What data rates does the SFP-25GMLR-31 module support?

It is a dual-rate transceiver that supports both 10Gbps (10GBASE-LR) and 25Gbps (25GBASE-LR) Ethernet speeds.

Can this transceiver be used with multi-mode fiber cabling?

No, it is designed strictly for single-mode fiber (SMF) infrastructure using a 1310nm laser wavelength.

Does the SFP-25GMLR-31 module support troubleshooting loopback functions?

Yes, it supports both optical and electrical loopback functions to simplify link diagnostics and system testing.

Can I hot-swap this module while the switch is powered on and handling traffic?

Yes, the transceiver is completely hot-swappable, allowing you to insert or remove it without interrupting operations on neighboring ports.

Can this module operate directly with an eCPRI wireless protocol for high-speed distributed antenna system cellular backhaul?

Yes, the dual-rate architecture fully supports eCPRI protocol options, providing the high-speed signaling required for modern cellular base station infrastructure.

Will this optical transceiver module drop connection frames if our single-mode fiber runs through multiple patch panels over 7km?

The module's 1310nm optical transmitter is engineered with a robust power budget designed to absorb real-world link attenuation. As long as your total link loss—including fiber attenuation and patch panel insertion losses—remains within the standard specification limits, the module will maintain a stable, error-free connection.

Our high-performance computing (HPC) cluster suffers from packet loss under full load. What is the Bit Error Rate on this SFP28 module?

This module achieves a premium Bit Error Rate (BER) baseline of less than 10⁻¹². It guarantees zero packet drops during heavy continuous line-rate bursts.

Does the LS-SM3125E-10C optical module support both 25G Ethernet (25GBASE-LR) and 10G Ethernet (10GBASE-LR) protocols?

Yes, this is a native dual-rate SFP28 optical module that fully supports both 10G and 25G line rates, making it ideal for legacy infrastructure migrations.

What is the typical power consumption per port when running a 25G link over a long 10km dark fiber haul?

The module is highly energy efficient, drawing under 1.2W of power even under maximum data traffic stress. This helps maintain low server room cooling costs.

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Mellanox SFP-25GMLR-31 Compatible LINK-PP 10/25G SFP28 Dual-Rate 1310nm 10km Duplex LC/UPC DOM SMF Optical Transceiver Module

Name: Mellanox SFP-25GMLR-31 Compatible LINK-PP 10/25G SFP28 Dual-Rate 1310nm 10km Duplex LC/UPC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 214559
Price: 34.194 USD
Availability: InStock
Rating: 4.9 (27 reviews)

# 214559

Product: Mellanox SFP-25GMLR-31 Compatible LINK-PP 10/25G SFP28 Dual-Rate 1310nm 10km Duplex LC/UPC DOM SMF Optical Transceiver Module
SKU: 214559
P/N: LS-SM3125E-10C
Price: $ 39.76
Stock: 674 in Stock
Sold: 1.5K
Product URL: https://www.l-p.com/products/493983.htm

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Compatible:: Cisco; LINK-PP; Broadcom; Intel; Mellanox

Compatible P/N:: MMA2L20-AR | 10km; MMA2L20-AR-I | 10km; SFP-25GMLR-31 | 10km; SFP-25GELR-31-I | 20km; SFP-25GERL-31 | 30km; SFP-25GERL-31-I | 30km; SFP-25GER-31 | 40km; SFP-25GER-31-I | 40km

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Mellanox SFP-25GMLR-31 Compatible LINK-PP 10/25G SFP28 Specifications

SFP-25GMLR-31 serves as a versatile 10/25G dual-rate SFP28 transceiver module, engineered to bridge distances up to 10km over single-mode fiber via a duplex LC/UPC interface, all while capping its power envelope at a modest 1.2W and offering real-time health insights through digital optical monitoring (DOM).

Mellanox Part Number	SFP-25GMLR-31	Vendor Name	LINK-PP
Form Factor	SFP28	Max Data Rate	25.78Gbps
Wavelength	1310nm	Max Cable Distance	10km
Connector	Duplex LC	Media	SMF
Transmitter Type	DFB	Receiver Type	PIN
TX Power	-8 to +3dBm	RX Power	-14 to +3dBm
Receiver Sensitivity	＜-13dBm	Receiver Overload	2dBm
Operating Temperature Range	0 to 70°C	Protocols	SFF-8472, SFF-8024, SFF-8431, SFF-8432, CEI-28G-VSR

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Q: Can this module operate directly with an eCPRI wireless protocol for high-speed distributed antenna system cellular backhaul? By B***h on 2026-03-17

A: Yes, the dual-rate architecture fully supports eCPRI protocol options, providing the high-speed signaling required for modern cellular base station infrastructure. By admin on 2026-03-18
Q: Will this optical transceiver module drop connection frames if our single-mode fiber runs through multiple patch panels over 7km? By E***s on 2026-01-05

A: The module's 1310nm optical transmitter is engineered with a robust power budget designed to absorb real-world link attenuation. As long as your total link loss—including fiber attenuation and patch panel insertion losses—remains within the standard specification limits, the module will maintain a stable, error-free connection. By admin on 2026-01-06
Q: Our high-performance computing (HPC) cluster suffers from packet loss under full load. What is the Bit Error Rate on this SFP28 module? By C***m on 2025-11-20

A: This module achieves a premium Bit Error Rate (BER) baseline of less than 10⁻¹². It guarantees zero packet drops during heavy continuous line-rate bursts. By admin on 2025-11-21
Q: Does the LS-SM3125E-10C optical module support both 25G Ethernet (25GBASE-LR) and 10G Ethernet (10GBASE-LR) protocols? By A***s on 2025-11-07

A: Yes, this is a native dual-rate SFP28 optical module that fully supports both 10G and 25G line rates, making it ideal for legacy infrastructure migrations. By admin on 2025-11-08
Q: What is the typical power consumption per port when running a 25G link over a long 10km dark fiber haul? By D***r on 2025-09-24

A: The module is highly energy efficient, drawing under 1.2W of power even under maximum data traffic stress. This helps maintain low server room cooling costs. By admin on 2025-09-25

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N***n

India

Verified Purchase

5 .0

2026-04-29

Needed a reliable 1310nm 10km 10/25G dual-rate transceiver for a new office building cross-connect. These SMF duplex LC optics delivered clean signals over a 6km span. Latency is non-existent, and the price point beats OEM by a mile.

106 Helpful vote Comments

Q***y

Austria

Verified Purchase

5 .0

2026-04-10

Replaced some generic 10G optics with these dual-rate 10/25G transceivers to future-proof our server racks. The broad protective packaging kept them safe during transit. Immediate link synchronization.

47 Helpful vote Comments

K***s

South Africa

Verified Purchase

5 .0

2026-03-21

Running stable at 25Gbps in our enterprise core. Zero CRC errors so far!

34 Helpful vote Comments

U***m

Turkey

Verified Purchase

5 .0

2026-02-02

Highly reliable duplex LC/UPC transceivers. The dual-rate capability makes hot-swapping between old 10G line cards and new 25G infrastructure seamless. No manual port overriding required.

58 Helpful vote Comments

Y***l

Israel

Verified Purchase

5 .0

2026-01-30

Our data center facility just completed a massive migration from 10G aggregation to 25G line rates, and these SFP28 transceivers were our primary building blocks. Populating high-density line cards often leads to severe thermal build-up, but these modules run incredibly cool, drawing minimal wattage per port. Every module reports its serial number and manufacturing data correctly via DOM, allowing our automated inventory scripts to track assets accurately. The duplex LC/UPC connector provides a solid click, and optical loss across our patch panels was well within the expected 1310nm single-mode attenuation budget. Phenomenal value.

104 Helpful vote Comments

A***h

Libyan Arab Jamahiriya

Verified Purchase

4 .0

2026-01-17

Great 10/25G dual-rate modules. Docked one star because the outer box was slightly dented during international shipping, though the individual transceiver packaging inside was secure and undamaged.

29 Helpful vote Comments

B***r

Malaysia

Verified Purchase

4 .0

2025-10-05

The LS-SM3125E-10C single-mode module performs exactly as advertised over our 8km campus fiber link. Wish the delivery tracking info updated faster on the website, but the product itself is top tier.

16 Helpful vote Comments

R***l

Norway

Verified Purchase

5 .0

2025-09-22

Impressive optical performance. The duplex LC interface clicked in tightly with our patch cables. Real-time DDM monitoring gives accurate temperature and voltage stats inside our rack console.

114 Helpful vote Comments

O***e

United States

Verified Purchase

5 .0

2025-08-19

Using these in an outdoor enclosure for a local campus security camera network. The standard temperature range is holding up fine during summer heat. Consistent 25G data throughput across all nodes.

128 Helpful vote Comments

L***e

Mexico

Verified Purchase

5 .0

2025-08-04

Flawless 10km single-mode fiber transport. LINK-PP nailed it.

66 Helpful vote Comments

V***y

Ukraine

Verified Purchase

5 .0

2025-07-16

Solid construction and precise optical alignment. We noticed immediate stability on a noisy fiber run where older optics kept flapping. Definite improvement in signal-to-noise ratio.

99 Helpful vote Comments

T***y

Denmark

Verified Purchase

5 .0

2025-03-27

We use these optical modules for short-to-medium haul single-mode runs between corporate campus zones. The 10km budget leaves plenty of attenuation margin for minor patch panel connections. Clean, error-free links.

148 Helpful vote Comments

M***i

United States

Verified Purchase

5 .0

2024-05-16

Very happy with the speed of delivery, unlike others, and accuracy of order. Will buy from them again.

21 Helpful vote Comments

C***n

Canada

Verified Purchase

5 .0

2024-02-21

Works as advertised and as expected.

50 Helpful vote Comments

D***e

Brazil

Verified Purchase

5 .0

2024-02-11

The most reliable and the best value for money on 10/25/40G Transceiver Modules.

102 Helpful vote Comments

R***n

France

Verified Purchase

5 .0

2024-01-05

Link-pp is very professional and strive to meet my needs at any time!

47 Helpful vote Comments

W***d

Macao

Verified Purchase

5 .0

2023-10-16

Inexpensive, quick, and correct.

47 Helpful vote Comments

t***m

Malaysia

Verified Purchase

5 .0

2023-10-15

Nothing to complain, except the slow delivery. Hope it would be Faster the next time.

43 Helpful vote Comments

A***h

Sweden

Verified Purchase

5 .0

2023-10-01

This product is very good

56 Helpful vote Comments

S***r

Philippines

Verified Purchase

5 .0

2023-09-24

It just works as expected. At a good price.

42 Helpful vote Comments

A***u

Malaysia

Verified Purchase

5 .0

2023-09-01

I finally decide to give LINK-PP Ethernet port a try, since they are not as expensive as an original module. The result makes me very satisfied. They work well with very low insertion loss on our equipment, and the connection is also very firm.

48 Helpful vote Comments

L***M

Singapore

Verified Purchase

5 .0

2023-07-27

This order was very prompt getting ready and shipped, I am very satisfied, get my order to me on time... Great customer care.

53 Helpful vote Comments

C***n

Maldives

Verified Purchase

5 .0

2023-04-12

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.

44 Helpful vote Comments

S***i

Nepal

Verified Purchase

5 .0

2023-03-04

Placed the order easily, very quick shipping. What's more, the price is much lower than the original, and the products are of the same or better quality. I'm a repeat buyer.

59 Helpful vote Comments

R***n

Romania

Verified Purchase

5 .0

2023-02-12

placed my order, made my payment, but it was was shipped slowly.

46 Helpful vote Comments

M***c

Brazil

Verified Purchase

5 .0