What interface does the LS-SM551G-60I use?

It features an industry-standard duplex LC interface for secure, low-loss optical patch cord connections.

Does this SFP module support real-time diagnostics?

Yes, it includes built-in DOM capabilities for real-time monitoring of temperature, voltage, and optical power.

Is this module compatible with other switch brands?

Yes, LINK-PP offers custom EEPROM coding to ensure seamless compatibility with major networking hardware brands.

What wavelength does this transceiver operate on?

It operates at a 1550nm center wavelength using a high-stability DFB laser transmitter.

Just confirming before I buy—does this module require single mode fiber, or can I use it with my existing OM3 patch cables? What's the exact connector type?

This transceiver is designed exclusively for Single Mode Fiber (SMF) to achieve its 60km transmission distance at a 1550nm wavelength. It will not work properly with OM3 multimode fiber. It utilizes an industry-standard Duplex LC interface.

We need to deploy these in outdoor telecom cabinets where it gets scorching hot in summer and freezing in winter. Is the -40°C to 85°C operating temp actually reliable for continuous 24/7 use?

Yes, this industrial SFP transceiver is specifically engineered for harsh environments. The robust DFB laser and specialized heat dissipation design ensure highly stable optical transmission and continuous operation from -40°C freezes up to extreme 85°C temperatures.

Our industrial control network relies heavily on IEEE 802.3ah-2004 standards. Does this module fully support SFF-8472 DOM and that specific Ethernet protocol for our edge routers?

Yes, it is fully SFF-8472 MSA compliant, providing real-time Digital Optical Monitoring (DOM/DDM) for tracking voltage, temperature, and optical power. It also fully supports the IEEE 802.3ah-2004 protocol, making it perfectly adapted for industrial Ethernet applications.

Hey, we run a mix of Cisco and Ubiquiti gear in our server rooms. Will this 1.25G SFP module plug and play with different switch brands without throwing unsupported errors?

Absolutely! We offer custom EEPROM coding before shipping. Just let us know your hardware brands, and this MSA-compliant transceiver will work seamlessly across Cisco, Ubiquiti, and other major OEM networking platforms.

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LINK-PP LS-SM551G-60I 1.25G SFP 1550nm 60km Duplex LC DOM SMF Optical Transceiver Module (Industrial)

Name: LINK-PP LS-SM551G-60I 1.25G SFP 1550nm 60km Duplex LC DOM SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 197917
Price: 16.77 USD
Availability: InStock
Rating: 4.9 (57 reviews)

# 197917

Product: LINK-PP LS-SM551G-60I 1.25G SFP 1550nm 60km Duplex LC DOM SMF Optical Transceiver Module (Industrial)
SKU: 197917
P/N: LS-SM551G-60I
Price: $ 19.5
Stock: 450 in Stock
Sold: 650
Product URL: https://www.l-p.com/products/488450.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-60I

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-60I 1.25G SFP Specifications

The LINK-PP LS-SM551G-60I is a high-performance industrial-grade SFP transceiver engineered for reliable 1.25Gbps data transmission. Operating over a 1550nm wavelength, this robust optical module supports links up to 60km on single-mode fiber. It features a duplex LC connector, compliance with SFP MSA standards, and built-in DOM for continuous diagnostic monitoring in harsh environments ranging from -40°C to +85°C.

LINK-PP Part Number	LS-SM551G-60I	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 Temperature Range	-40 to 85°C	Protocols	SFF-8472 MSA Compliant, IEEE 802.3ah-2004

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Q: Just confirming before I buy—does this module require single mode fiber, or can I use it with my existing OM3 patch cables? What's the exact connector type? By D***z on 2026-05-19

A: This transceiver is designed exclusively for Single Mode Fiber (SMF) to achieve its 60km transmission distance at a 1550nm wavelength. It will not work properly with OM3 multimode fiber. It utilizes an industry-standard Duplex LC interface. By admin on 2026-05-19
Q: We need to deploy these in outdoor telecom cabinets where it gets scorching hot in summer and freezing in winter. Is the -40°C to 85°C operating temp actually reliable for continuous 24/7 use? By J***h on 2026-02-11

A: Yes, this industrial SFP transceiver is specifically engineered for harsh environments. The robust DFB laser and specialized heat dissipation design ensure highly stable optical transmission and continuous operation from -40°C freezes up to extreme 85°C temperatures. By admin on 2026-02-11
Q: Our industrial control network relies heavily on IEEE 802.3ah-2004 standards. Does this module fully support SFF-8472 DOM and that specific Ethernet protocol for our edge routers? By B***z on 2025-10-08

A: Yes, it is fully SFF-8472 MSA compliant, providing real-time Digital Optical Monitoring (DOM/DDM) for tracking voltage, temperature, and optical power. It also fully supports the IEEE 802.3ah-2004 protocol, making it perfectly adapted for industrial Ethernet applications. By admin on 2025-10-08
Q: Hey, we run a mix of Cisco and Ubiquiti gear in our server rooms. Will this 1.25G SFP module plug and play with different switch brands without throwing unsupported errors? By S***s on 2025-07-13

A: Absolutely! We offer custom EEPROM coding before shipping. Just let us know your hardware brands, and this MSA-compliant transceiver will work seamlessly across Cisco, Ubiquiti, and other major OEM networking platforms. By admin on 2025-07-13

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C***s

Japan

Verified Purchase

5 .0

2026-05-03

Used this 1.25G SFP 1550nm for campus network upgrades. Rock solid performance so far.

237 Helpful vote Comments

S***z

Sweden

Verified Purchase

5 .0

2026-05-03

1550nm optics synced up instantly. Great buy!

157 Helpful vote Comments

J***s

Czech Republic

Verified Purchase

4 .0

2026-04-14

Module works flawless for cell site backhaul, just wish the bulk packaging was sturdier.

176 Helpful vote Comments

D***s

Finland

Verified Purchase

5 .0

2026-03-31

Popped it into an Aruba switch and it recognized the industrial SFP transceiver immediately.

92 Helpful vote Comments

P***z

Italy

Verified Purchase

5 .0

2026-03-26

Linked up at 60km with zero packet loss.

148 Helpful vote Comments

S***l

Sweden

Verified Purchase

5 .0

2026-03-25

We run a WISP needing reliable industrial SFP transceivers for outdoor cabinets. These withstand summer heat up to 85°C without dropping links. OEM EEPROM coding worked flawlessly with mixed Juniper and MikroTik gear.

90 Helpful vote Comments

K***s

France

Verified Purchase

5 .0

2026-02-04

Handles -40°C freezes like an absolute champ.

151 Helpful vote Comments

D***s

Greece

Verified Purchase

5 .0

2026-01-20

Mass deployment went smooth. Highly recommended!

201 Helpful vote Comments

C***z

Singapore

Verified Purchase

5 .0

2026-01-07

DFB laser stays stable even at 85°C.

256 Helpful vote Comments

L***r

Macao

Verified Purchase

5 .0

2025-11-30

Great OEM compatible 1.25G SFP transceiver.

151 Helpful vote Comments

M***n

India

Verified Purchase

5 .0

2025-10-23

Upgraded our remote uplinks. The -40 to 85C temp range is exactly what we needed.

198 Helpful vote Comments

N***r

Italy

Verified Purchase

5 .0

2025-10-20

Needed a rugged 1.25G SFP 1550nm 60km module for a remote industrial control system. Paired with standard Duplex LC cables, it brought our factory network online instantly. Exceptional noise immunity and IEEE 802.3ah-2004 support.

208 Helpful vote Comments

J***g

Greece

Verified Purchase

5 .0

2025-09-13

Perfect for our outdoor cabinet deployment.

116 Helpful vote Comments

M***z

Netherlands

Verified Purchase

5 .0

2025-08-29

Saved us tons on campus fiber networking.

66 Helpful vote Comments

M***n

Panama

Verified Purchase

5 .0

2025-07-31

DOM features read perfectly on my Cisco.

93 Helpful vote Comments

K***n

Brazil

Verified Purchase

5 .0

2025-06-13

Tested these LS-SM551G-60I modules in our edge routers. The 1550nm DFB laser and PIN receiver effortlessly handled a 52km span. Perfect for harsh industrial environments, and DDM stats align precisely with our NMS.

228 Helpful vote Comments

F***e

Ireland

Verified Purchase

5 .0

2025-04-18

I was provided with fantastic, friendly, and Fast service. I would definitely recommend l-p.com to anyone who also wants to buy Optics Transceiver Modules

67 Helpful vote Comments

N***t

Italy

Verified Purchase

5 .0

2025-04-15

I would recommend this purchase because of the quality.

34 Helpful vote Comments

M***c

Iran, Islamic Republic of

Verified Purchase

5 .0

2025-04-14

My orders came Fast and with a great warranty so I have peace of mind as well.

16 Helpful vote Comments

E***z

Ukraine

Verified Purchase

4 .0

2025-04-13

Solid 1.25G industrial SFP. Shipping box got a bit dented but transceivers survived fine. ¯_(ツ)_/¯

142 Helpful vote Comments

D***z

Taiwan, Province of China

Verified Purchase

5 .0

2025-03-11

Procured a batch for enterprise VoIP backbone over SMF. The SFF-8472 MSA compliant DOM capabilities allow IT ops to proactively monitor optical power. No TX/RX issues across the 60km distance. Solid B2B purchase.

214 Helpful vote Comments

J***z

Colombia

Verified Purchase

5 .0

2025-03-02

Flawless SMF optical module for long links.

196 Helpful vote Comments

C***s

Peru

Verified Purchase

5 .0

2025-01-26

The DOM feature is super accurate for tracking temps in our unconditioned outdoor enclosures.

209 Helpful vote Comments

T***r

Singapore

Verified Purchase

5 .0

2025-01-23

This 100G QSFP28 Transceiver Module was purchased under the recommendation of a friend, and it has been running very well so far. Looking forward to future cooperation.

72 Helpful vote Comments

R***m

France

Verified Purchase

5 .0

2025-01-10

What a wonderful shopping experience.

72 Helpful vote Comments

M***n

Poland

Verified Purchase

5 .0

2024-12-25

Good price for a 60km Duplex LC module. MSA compliance makes mixing hardware easy.

99 Helpful vote Comments

A***k

United States

Verified Purchase

5 .0

2024-12-10

I was very pleased with the delivery, but more pleased with the product.

13 Helpful vote Comments

J***r

Viet Nam

Verified Purchase

5 .0

2024-11-20

Purchased 50 units for a metro network roll-out. All passed DDM diagnostics perfectly. ✅

256 Helpful vote Comments

P***z

Panama

Verified Purchase

5 .0

2024-11-03

Running these over 45km of single mode fiber. The DFB transmitter pushes strong signals.

75 Helpful vote Comments

S***n

Republic of Korea

Verified Purchase

5 .0

2024-10-14

Quick, easy, had it in stock and delivered promptly!

44 Helpful vote Comments

L***s

Germany

Verified Purchase

5 .0

2024-10-10

Solid Duplex LC connectors, very snug fit.

53 Helpful vote Comments

L***z

Canada

Verified Purchase

5 .0

2024-10-05

Great SMF transceivers for VoIP server backhaul. Jitter is gone and latency is low.

70 Helpful vote Comments

M***r

United States

Verified Purchase

5 .0

2024-09-04

Fantastic product, packed well, looked practically new. And they shipped it after-hours on a Thursday to arrive on time. Nice work.

68 Helpful vote Comments

P***y

Canada

Verified Purchase

5 .0

2024-08-25

Great website also. Lots of useful magnetics products. I will use again.

95 Helpful vote Comments

R***p

United States

Verified Purchase

5 .0

2024-08-16

Sales person reached me immediately, clarified the equipment for compatibility. Everything arrived on time.

10 Helpful vote Comments

C***n

Argentina

Verified Purchase

5 .0

2024-07-27

works fine.

19 Helpful vote Comments

A***o

United States

Verified Purchase

5 .0

2024-06-30

Great value and quality for such an inexpensive product.

48 Helpful vote Comments

N***l

Indonesia

Verified Purchase

5 .0

2024-04-22

Reliable. High-Performing. Cost-effective. What's not to like?

77 Helpful vote Comments

R***k

Lithuania

Verified Purchase

5 .0

2024-04-15

i get the best selection and price

69 Helpful vote Comments

A***L

South Africa

Verified Purchase

5 .0

2024-03-21

Have ordered a lot from Link-pp - NEVER had a problem...

57 Helpful vote Comments

Verified Purchase

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LINK-PP LS-SM551G-60I 1.25G SFP 1550nm 60km Duplex LC DOM SMF Optical Transceiver Module (Industrial)

Product Details

LINK-PP LS-SM551G-60I 1.25G SFP Specifications

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Key Features of LINK-PP LS-SM551G-60I 1.25G SFP

LINK-PP LS-SM551G-60I 1.25G SFP Optical Module

LS-SM551G-60I: 1G Connectivity for Voice over IP (VoIP) Server

LS-SM551G-60I Module with 1550nm Wavelength

LS-SM551G-60I Module Supporting 60km Transmission

LS-SM551G-60I Module with Duplex LC Interface

LS-SM551G-60I Module with DOM for Real-Time Monitoring

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