Does the internal optical assembly utilize a DFB or a FP laser for the 1550nm transmitter?

It utilizes a premium 1550nm DFB (Distributed Feedback) laser to ensure minimal spectral width and stable performance over 80km.

We are an ISP in the UK updating old telecom lines. Are these SFP modules fully compliant with European regulatory standards?

Yes, they carry full CE, RoHS, and FCC certifications, making them completely compliant with European enterprise and utility network regulations.

What exact type of fiber patch cord and connector do I need to connect this 80km SFP module?

You will need a single-mode fiber patch cable terminated with a standard Simplex LC connector.

Does this module support Fast Ethernet and STM-1/OC-3 transmission protocols at 155Mbps?

Yes, it fully supports 155M multi-rate protocols, making it ideal for both legacy telecom STM-1/OC-3 lines and standard Fast Ethernet networking.

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LINK-PP LS-BL554901-80I 155M SFP BiDi 1550nm-TX/1490nm-RX 80km Simplex LC DDM SMF Optical Transceiver Module (Industrial)

Name: LINK-PP LS-BL554901-80I 155M SFP BiDi 1550nm-TX/1490nm-RX 80km Simplex LC DDM SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 205664
Price: 9.46 USD
Availability: InStock
Rating: 4.9 (17 reviews)

# 205664

Product: LINK-PP LS-BL554901-80I 155M SFP BiDi 1550nm-TX/1490nm-RX 80km Simplex LC DDM SMF Optical Transceiver Module (Industrial)
SKU: 205664
P/N: LS-BL554901-80I
Price: $ 11
Stock: 330 in Stock
Sold: 1.7K
Product URL: https://www.l-p.com/products/494046.htm

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Manufacture: LINK-PP

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Compatible:: LINK-PP

Compatible P/N:: LS-BL315501-10C | 10km; LS-BL315501-10I | 10km; LS-BL553101-10C | 10km; LS-BL553101-10I | 10km; LS-BL315501-15C | 15km; LS-BL553101-15C | 15km; LS-BL315501-20C | 20km; LS-BL315501-20I | 20km; LS-BL553101-20C | 20km; LS-BL553101-20I | 20km; LS-BL315501-40C | 40km; LS-BL315501-40I | 40km; LS-BL553101-40C | 40km; LS-BL553101-40I | 40km; LS-BL315501-80C | 80km; LS-BL315501-80I | 80km; LS-BL495501-80C | 80km; LS-BL495501-80I | 80km; LS-BL553101-80C | 80km; LS-BL553101-80I | 80km; LS-BL554901-80C | 80km; LS-BL554901-80I | 80km

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LINK-PP LS-BL554901-80I 155M SFP Specifications

LS-BL554901-80I is an industrial-grade 155M SFP BiDi optical transceiver module operating at 1550nm-TX / 1490nm-RX, supporting up to 80km transmission over single-mode fiber with a DFB laser transmitter and PIN photodiode, and designed for reliable performance across an extended operating temperature range of -40 to +85 °C.

LINK-PP Part Number	LS-BL554901-80I	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	155Mbps
Wavelength	1550nm-TX/1490nm-RX	Max Cable Distance	80km
Connector	Simplex LC	Media	SMF
Transmitter Type	DFB	Receiver Type	PIN
TX Power	-5 to +2dBm	Receiver Sensitivity	-32dBm
RX Power	-32 to -6dBm	DOM Support	Yes
Operating Temperature Range	-40 to 85°C	Protocols	Fast Ethernet, Gigabit Fibre Channel, MSA Compliant

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Q: Does the internal optical assembly utilize a DFB or a FP laser for the 1550nm transmitter? By T***r on 2026-01-05

A: It utilizes a premium 1550nm DFB (Distributed Feedback) laser to ensure minimal spectral width and stable performance over 80km. By admin on 2026-01-06
Q: We are an ISP in the UK updating old telecom lines. Are these SFP modules fully compliant with European regulatory standards? By L***s on 2025-08-29

A: Yes, they carry full CE, RoHS, and FCC certifications, making them completely compliant with European enterprise and utility network regulations. By admin on 2025-08-30
Q: What exact type of fiber patch cord and connector do I need to connect this 80km SFP module? By M***y on 2025-05-21

A: You will need a single-mode fiber patch cable terminated with a standard Simplex LC connector. By admin on 2025-05-22
Q: Does this module support Fast Ethernet and STM-1/OC-3 transmission protocols at 155Mbps? By B***r on 2025-03-10

A: Yes, it fully supports 155M multi-rate protocols, making it ideal for both legacy telecom STM-1/OC-3 lines and standard Fast Ethernet networking. By admin on 2025-03-11

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P***d

United Kingdom

Verified Purchase

5 .0

2026-05-11

Perfect for our 80km P2P link. Signal strength is excellent. Happy with the purchase!

77 Helpful vote Comments

P***h

France

Verified Purchase

5 .0

2026-04-23

We compared this module against other 155M BiDi SFPs on the market. The DFB laser maintained a tighter wavelength stability over temperature, and the PIN receiver had a lower noise floor. At 80 km, the signal-to-noise ratio was superior, allowing reliable communication even with marginal fibre quality. The firmware is fully MSA compliant, so no proprietary handshake issues arose. For long‑haul 155M applications, this is a top-performing optical transceiver.

151 Helpful vote Comments

J***y

United States

Verified Purchase

5 .0

2026-03-14

Finally found a reliable SFP for our 80km link between data centers. The -40 to 85°C operating range is perfect for our Texas summers. DDM feature is a plus.

106 Helpful vote Comments

B***w

Lithuania

Verified Purchase

5 .0

2026-02-26

DDM shows accurate TX power around -3dBm. Exactly what we needed for our single-mode fiber link.

43 Helpful vote Comments

S***r

Israel

Verified Purchase

5 .0

2026-01-17

Works flawlessly with our existing single-mode fiber plant. The 155M data rate is a perfect match for our legacy automation systems. Love the simple LC connection.

108 Helpful vote Comments

D***d

Japan

Verified Purchase

5 .0

2025-12-28

We’ve deployed these in our regional offices for campus network interconnection. The 80km reach handles the distance between buildings effortlessly. The industrial temperature rating gives us peace of mind for our unconditioned spaces.

121 Helpful vote Comments

M***y

United Arab Emirates

Verified Purchase

4 .0

2025-10-27

Excellent transceiver for long-distance backhaul, but the shipping cost was a bit high for our order. The product quality is top-notch, though, and I'd recommend it to anyone.

18 Helpful vote Comments

E***s

Hungary

Verified Purchase

5 .0

2025-10-13

Field deployment involved connecting two industrial sites separated by 70km of underground fibre. The SFP operated without a single flap through seasonal temperature swings from -10°C to 55°C. DOM reported stable TX power (-3dBm) and RX power (-27dBm) throughout the test period. The integrated digital diagnostics helped us quickly identify a loose connector during installation. This module is a workhorse for critical infrastructure backbones.

137 Helpful vote Comments

N***n

Libyan Arab Jamahiriya

Verified Purchase

5 .0

2025-10-06

Running strong in our outdoor cabinet at -25°C. That industrial temp range is no joke.

65 Helpful vote Comments

G***y

India

Verified Purchase

5 .0

2025-09-25

Deployed 50 of these SFP modules in our new warehouse distribution centers for the conveyor control network. The industrial temperature spec was key as the network closets are not fully climate-controlled.

96 Helpful vote Comments

A***d

Iran, Islamic Republic of

Verified Purchase

5 .0

2025-07-09

Solid SFP, good DOM support for monitoring optical power. We use a lot of these transceiver modules for our remote tower links. The 1550nm-TX and 1490nm-RX wavelength pair is standard for us.

85 Helpful vote Comments

D***s

Indonesia

Verified Purchase

5 .0

2025-06-19

We deployed these SFP modules for a 155Mbps SCADA backhaul over a single-strand SMF. The BiDi design cut our fibre usage in half, and the Simplex LC connector simplified patching. With TX at -2dBm and RX sensitivity at -32dBm, the link budget supported our 76km run with multiple patch panels. The module performed consistently across humidity and vibration tests. It’s a no‑nonsense solution for legacy industrial networks.

119 Helpful vote Comments

G***n

Cambodia

Verified Purchase

5 .0

2025-05-13

Replaced a failed module with this LS-BL554901-80I BiDi SFP module. Backhaul link is stable again. Thx!

72 Helpful vote Comments

F***n

Italy

Verified Purchase

5 .0

2025-04-14

Using these BiDi optical modules for 155Mbps connections to remote monitoring sites. The single-fiber BiDi technology cuts our fiber usage in half, which is a huge win for our older infrastructure.

98 Helpful vote Comments

F***k

Finland

Verified Purchase

4 .0

2025-03-02

These 155M SFP modules are awesome and work as expected. The only downside was the shipping; it took a day longer than the estimate. But for the price and reliability, I'll be ordering again.

31 Helpful vote Comments

M***r

Ireland

Verified Purchase

5 .0

2025-02-23

Great for connecting our substations back to the main control center. The 80km link provides a stable connection over the single-mode fiber.

63 Helpful vote Comments

C***e

Republic of Korea

Verified Purchase

5 .0