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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DELL SFP-EX1550-40 Compatible LINK-PP 1.25G SFP 1550nm 40km Duplex LC DOM SMF Optical Transceiver Module

Name: DELL SFP-EX1550-40 Compatible LINK-PP 1.25G SFP 1550nm 40km Duplex LC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 213542
Price: 9.89 USD
Availability: InStock
Rating: 5 (26 reviews)

# 213542

Product: DELL SFP-EX1550-40 Compatible LINK-PP 1.25G SFP 1550nm 40km Duplex LC DOM SMF Optical Transceiver Module
SKU: 213542
P/N: LS-SM551G-40C
Price: $ 11.5
Stock: 3840 in Stock
Sold: 1.8K
Product URL: https://www.l-p.com/products/478011.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

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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; 320-2879 | 10km; SFP1G-ELX-31 | 20km; SFP-EX1550-40 | 40km; SFP-LX-40 | 40km; SFP1G-EX-31-I | 40km; 430-4586 | 80km; SFP1G-ZX-55-I | 80km; SFP-EZX-100 | 100km; SFP1G-ZX120-55 | 120km; SFP1G-ZX160-55 | 160km

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DELL SFP-EX1550-40 Compatible LINK-PP 1.25G SFP Specifications

The DELL SFP-EX1550-40 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.

DELL Part Number	SFP-EX1550-40	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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A***s

Brazil

Verified Purchase

5 .0

2026-05-29

Solid 1550nm module, totally MSA compliant. ✅

68 Helpful vote Comments

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

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

J***k

Hong Kong

Verified Purchase

5 .0

2025-12-22

Accurate DOM readings. Great value!

200 Helpful vote Comments

M***z

France

Verified Purchase

5 .0

2025-06-12

Solid DFB/PIN performance. Pulled 1.25Gbps throughput on our enterprise fiber upgrade without breaking a sweat.

35 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

R***s

Spain

Verified Purchase

5 .0

2025-04-23

Smooth single-mode fiber connection. The duplex LC interface clicked in perfectly and stayed secure.

175 Helpful vote Comments

S***z

Austria

Verified Purchase

5 .0

2025-04-08

No issues syncing with our Fortinet firewall. Awesome cost-effective fiber module for B2B procurement.

40 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

J***l

Malaysia

Verified Purchase

5 .0

2025-01-06

Deployed these 1.25G 1550nm SFPs for a campus fiber ring. DOM readings are highly accurate. TX power sits nicely around -2dBm. 100% plug-and-play with our mixed Cisco and Juniper switches!

44 Helpful vote Comments

P***s

Belgium

Verified Purchase

4 .0

2024-12-30

Modules work flawlessly for our 40km link, but the shipping box was pretty crushed.

91 Helpful vote Comments

F***n

Sweden

Verified Purchase

5 .0

2024-07-15

l-p.com consistently has competitive prices on top of the line fiber optical components with great customer service and Fast shipping. It's a very trustworthy company to do business with.

41 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

B***t

Singapore

Verified Purchase

5 .0