-17

A: Yes, we provide tiered volume discounts for enterprise procurement. For orders over 200 pairs, the price drops significantly, and we offer flexible Net Terms to help manage your IT budget. Please contact our live sales team for a custom quote. By admin on 2026-05-17
Q: Does this require OS2 single-mode fiber, and what connector type should my patch cords have? By S***n on 2026-04-01

A: Correct. You will need standard 9/125碌m Single-Mode Fiber (OS1 or OS2) to achieve the 120km maximum transmission distance. Make sure your fiber patch cords are terminated with a Simplex LC connector to match the optical interface of this transceiver. By admin on 2026-04-01
Q: Will this 1G BiDi SFP work if I mix Cisco Catalyst switches on one end and Juniper on the other? By M***l on 2026-03-30

A: Absolutely. Our LS-BL55491G-A2C is 100% MSA compliant. As long as you use the complementary 1490nm-TX/1550nm-RX module on the opposite end, it bridges multi-vendor equipment like Cisco, Juniper, Dell, and HPE seamlessly. By admin on 2026-03-30
Q: Are these optics compliant with standard Gigabit Ethernet and Fibre Channel protocols? I need DOM support for my SNMP monitoring. By S***z on 2026-03-14

A: Yes! They fully support IEEE Fast/Gigabit Ethernet and 1G Fibre Channel standards. Furthermore, the built-in DDM/DOM functionality provides real-time diagnostic telemetry (such as module temperature, voltage, laser bias, and TX/RX power) directly to your network management systems. By admin on 2026-03-15

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R***a

Italy

Verified Purchase

5 .0

2026-06-01

Reliable 1.25Gbps simplex LC transceivers. (¬‿¬)

38 Helpful vote Comments

M***z

France

Verified Purchase

5 .0

2026-05-13

Tested on Dell and H3C gear without any vendor lock-in errors. Superb value!

152 Helpful vote Comments

P***l

Egypt

Verified Purchase

5 .0

2026-05-04

Replaced failing OEM optics with these 120km units. Rx sensitivity is legitimately impressive.

78 Helpful vote Comments

J***r

Portugal

Verified Purchase

4 .0

2026-04-25

Solid 1550nm bidi transceivers. Delayed one day in customs, but specs are spot on.

32 Helpful vote Comments

R***s

Norway

Verified Purchase

5 .0

2026-04-20

Exactly what my home NAS lab needed.

46 Helpful vote Comments

L***s

Bolivia

Verified Purchase

5 .0

2026-03-20

I ran a light meter test before deploying. The DFB transmitter hits exactly +2dBm. Perfect for bridging our multi-vendor campus network from Netgear to FS. The DOM monitoring is a lifesaver!

152 Helpful vote Comments

J***z

Belgium

Verified Purchase

5 .0

2026-03-14

We needed cost-effective 1G connectivity for regional networks over dark fiber. Using these Simplex LC units cut our fiber strand usage in half. Unbeatable TCO for bulk procurement.

116 Helpful vote Comments

J***s

Bolivia

Verified Purchase

5 .0

2025-11-21

Pushing 100km easily with this APD receiver.

54 Helpful vote Comments

P***a

Australia

Verified Purchase

5 .0

2025-10-02

The 1550nm/1490nm split works magic for fiber shortages. Halved our SMF cable costs!

150 Helpful vote Comments

C***s

Switzerland

Verified Purchase

5 .0

2025-09-07

We use these LINK-PP modules for gigabit fiber channel setups. Totally stable so far.

62 Helpful vote Comments

R***s

Brazil

Verified Purchase

5 .0

2025-09-05

Easy plug and play for Juniper switches.

46 Helpful vote Comments

S***z

Philippines

Verified Purchase

5 .0

2025-08-12

Smooth batch deployment in the main server room. They stay well within 0-70°C specs.

115 Helpful vote Comments

R***t

Ireland

Verified Purchase

5 .0

2025-07-27

MSA compliant and zero sync issues.

170 Helpful vote Comments

R***s

Italy

Verified Purchase

5 .0

2025-06-17

As a network admin, finding reliable long-haul 1G BiDi SFPs is tough. These pushed 110km on our telecom backhaul with excellent Rx sensitivity. No CRC errors on our Extreme switches.

167 Helpful vote Comments

P***e

Thailand

Verified Purchase

5 .0

2025-04-26

Runs cool in our indoor data center. ❄️

90 Helpful vote Comments

L***n

Indonesia

Verified Purchase

5 .0

2025-04-10

Great DOM metrics for our campus fiber.

74 Helpful vote Comments

R***n

Switzerland

Verified Purchase

5 .0

2025-04-01

Tested these 120km MSA compliant modules in my home lab before corporate roll-out. They negotiated 1G perfectly across a generic switch and a Cisco router. Highly recommended!

48 Helpful vote Comments

S***n

Colombia

Verified Purchase

5 .0

2025-03-12

Flawless 120km link on single mode fiber!

178 Helpful vote Comments

M***a

Tunisia

Verified Purchase

5 .0

2025-02-24

Deployed 50 pairs for outdoor cabinet rings. DDM shows rock-solid optical power levels.

149 Helpful vote Comments

S***l

Viet Nam

Verified Purchase

5 .0

2025-01-09

Perfect Cisco compatible 1G bidi optics!

112 Helpful vote Comments

C***r

Spain

Verified Purchase

5 .0

2024-12-31

Dropped these into our HPE switches for an enterprise WAN link. Syncs instantly.

177 Helpful vote Comments

A***r

Germany

Verified Purchase

5 .0

2024-12-25

Fast shipping for our rack deployment!

28 Helpful vote Comments

L***n

Ireland

Verified Purchase

5 .0

2024-12-24

Good TX power from the DFB laser. Easily punches through our older SMF runs. ⚡

152 Helpful vote Comments

M***g

Philippines

Verified Purchase

5 .0

2024-12-02

Saved our budget on base station backhaul.

51 Helpful vote Comments

J***d

United States

Verified Purchase

5 .0

2024-06-04

Best choice and price on the internet.

34 Helpful vote Comments

M***y

Lithuania

Verified Purchase

5 .0

2024-05-22

I received my product even sooner than expected. The price was the best on the web and the product works perfectly.

80 Helpful vote Comments

N***n

United Kingdom

Verified Purchase

5 .0

2024-03-29

Great value and quality for such an inexpensive product.

60 Helpful vote Comments

A***d

Republic of Korea

Verified Purchase

5 .0

2024-03-05

Great company. I like the choice of delivery options and prices.

48 Helpful vote Comments

R***n

Poland

Verified Purchase

5 .0

2023-12-15

l-p.com is enough for me. The 100BASE-BX Optical Transceiver Module quality is great for the price paid. Thanks!

32 Helpful vote Comments

A***y

Bulgaria

Verified Purchase

5 .0

2023-11-30

I place all my large orders that I need reliably delivered with LINK-PP.

28 Helpful vote Comments

M***y

Japan

Verified Purchase

5 .0

2023-11-24

Received in 7 days, very good.

66 Helpful vote Comments

V***i

France

Verified Purchase

5 .0

2023-10-27

Works as described. Happy with the purchase

84 Helpful vote Comments

C***h

Turkey

Verified Purchase

5 .0

2023-08-07

I have never had a problem and most of the time with the expedited shipping products arrive promptly even though they have to travel all the way across the country.

45 Helpful vote Comments

J***e

United States

Verified Purchase

5 .0

2023-08-06

The quality doesn't let me down! Highly recommend l-p.com.

31 Helpful vote Comments

H***n

Norway

Verified Purchase

5 .0

2023-07-25

I think the title says it all! Thank you, will use this site again.

106 Helpful vote Comments

B***n

Thailand

Verified Purchase

5 .0

2023-05-27

Very Very good service. Ordered product and received before the date that was given.

76 Helpful vote Comments

I***k

United States

Verified Purchase

5 .0

2023-04-21

Busy in IT as is normal today. What more could you ask other than a company who has it in stock at a fair price and ships now. That is what they did for me.

61 Helpful vote Comments

H***i

Norway

Verified Purchase

5 .0

2023-04-09

The LINK-PP site is clean and easy to navigate with good product information and great prices.

33 Helpful vote Comments

V***d

Ireland

Verified Purchase

5 .0

2023-03-04

The items did arrive and in great shape. I have installed them and just put them to use this last Monday. All went very well. I use to do business with l-p.com from my previous employer as well and have always found your products to be great both cost and quality wise.

12 Helpful vote Comments

F***o

Canada

Verified Purchase

5 .0

2023-02-14

LINK-PP is the most user-friendly website I have ever found. It has very knowledgeable staff and offers various good products at a reasonable price. Also, the Fast delivery has helped me save a lot of time.

44 Helpful vote Comments