What is the maximum transmission distance of this module?

This 1.25G SFP module supports long-haul data transmission up to 60km over single-mode fiber cables.

Does the LS-SM551G-60C support Digital Optical Monitoring (DOM)?

Yes, it includes integrated DOM support for real-time monitoring of temperature, voltage, and optical power levels.

What type of fiber cable should I use with this module?

You should use single-mode fiber (SMF) cables with duplex LC connectors for optimal 60km performance.

Is this SFP module hot-pluggable?

Yes, it features a hot-pluggable SFP footprint, allowing installation or removal without powering down the host.

Is the digital diagnostic monitoring (DDM/DOM) compliant with IEEE 802.3ah-2004 for our remote telecom nodes?

Yes! The module fully supports real-time DDM/DOM for monitoring TX/RX power, voltage, and temperature, strictly adhering to IEEE 802.3ah-2004 and standard Gigabit Ethernet protocols.

Does this LS-SM551G-60C module work with legacy Cisco Catalyst and newer Ubiquiti EdgeSwitches without throwing unrecognized errors?

Absolutely! It’s highly OEM compatible and strictly follows the SFF-8472 MSA protocol. You can plug and play with both Cisco and Ubiquiti gear—no bypass commands needed.

We have a 45km run between two campuses. Will this work over standard 9/125 single-mode fiber, and does it use a Duplex LC connector?

Spot on. This transceiver is perfectly optimized for 9/125 SMF using a standard Duplex LC interface. The 1550nm DFB laser provides plenty of power to push data up to 60km without signal degradation.

I'm planning a data center mass deployment and need about 500 units. Can we get a bulk discount for enterprise procurement?

Yes, we offer tiered bulk pricing! For an order of 500 units, you'll see a significant drop from the standard retail price. Please contact our B2B sales team directly for your custom quote.

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LINK-PP LS-SM551G-60C 1.25G SFP 1550nm 60km Duplex LC DOM SMF Optical Transceiver Module

Name: LINK-PP LS-SM551G-60C 1.25G SFP 1550nm 60km Duplex LC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 197897
Price: 15.05 USD
Availability: InStock
Rating: 4.9 (53 reviews)

# 197897

Product: LINK-PP LS-SM551G-60C 1.25G SFP 1550nm 60km Duplex LC DOM SMF Optical Transceiver Module
SKU: 197897
P/N: LS-SM551G-60C
Price: $ 17.5
Stock: 1100 in Stock
Sold: 980
Product URL: https://www.l-p.com/products/488431.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

P/N: LS-SM551G-60C

Compatible:: LINK-PP

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-60C 1.25G SFP Specifications

The LINK-PP LS-SM551G-60C is a high-performance SFP transceiver designed for 1.25Gbps Gigabit Ethernet applications. This commercial-grade module operates at a 1550nm wavelength, supporting long-haul transmissions up to 60km over single-mode fiber. It features a duplex LC interface, low power consumption, and full compliance with SFP MSA and SFF-8472 standards for seamless network integration and reliable operation.

LINK-PP Part Number	LS-SM551G-60C	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1550nm	Max Cable Distance	60km
Connector	Duplex LC	Media	SMF
Transmitter Type	DFB	Receiver Type	PIN
TX Power	0 to +5dBm	RX Power	-26 to -1dBm
Receiver Sensitivity	-26dBm	DOM Support	Yes
Operating case temperature	0 to 70°C	Protocols	SFF-8472 MSA Compliant, IEEE 802.3ah-2004

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Q: Is the digital diagnostic monitoring (DDM/DOM) compliant with IEEE 802.3ah-2004 for our remote telecom nodes? By J***z on 2026-05-21

A: Yes! The module fully supports real-time DDM/DOM for monitoring TX/RX power, voltage, and temperature, strictly adhering to IEEE 802.3ah-2004 and standard Gigabit Ethernet protocols. By admin on 2026-05-21
Q: Does this LS-SM551G-60C module work with legacy Cisco Catalyst and newer Ubiquiti EdgeSwitches without throwing unrecognized errors? By M***s on 2026-04-16

A: Absolutely! It’s highly OEM compatible and strictly follows the SFF-8472 MSA protocol. You can plug and play with both Cisco and Ubiquiti gear—no bypass commands needed. By admin on 2026-04-16
Q: We have a 45km run between two campuses. Will this work over standard 9/125 single-mode fiber, and does it use a Duplex LC connector? By C***n on 2026-04-05

A: Spot on. This transceiver is perfectly optimized for 9/125 SMF using a standard Duplex LC interface. The 1550nm DFB laser provides plenty of power to push data up to 60km without signal degradation. By admin on 2026-04-05
Q: I'm planning a data center mass deployment and need about 500 units. Can we get a bulk discount for enterprise procurement? By M***s on 2025-11-30

A: Yes, we offer tiered bulk pricing! For an order of 500 units, you'll see a significant drop from the standard retail price. Please contact our B2B sales team directly for your custom quote. By admin on 2025-11-30

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M***s

Spain

Verified Purchase

5 .0

2026-05-23

Works exactly as spec'd for 0-70°C commercial use. Reliable 1.25G SFP 1550nm 60km module!

119 Helpful vote Comments

L***t

Germany

Verified Purchase

4 .0

2026-04-22

Delivery took an extra day. Otherwise, this Duplex LC DOM SMF transceiver is solid.

106 Helpful vote Comments

K***r

India

Verified Purchase

5 .0

2026-03-15

Top-notch 60km SFP module for enterprise routing.

161 Helpful vote Comments

A***g

Finland

Verified Purchase

5 .0

2026-03-09

Grabbed a batch for our data center mass deployment. They synced up instantly with our mixed Netgear and Ubiquiti gear. The single-mode fiber LC connections are extremely snug.

95 Helpful vote Comments

T***s

Argentina

Verified Purchase

5 .0

2026-03-07

Reliable long-haul data transmission SFP. ^_^

68 Helpful vote Comments

D***g

Singapore

Verified Purchase

5 .0

2026-01-20

Paired this 1.25G optical transceiver with my home 10G NAS for a remote backup link. The -26dBm receiver sensitivity handles the SMF run flawlessly without drops.

72 Helpful vote Comments

J***n

Hong Kong

Verified Purchase

5 .0

2026-01-05

Duplex LC DOM SMF specs are spot-on!

113 Helpful vote Comments

D***e

Portugal

Verified Purchase

5 .0

2026-01-01

Solid build quality. The single-mode fiber optic transceivers survived our rigorous lab tests.

156 Helpful vote Comments

B***n

Spain

Verified Purchase

5 .0

2025-12-09

Flawless OEM compatibility! Plugged right into our Juniper gear with zero MSA warnings. ✅

80 Helpful vote Comments

C***z

Czech Republic

Verified Purchase

5 .0

2025-11-30

Good 1.25Gbps throughput for our base station backhaul. Duplex LC clicks in perfectly.

181 Helpful vote Comments

C***s

Malaysia

Verified Purchase

5 .0

2025-11-20

DOM features work great on my switch!

85 Helpful vote Comments

S***n

Denmark

Verified Purchase

5 .0

2025-11-13

Perfect 1550nm wavelength match for our SMF.

120 Helpful vote Comments

B***h

Poland

Verified Purchase

5 .0

2025-10-09

Real-time DOM support is a lifesaver for our remote outdoor cabinet troubleshooting.

149 Helpful vote Comments

R***t

Russian Federation

Verified Purchase

5 .0

2025-06-13

TX/RX levels are perfectly within spec. ✌️

125 Helpful vote Comments

S***s

New Zealand

Verified Purchase

5 .0

2025-06-03

The entire team was super helpful ,It was delivered very Fast and work perfectly with my switch. I would definitely buy from l-p.com again.

17 Helpful vote Comments

P***h

Mexico

Verified Purchase

5 .0

2025-05-02

The order process went well, and I think I received a good value for the item I purchased. It was delivered as scheduled. I wish I could have received a better deal on the warrenty of my product. I like having the extra warrenty, but if the cost is high, I do not get it., Thanks for your help, providing me with a great shopping experance.

40 Helpful vote Comments

J***y

Morocco

Verified Purchase

5 .0

2025-04-26

Absolutely professional! The service on both the sales and after-sales sides have been timely and supportive.

82 Helpful vote Comments

R***h

New Zealand

Verified Purchase

5 .0

2025-04-25

Great site, easy to use.

15 Helpful vote Comments

D***r

Romania

Verified Purchase

5 .0

2025-04-20

Super quick and efficient shipping - even to Australia.

43 Helpful vote Comments

M***s

Indonesia

Verified Purchase

5 .0

2025-04-09

Clean Gigabit Ethernet optical transceiver signal. ✨

149 Helpful vote Comments

C***g

Taiwan, Province of China

Verified Purchase

4 .0

2025-03-27

Box was slightly dented upon arrival, but the 1.25G SFP 1550nm modules work flawlessly!

136 Helpful vote Comments

R***y

Thailand

Verified Purchase

5 .0

2025-02-21

very responsive, competitive, and reliable.

63 Helpful vote Comments

M***n

Italy

Verified Purchase

5 .0

2025-02-07

Deployed these 1550nm 60km modules for our campus fiber network. DDM monitoring via our Cisco switches shows excellent rx/tx levels. Perfect Gigabit Ethernet optical transceiver for long-haul links!

185 Helpful vote Comments

N***n

Costa Rica

Verified Purchase

5 .0

2025-01-26

Great replacement modules for our legacy network switches. Easy hot-pluggable installation, no hassle.

90 Helpful vote Comments

P***s

Italy

Verified Purchase

5 .0

2025-01-23

Excellent bulk pricing for enterprise procurement. The 1550nm DFB laser runs very cool.

104 Helpful vote Comments

M***r

United Kingdom

Verified Purchase

5 .0

2025-01-19

Best OEM compatible 1G SFP I've tried.

64 Helpful vote Comments

J***r

Kazakhstan

Verified Purchase

5 .0

2024-12-21

Tested the LS-SM551G-60C on an outdoor WAP backhaul setup. Even near 70°C peak summer heat, the SFF-8472 MSA compliant link stayed stable. Great OEM compatible 1G SFP. ☀️

152 Helpful vote Comments

M***z

Mexico

Verified Purchase

5 .0

2024-12-13

Fast shipping, standard SFF-8472 protocol works fine. ⚡

151 Helpful vote Comments

J***r

Canada

Verified Purchase

5 .0

2024-11-30

The prices were extremely reasonable and there was a huge range of products to chose from.

12 Helpful vote Comments

A***t

Turkey

Verified Purchase

5 .0

2024-11-25

Best supplier!

70 Helpful vote Comments

K***n

Spain

Verified Purchase

5 .0

2024-11-15

Handles max cable distance effortlessly. O_O

132 Helpful vote Comments

M***z

Thailand

Verified Purchase

5 .0

2024-11-09

Awesome long-haul data transmission SFP. Pushed 55km without issues on our telecom ring.

186 Helpful vote Comments

P***o

United States

Verified Purchase

4 .0

2024-11-09

I love shopping for new/refurbished hard drives from this site.

29 Helpful vote Comments

N***i

Morocco

Verified Purchase

5 .0

2024-10-25

the ordering is painless customer service is excellent

16 Helpful vote Comments

A***n

Taiwan, Province of China

Verified Purchase

5 .0

2024-10-07

Great value for data center mass deployment.

156 Helpful vote Comments

C***e

Nepal

Verified Purchase

5 .0

2024-08-02

very happy with the purchases at fs.com and grateful for the good work!

74 Helpful vote Comments

M***n

Germany

Verified Purchase

5 .0

2024-05-31

Everything went very smoothly and I was extremely satisfied.

43 Helpful vote Comments

E***g

United States

Verified Purchase

5 .0

2024-05-24

Good value and free shipping, excellent job!Link-pp has become my first choice when I need 10/25/40G Transceiver Modules products.

13 Helpful vote Comments

K***m

Singapore

Verified Purchase

5 .0

2024-05-01

I purchased 40G Transceiver Modules several months ago, it works well so far. I was totally satisfied with it. This time, I bought this kind of 100G Optical Transceiver Module to work with my new equipment.Hope it is also very compatible.

29 Helpful vote Comments

C***n

United States

Verified Purchase

5 .0

2024-03-08

We have always been pleased with the service and pricing from LINK-PP. Our account manager has been very helpful in finding us the hardware needed in the time needed and at the price needed.

28 Helpful vote Comments