We run a mixed environment of Cisco Catalyst switches and Arista routers. Will this 1.25G 1550nm SFP work seamlessly across both without throwing unverified OEM errors?

Absolutely! The LS-SM551G-40C is fully MSA compliant and extensively tested for multi-vendor interoperability. It’s 100% plug-and-play with Cisco, Arista, Juniper, and other major brands. No "unsupported transceiver" warnings will interrupt your workflow.

Does this transceiver support DOM/DDM monitoring and is it compatible with the IEEE 802.3ah standard for our Ethernet deployment?

Yes! It fully supports IEEE 802.3ah-2004 for gigabit networking and complies with the SFF-8472 standard. The built-in DOM (Digital Optical Monitoring) allows real-time remote diagnostics of TX/RX power, voltage, and internal temperature directly via your switch's SNMP interface.

Just to confirm before ordering, does this module require single-mode or multimode fiber? And what connector type is on the optical interface?

This specific transceiver operates over standard Single-Mode Fiber (SMF) using a Duplex LC connector. It’s optimized for 1550nm long-haul transmission, ensuring stable optical links up to 40km for your network infrastructure.

My datacenter needs to deploy about 300 units for a metro network upgrade. Do you guys offer any bulk discounts or special B2B tier pricing for large volumes?

Yes, we do! We provide significant cost savings for bulk IT procurement. For an order of 300 units, the price drops considerably from the standard retail rate. Just reach out to our sales team for a custom quote to support your batch deployment.

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NVIDIA/Mellanox SFP1G-EX-55 Compatible LINK-PP 1.25G SFP 1550nm 40km Duplex LC DOM SMF Optical Transceiver Module

Name: NVIDIA/Mellanox SFP1G-EX-55 Compatible LINK-PP 1.25G SFP 1550nm 40km Duplex LC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 213555
Price: 9.89 USD
Availability: InStock
Rating: 5 (25 reviews)

# 213555

Product: NVIDIA/Mellanox SFP1G-EX-55 Compatible LINK-PP 1.25G SFP 1550nm 40km Duplex LC DOM SMF Optical Transceiver Module
SKU: 213555
P/N: LS-SM551G-40C
Price: $ 11.5
Stock: 3862 in Stock
Sold: 1.8K
Product URL: https://www.l-p.com/products/493601.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

25 Reviews

4 Questions

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1.8K Sold

$ 11.5

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$ 10.925

1000

$ 10.58

3000

$ 10.235

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Manufacture: LINK-PP

P/N: LS-SM551G-40C

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

Compatible P/N:: SFP1G-SX-31 | 2km; SFP1G-SX-31-I | 2km; SFP1G-LX-31 | 10km; SFP1G-LX-31-I | 10km; SFP1G-ELX-31 | 20km; SFP1G-EX-31-I | 40km; SFP1G-EX-55 | 40km; SFP1G-ZX-55 | 80km; SFP1G-ZX-55-I | 80km; SFP1G-ZX100-55 | 100km; SFP1G-ZX120-55 | 120km; SFP1G-ZX160-55 | 160km

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Specifications

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NVIDIA/Mellanox SFP1G-EX-55 Compatible LINK-PP 1.25G SFP Specifications

The NVIDIA/Mellanox SFP1G-EX-55 Compatible LINK-PP module is a high-performance SFP transceiver designed for 1.25Gbps data rates over single-mode fiber. Operating on a single +3.3V power supply, it features a 1550nm DFB laser transmitter and a PIN photodetector. It accommodates standard case temperatures from 0 to +70°C, ensuring reliable operation across various gigabit Ethernet networking applications and optical links.

NVIDIA/Mellanox Part Number	SFP1G-EX-55	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1550nm	Max Cable Distance	40km
Connector	Duplex LC	Media	SMF
Transmitter Type	DFB	Receiver Type	PIN
TX Power	-5 to 0dBm	RX Power	-23 to -1dBm
Receiver Sensitivity	-23dBm	DOM Support	Yes
Operating Temperature Range	0 to 70°C	Protocols	SFF-8472 MSA Compliant, IEEE 802.3ah-2004

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Q: We run a mixed environment of Cisco Catalyst switches and Arista routers. Will this 1.25G 1550nm SFP work seamlessly across both without throwing unverified OEM errors? By D***e on 2026-03-03

A: Absolutely! The LS-SM551G-40C is fully MSA compliant and extensively tested for multi-vendor interoperability. It’s 100% plug-and-play with Cisco, Arista, Juniper, and other major brands. No "unsupported transceiver" warnings will interrupt your workflow. By admin on 2026-03-03
Q: Does this transceiver support DOM/DDM monitoring and is it compatible with the IEEE 802.3ah standard for our Ethernet deployment? By S***n on 2025-12-14

A: Yes! It fully supports IEEE 802.3ah-2004 for gigabit networking and complies with the SFF-8472 standard. The built-in DOM (Digital Optical Monitoring) allows real-time remote diagnostics of TX/RX power, voltage, and internal temperature directly via your switch's SNMP interface. By admin on 2025-12-14
Q: Just to confirm before ordering, does this module require single-mode or multimode fiber? And what connector type is on the optical interface? By M***l on 2025-11-02

A: This specific transceiver operates over standard Single-Mode Fiber (SMF) using a Duplex LC connector. It’s optimized for 1550nm long-haul transmission, ensuring stable optical links up to 40km for your network infrastructure. By admin on 2025-11-02
Q: My datacenter needs to deploy about 300 units for a metro network upgrade. Do you guys offer any bulk discounts or special B2B tier pricing for large volumes? By S***n on 2025-07-11

A: Yes, we do! We provide significant cost savings for bulk IT procurement. For an order of 300 units, the price drops considerably from the standard retail rate. Just reach out to our sales team for a custom quote to support your batch deployment. By admin on 2025-07-11

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R***s

Netherlands

Verified Purchase

5 .0

2026-05-28

Reliable 40km reach! Excellent build quality for commercial 0-70°C environments. Will definitely buy again.

128 Helpful vote Comments

J***n

Ireland

Verified Purchase

5 .0

2026-05-26

Using this duplex LC optical transceiver to bridge our main office and warehouse. Link came up instantly. DOM integration works perfectly via SNMP, making remote monitoring a breeze for our network admins.

160 Helpful vote Comments

J***n

Switzerland

Verified Purchase

5 .0

2026-04-23

Tested the LS-SM551G-40C across Dell and Arista hardware. Zero compatibility issues. Standard 0-70°C temp rating is perfect for our indoor racks. Great alternative to overpriced OEM optics for gigabit Ethernet architectures.

22 Helpful vote Comments

A***s

Germany

Verified Purchase

5 .0

2026-03-12

Perfect 40km SMF reach, no errors.

37 Helpful vote Comments

J***k

Hong Kong

Verified Purchase

5 .0

2025-12-22

Accurate DOM readings. Great value!

200 Helpful vote Comments

E***h

Brazil

Verified Purchase

5 .0

2025-10-31

Flawless Cisco compatibility! Just plug and play.

80 Helpful vote Comments

E***l

Macao

Verified Purchase

5 .0

2025-09-12

Duplex LC fits snug and secure.

149 Helpful vote Comments

S***r

Republic of Korea

Verified Purchase

5 .0

2025-08-11

Recognized immediately by our Juniper gear.

120 Helpful vote Comments

L***l

Denmark

Verified Purchase

5 .0

2025-06-12

Great for standard 0-70°C indoor racks.

128 Helpful vote Comments

J***n

Indonesia

Verified Purchase

5 .0

2025-05-27

Affordable 1.25G SFP for bulk datacenter use.

22 Helpful vote Comments

J***l

Portugal

Verified Purchase

4 .0

2025-05-09

Solid 1550nm transceivers. Delivery delayed by two days at customs, but packaging was fine.

196 Helpful vote Comments

J***n

Dominican Republic

Verified Purchase

5 .0

2025-02-07

Great MSA compliant transceivers! Replaced our old failed modules in the server room perfectly.

25 Helpful vote Comments

E***s

Argentina

Verified Purchase

5 .0

2025-01-26

Zero packet loss on our gigabit link.

109 Helpful vote Comments

M***n

Viet Nam

Verified Purchase

5 .0

2025-01-14

Stable DFB laser output, highly recommended!

89 Helpful vote Comments

L***M

United States

Verified Purchase

5 .0

2024-06-24

There are two main reasons why I purchase Sfp Cage in l-p.com, response is very Fast, also the price is inexpensive.

45 Helpful vote Comments

S***n

Ukraine

Verified Purchase

5 .0

2024-03-19

The company works with us very easily and I would recommend them to others

20 Helpful vote Comments

E***L

Singapore

Verified Purchase

5 .0

2023-12-02

No bad, no issues to report.

53 Helpful vote Comments

M***n

Canada

Verified Purchase

5 .0

2023-11-29

This product is excellent. I use it to connect my switch. Great feedback from the company when I asked a question about compatibility.

30 Helpful vote Comments

G***p

Maldives

Verified Purchase

5 .0

2023-06-20

Good prices and selection.

88 Helpful vote Comments

e***y

Republic of Korea

Verified Purchase

5 .0

2023-06-11

quick shipping process

22 Helpful vote Comments

D***o

United States

Verified Purchase

5 .0

2023-05-09

quick delivery is appreciated for our urgent demands.

59 Helpful vote Comments

C***n

Finland

Verified Purchase

5 .0

2023-04-11

I really like the Link-pp site, very straight forward.

63 Helpful vote Comments

S***i

United States

Verified Purchase

5 .0

2023-04-09

Great website that offers a lot of Sfp Cage products at competitive prices.

37 Helpful vote Comments

i***s

United States

Verified Purchase

5 .0

2023-03-15

My friend recommended l-p.com to me before, so I placed a testing order. Everything goes well.

21 Helpful vote Comments

M***i

Hungary

Verified Purchase

5 .0

2023-01-19

Nice, but to our suprise, this cheap magnetics has 3 layer of packaging. But it is good for us.

39 Helpful vote Comments

Verified Purchase

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NVIDIA/Mellanox SFP1G-EX-55 Compatible LINK-PP 1.25G SFP 1550nm 40km Duplex LC DOM SMF Optical Transceiver Module

Product Details

NVIDIA/Mellanox SFP1G-EX-55 Compatible LINK-PP 1.25G SFP Specifications

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Key Features of NVIDIA/Mellanox SFP1G-EX-55 Compatible LINK-PP 1G SFP

NVIDIA/Mellanox SFP1G-EX-55 Compatible LINK-PP 1.25G SFP Optical Module

SFP1G-EX-55: 1.25G Connectivity for Internet Service Provider (ISP)

SFP1G-EX-55 Module with 1550nm Wavelength

SFP1G-EX-55 Module Supporting 40km Transmission

SFP1G-EX-55 Module with Duplex LC Interface

SFP1G-EX-55 Module with DOM for Real-Time Monitoring

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