Will this 1G SFP module work flawlessly with our existing Cisco Catalyst and Juniper switches? We need to avoid vendor lock-in.

Yes! The LS-SM551G-A0C is highly compatible. It is SFF-8472 MSA compliant and has been fully tested to work seamlessly with Cisco, Juniper, Arista, and many other major brand switches without triggering unsupported transceiver warnings.

The 0 to 70°C operating temperature is fine for our server room, but we need some for outdoor cabinets in harsh winters. Do you have an industrial version?

Yes, we do! For outdoor or extreme environments, we highly recommend the LS-SM551G-A0I model, which is the industrial-grade counterpart supporting a wider temperature range of -40 to 85°C, ensuring stable long-haul transmission in harsh climates.

Does this 1.25Gbps optical module support standard IEEE protocols for telecom backhaul integration?

Definitely! It fully complies with the IEEE 802.3ah-2004 standards and supports DDM/DOM for real-time diagnostic monitoring. It’s an ideal, standards-based solution for telecom backbones, campus networks, and cell tower backhaul applications.

Is this transceiver compatible with multi-mode fiber (MMF), or do I strictly need single-mode fiber (SMF) for the 100km reach?

This specific 1550nm optical transceiver is exclusively designed for Single-Mode Fiber (SMF) using a Duplex LC connector. To achieve the 100km maximum cable distance, high-quality SMF is strictly required, as MMF cannot support this wavelength and extreme distance.

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LINK-PP LS-SM551G-A0C 1G SFP 1550nm 100km Duplex LC DOM SMF Optical Transceiver Module

Name: LINK-PP LS-SM551G-A0C 1G SFP 1550nm 100km Duplex LC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 181769
Price: 25.8 USD
Availability: InStock
Rating: 5 (46 reviews)

# 181769

Product: LINK-PP LS-SM551G-A0C 1G SFP 1550nm 100km Duplex LC DOM SMF Optical Transceiver Module
SKU: 181769
P/N: LS-SM551G-A0C
Price: $ 30
Stock: 1300 in Stock
Sold: 3.7K
Product URL: https://www.l-p.com/products/476870.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

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Manufacture: LINK-PP

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Compatible:: Cisco; LINK-PP; Adtran; Alcatel-Lucent; Arista; Avaya; Brocade; Calix; Ciena; DELL; Extreme; FS; Generic; H3C; HPE H3C; IBM; Intel; Juniper; NVIDIA/Mellanox; Netgear; SMC; SMC Networks

Compatible P/N:: LS-SM311G-02C | 2km; LS-SM311G-02I | 2km; LS-SM311G-10C | 10km; LS-SM311G-10I | 10km; LS-SM311G-20C | 20km; LS-SM311G-20I | 20km; LS-SM311G-40AI | 40km; LS-SM311G-40C | 40km; LS-SM311G-40I | 40km; LS-SM551G-40C | 40km; LS-SM551G-40I | 40km; LS-SM551G-60C | 60km; LS-SM551G-60I | 60km; LS-SM551G-80C | 80km; LS-SM551G-80I | 80km; LS-SM551G-A0C | 100km; LS-SM551G-A0I | 100km; LS-SM551G-A2C | 120km; LS-SM551G-A2I | 120km; LS-SM551G-A6C | 160km; LS-SM551G-A6I | 160km

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LINK-PP LS-SM551G-A0C 1G SFP Specifications

The LINK-PP LS-SM551G-A0C is a high-performance 1G SFP optical transceiver designed for long-distance data communications. Operating at a 1550nm wavelength over single-mode fiber, this commercial-grade module supports a maximum transmission distance of 100km. It features a duplex LC connector, +3.3V power supply, and fully complies with MSA standards for optimal network integration.

LINK-PP Part Number	LS-SM551G-A0C	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1550nm	Max Cable Distance	100km
Connector	Duplex LC	Media	SMF
Transmitter Type	DFB	Receiver Type	PIN
TX Power	0 to +5dBm	RX Power	-30 to -1dBm
Receiver Sensitivity	-28dBm	DOM Support	Yes
Operating Temperature Range	0 to 70°C	Protocols	SFF-8472 MSA Compliant, IEEE 802.3ah-2004

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Q: Will this 1G SFP module work flawlessly with our existing Cisco Catalyst and Juniper switches? We need to avoid vendor lock-in. By J***z on 2026-03-30

A: Yes! The LS-SM551G-A0C is highly compatible. It is SFF-8472 MSA compliant and has been fully tested to work seamlessly with Cisco, Juniper, Arista, and many other major brand switches without triggering unsupported transceiver warnings. By admin on 2026-03-30
Q: The 0 to 70°C operating temperature is fine for our server room, but we need some for outdoor cabinets in harsh winters. Do you have an industrial version? By S***n on 2025-11-13

A: Yes, we do! For outdoor or extreme environments, we highly recommend the LS-SM551G-A0I model, which is the industrial-grade counterpart supporting a wider temperature range of -40 to 85°C, ensuring stable long-haul transmission in harsh climates. By admin on 2025-11-13
Q: Does this 1.25Gbps optical module support standard IEEE protocols for telecom backhaul integration? By D***s on 2025-08-19

A: Definitely! It fully complies with the IEEE 802.3ah-2004 standards and supports DDM/DOM for real-time diagnostic monitoring. It’s an ideal, standards-based solution for telecom backbones, campus networks, and cell tower backhaul applications. By admin on 2025-08-19
Q: Is this transceiver compatible with multi-mode fiber (MMF), or do I strictly need single-mode fiber (SMF) for the 100km reach? By J***s on 2025-08-10

A: This specific 1550nm optical transceiver is exclusively designed for Single-Mode Fiber (SMF) using a Duplex LC connector. To achieve the 100km maximum cable distance, high-quality SMF is strictly required, as MMF cannot support this wavelength and extreme distance. By admin on 2025-08-10

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C***t

Germany

Verified Purchase

5 .0

2026-05-27

Excellent 1550nm SFP transceiver for my home NAS setup. Passed all duplex LC tests.

45 Helpful vote Comments

S***r

Spain

Verified Purchase

5 .0

2026-05-13

We needed reliable cell tower backhaul optics. The 0 to 70°C temp rating holds up well in climate-controlled enclosures. Outstanding 1G duplex LC transceiver for massive B2B procurement projects.

22 Helpful vote Comments

W***e

Mexico

Verified Purchase

5 .0

2026-02-27

Clean signal on single-mode fiber, highly recommend.

195 Helpful vote Comments

J***n

Dominican Republic

Verified Purchase

5 .0

2026-02-21

Works fine with my Juniper router immediately.

44 Helpful vote Comments

P***l

Mexico

Verified Purchase

5 .0

2026-02-10

MSA compliant, zero compatibility errors here.

129 Helpful vote Comments

S***g

Venezuela

Verified Purchase

5 .0

2026-02-08

Deployed 50 MSA compliant 1550nm modules across a mixed-vendor data center with HPE and Brocade switches. Zero link flaps. The digital optical monitoring DOM stats are incredibly precise.

28 Helpful vote Comments

D***n

Republic of Korea

Verified Purchase

5 .0

2026-01-03

Ran an OTDR test on a 95km dark fiber link. The TX power sat at +2dBm, and the PIN receiver handled attenuation beautifully. Top-tier long-distance 1G SFP for enterprise telecom backbones!

64 Helpful vote Comments

M***r

Portugal

Verified Purchase

5 .0

2025-11-25

Good build for 0-70C commercial temp range.

145 Helpful vote Comments

L***s

Poland

Verified Purchase

5 .0

2025-10-14

Upgraded our enterprise network with these SFP modules. Cisco compatibility is totally seamless!

109 Helpful vote Comments

C***n

Germany

Verified Purchase

5 .0

2025-09-26

Bought a batch of 1.25Gbps modules for outdoor cabinets. Running cool and stable.

98 Helpful vote Comments

T***s

Hong Kong

Verified Purchase

5 .0

2025-09-20

Great Duplex LC optical transceiver, plug and play.

77 Helpful vote Comments

K***z

Ukraine

Verified Purchase

5 .0

2025-07-13

Flawless 1.25Gbps link on our Cisco switches!

157 Helpful vote Comments

D***z

Bolivia

Verified Purchase

5 .0

2025-06-24

Nice 1G SFP for B2B bulk deployment.

92 Helpful vote Comments

D***n

Dominican Republic

Verified Purchase

5 .0

2025-06-08

Tested IEEE 802.3ah-2004 protocols on our Calix OLTs. This LS-SM551G-A0C module syncs up instantly. The 100km max cable distance provides massive headroom for rural campus optical network extensions.

189 Helpful vote Comments

M***n

Sweden

Verified Purchase

5 .0

2025-06-06

DOM tracking is super accurate on this.

30 Helpful vote Comments

D***z

Portugal

Verified Purchase

4 .0

2025-05-13

FedEx delayed my shipment by a day. Still, this 100km SMF transceiver is absolutely rock-solid.

153 Helpful vote Comments

A***t

Spain

Verified Purchase

5 .0

2025-04-24

Cheap and reliable 1550nm optical module.

92 Helpful vote Comments

S***h

Sweden

Verified Purchase

5 .0

2025-04-14

Solid 100km reach for cell tower backhaul.

131 Helpful vote Comments

A***n

Austria

Verified Purchase

5 .0

2025-04-12

Pushed the DFB transmitter to 80km without packet loss. Really solid 1G optic.

199 Helpful vote Comments

M***z

Mexico

Verified Purchase

4 .0

2025-04-12

Box was a bit dented on arrival, but the 1G SFP 1550nm module works perfectly.

69 Helpful vote Comments

B***s

Ecuador

Verified Purchase

5 .0

2025-04-03

Perfect DDM support for our campus fiber network.

86 Helpful vote Comments

S***t

Singapore

Verified Purchase

5 .0

2025-03-16

We use these for long-haul ISP links. Receiver sensitivity is exactly as advertised.

106 Helpful vote Comments

S***r

Ecuador

Verified Purchase

5 .0

2025-01-05

Arista switch accepted it immediately. The 1G fiber distance is absolutely incredible!

87 Helpful vote Comments

D***z

Denmark

Verified Purchase

5 .0

2024-12-18

The DDM feature saves us so much troubleshooting time in the server room. Good value. ⏱️

65 Helpful vote Comments

S***r

Italy

Verified Purchase

5 .0

2024-12-08

Hard to beat the price for a 100km SMF optical transceiver. Smooth Dell integration.

37 Helpful vote Comments

S***m

Ireland

Verified Purchase

5 .0

2024-08-04

Good and quality product, I am really enjoying it

34 Helpful vote Comments

H***e

Poland

Verified Purchase

5 .0

2024-07-30

These are the best Optical Transceiver Modules I’ve used. They are WAY better than the cheap ones that fail all the time.They feel high quality as well! You definitely get what you pay for in this instance. Well worth the money.

123 Helpful vote Comments

C***n

United States

Verified Purchase

5 .0

2024-06-22

Our boss is very picky about the quality, while I am looking for the way to save budget. Link-PP makes it possible for me not to make trade-offs between quality and cost. Every time get money's worth out of the products.

52 Helpful vote Comments

C***y

Australia

Verified Purchase

5 .0

2024-05-01

good place to shop great variety of products

63 Helpful vote Comments

R***w

Turkey

Verified Purchase

5 .0

2024-03-30

My contact with LINK-PP involved more than just a few clicks and a purchase for 1000Base-T Optical Transceiver Module. I had to make a return for no fault of the Company and they were helpful and courteous throughout the process. I am quite pleased.

49 Helpful vote Comments

A***o

Indonesia

Verified Purchase

5 .0

2024-03-20

Their customer service has been great! Love that I can call and they are friendly and willing to answer all my questions. I also like that I can go online and find everything I need. Their website is user friendly! Highly recommend!!

37 Helpful vote Comments

M***R

Nepal

Verified Purchase

5 .0

2024-01-19

Very responsible and Fast 100% reccommended

112 Helpful vote Comments

T***r

United States

Verified Purchase

5 .0