Can the SFP-25G-LR-I SFP28 module work on multi-mode fiber cables?

No. This 25G SFP28 module utilizes a 1310nm laser optimized specifically for Single-Mode Fiber (SMF). Using it with multi-mode fiber will cause severe signal attenuation and link failure.

What is the maximum power consumption of this transceiver?

The module is designed for high energy efficiency, limiting its maximum power consumption to 1.2W, which helps reduce thermal buildup in high-density switches.

Does the SFP-25G-LR-I support loopback testing functions?

Yes, it supports both optical and electrical loopback functions. This allows engineers to easily perform remote diagnostic testing and isolate link issues without physical hardware intervention.

Does this module include features to mitigate electromagnetic interference (EMI)?

Yes. The transceiver is built with a fully metallic enclosure that provides excellent shielding, significantly minimizing EMI in dense industrial network racks.

Does this module use a DFB or an EML laser type for its 1310nm transmitter setup?

It utilizes a high-reliability Distributed Feedback (DFB) laser, which provides the ideal balance of cost and performance for 10km links.

Can this module achieve the full 10km distance if there are multiple patch panels along the fiber link?

Yes, as long as the total link attenuation across your single-mode fiber path does not exceed the specified optical power budget.

Is this module genuinely rated for unconditioned outdoor cabinets down to -30°C?

Yes, the LS-SM3125-10I is an industrial-grade 25G SFP28 optical transceiver fully certified to operate reliably from -40°C up to +85°C (-40°F to 185°F).

Can the loopback feature help me isolate whether a 25G link issue is caused by the switch or the 10km fiber line?

Yes, exactly. By turning on electrical loopback, you isolate the host switch; by turning on optical loopback, you test the incoming fiber path.

How accurate are the real-time Digital Diagnostic Monitoring Interface reporting steps for Tx_Bias current and Rx_Power?

The DDM telemetry complies with SFF-8472, providing an accuracy of ±3dB for optical power readings and ±10% for internal laser bias current reporting.

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Arista SFP-25G-LR-I Compatible LINK-PP 25G SFP28 1310nm 10km Duplex LC/UPC DOM SMF Optical Transceiver Module (Industrial)

Name: Arista SFP-25G-LR-I Compatible LINK-PP 25G SFP28 1310nm 10km Duplex LC/UPC DOM SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 214111
Price: 36.98 USD
Availability: InStock
Rating: 4.9 (32 reviews)

# 214111

Product: Arista SFP-25G-LR-I Compatible LINK-PP 25G SFP28 1310nm 10km Duplex LC/UPC DOM SMF Optical Transceiver Module (Industrial)
SKU: 214111
P/N: LS-SM3125-10I
Price: $ 43
Stock: 157 in Stock
Sold: 2K
Product URL: https://www.l-p.com/products/491479.htm

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Compatible:: Cisco; LINK-PP; Arista; Brocade; FS; Generic; HW; Juniper; Mellanox

Compatible P/N:: SFP-25GLRL-31-I | 2km; SFP-25G-LR | 10km; SFP-25G-LR-I | 10km; SFP-25GELR-31-I | 20km; SFP-25G-ER | 30km; SFP-25G-ER-I | 30km; SFP-25G-ER40 | 40km; SFP-25G-ER40-I | 40km

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Arista SFP-25G-LR-I Compatible LINK-PP 25G SFP28 Specifications

SFP-25G-LR-I is an industrial-grade 25G SFP28 duplex LC/UPC single-mode optical transceiver engineered for robust 10km data links at a 1310nm nominal wavelength, capping its power consumption at an efficient 1.2W while featuring integrated Digital Optical Monitoring (DOM).

Arista Part Number	SFP-25G-LR-I	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
Receiver Sensitivity	-13dBm	Receiver Overload	2dBm
TX Power	-8 to +3dBm	RX Power	-14 to +3dBm
DOM	Supported	Protocols	SFF-8472, SFF-8402, SFF-8432, SFF-8431, CEI-28G-VSR
Operating Temperature Range	-40 to 85°C	Warranty	5 Years

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Q: Does this module use a DFB or an EML laser type for its 1310nm transmitter setup? By P***r on 2026-03-05

A: It utilizes a high-reliability Distributed Feedback (DFB) laser, which provides the ideal balance of cost and performance for 10km links. By admin on 2026-03-06
Q: Can this module achieve the full 10km distance if there are multiple patch panels along the fiber link? By K***y on 2025-12-03

A: Yes, as long as the total link attenuation across your single-mode fiber path does not exceed the specified optical power budget. By admin on 2025-12-04
Q: Is this module genuinely rated for unconditioned outdoor cabinets down to -30°C? By O***s on 2025-08-20

A: Yes, the LS-SM3125-10I is an industrial-grade 25G SFP28 optical transceiver fully certified to operate reliably from -40°C up to +85°C (-40°F to 185°F). By admin on 2025-08-21
Q: Can the loopback feature help me isolate whether a 25G link issue is caused by the switch or the 10km fiber line? By X***n on 2025-05-30

A: Yes, exactly. By turning on electrical loopback, you isolate the host switch; by turning on optical loopback, you test the incoming fiber path. By admin on 2025-05-31
Q: How accurate are the real-time Digital Diagnostic Monitoring Interface reporting steps for Tx_Bias current and Rx_Power? By Z***y on 2025-01-13

A: The DDM telemetry complies with SFF-8472, providing an accuracy of ±3dB for optical power readings and ±10% for internal laser bias current reporting. By admin on 2025-01-14

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V***e

Japan

Verified Purchase

5 .0

2026-04-04

Working in a high-density colocation data center, I handle thousands of transceivers. The build quality of the LINK-PP LS-SM3125-10I stands out immediately compared to generic optics. The pull-release mechanism is smooth and does not jam in dense 48-port SFP28 switches, which is critical during tight maintenance windows. We use these for long-distance interconnects (up to 10km) across separate data halls over single-mode fiber. The 1310nm lasers are highly stable, showing zero power degradation over months of continuous production runtime. DOM measurements are perfectly aligned with our physical fiber testers. If you need dependable 25Gbps single-mode duplex LC optics that just work every single time, this model is a safe bet.

104 Helpful vote Comments

R***d

United States

Verified Purchase

5 .0

2026-03-09

Reliable hardware. The duplex LC UPC connector snaps cleanly. Our single-mode fiber infrastructure is quite complex with multiple patch panels, but these optics punch through the insertion loss without an issue.

58 Helpful vote Comments

J***s

Sweden

Verified Purchase

5 .0

2026-02-11

Extreme temperatures don't faze these SFP28 modules at all. (^_^)b

38 Helpful vote Comments

N***m

Germany

Verified Purchase

5 .0

2026-01-08

Procured 50 units for our corporate data center expansion. EEPROM was coded correctly for our switches. The optical monitoring (DOM/DDM) is highly accurate when checking RX/TX power levels via CLI.

53 Helpful vote Comments

M***h

France

Verified Purchase

5 .0

2025-10-19

We use these for our 5G base station backhaul trials. The industrial -40°C to 85°C operating temperature range is the real deal—our outdoor enclosures get boiling in summer but these haven't dropped a single packet.

36 Helpful vote Comments

P***n

United States

Verified Purchase

5 .0

2025-09-22

Great 1310nm 10km optical transceiver. We deployed them in an unconditioned warehouse environment for local distribution layer uplink. Real-time DOM diagnostics make remote maintenance so much easier.

39 Helpful vote Comments

K***x

Canada

Verified Purchase

5 .0

2025-08-12

Bulk order arrived fast, 100% compatible with our aggregation switch.

26 Helpful vote Comments

X***k

Australia

Verified Purchase

4 .0

2025-07-01

Ordered 100 units for a 5G base station backhaul installation. The wide operating temperature range (-40°C to 85°C) is exactly what we need. Delivery was a day late due to a local storm, but the transceivers are installed now and running flawlessly at full line rate. Solid purchase!

12 Helpful vote Comments

T***e

Germany

Verified Purchase

5 .0

2025-06-25

In the telecom space, deployment in remote, unconditioned outdoor cabinets is the ultimate stress test for optical components. We deployed the LS-SM3125-10I across our rural broadband expansion nodes for 25G fronthaul/backhaul routing. The industrial-grade temperature rating is a hard requirement for us due to intense seasonal variations. These modules have survived a brutal winter and are now running through a humid summer inside pole-mounted enclosures. What sets these apart from standard commercial-grade optics is the exceptional thermal dissipation design; even when the ambient internal cabinet temperature spikes to 70°C, the module’s DOM reports internal temperatures well within safe thresholds. Link uptime has remained at a flawless 100%, and the 25GBASE-LR specification matches our dark fiber network characteristics perfectly. If you are a network engineer looking for reliable, hardened 1310nm 10km optical transceivers, look no further. d=(^o^)=b

141 Helpful vote Comments

L***s

Japan

Verified Purchase

5 .0

2025-05-11

Needed some reliable 25G single-mode transceivers for a campus fiber ring upgrade. These LINK-PP modules hit full 25G links over a 7km run effortlessly. The Duplex LC/UPC interface feels rugged and snug. Absolutely no complaints here!

49 Helpful vote Comments

O***e

United Kingdom

Verified Purchase

5 .0

2025-04-20

Passed our 72-hour stress testing under heavy traffic load in our server rooms. No thermal throttling or frame losses detected. SFP28 25G connectivity is super stable. d=(´▽｀)=b

26 Helpful vote Comments

R***e

Russian Federation

Verified Purchase

5 .0

2025-04-10

My order of lan transformer arrived on time. Now they work fine with my Smart Meters.

32 Helpful vote Comments

N***h

Canada

Verified Purchase

5 .0

2025-04-06

Perfect. Order arrived as expected in proper packaging.

56 Helpful vote Comments

Y***g

Mexico

Verified Purchase

5 .0

2025-03-24

Great company to work with. Excellent customer service before and after the sale.

63 Helpful vote Comments

E***g

Bangladesh

Verified Purchase

5 .0

2025-02-15

Best choice and price on the internet.

17 Helpful vote Comments

S***e

United Kingdom

Verified Purchase

5 .0

2025-02-13

High-density deployment in our regional telecom hub. The compact SFP28 form factor leaves plenty of room for airflow. DOM telemetry is perfectly integrated into our monitoring stack. (⌒▽⌒)

25 Helpful vote Comments

W***s

Canada

Verified Purchase

4 .0

2025-01-15

Industrial-grade performance is completely solid; these modules handle our sub-zero outdoor cabinet deployments without a glitch. The shipping took a couple of days longer than promised due to a logistics mix-up at the regional hub. Gladly, the performance and price make up for the wait. (っ˘ڡ˘ς)

20 Helpful vote Comments

i***n

Sweden

Verified Purchase

5 .0

2024-12-19

Product is exactly as described.

42 Helpful vote Comments

M***g

Norway

Verified Purchase

5 .0

2024-11-08

great service, product arrived quickly and was as advertized.

111 Helpful vote Comments

L***i

Brunei Darussalam

Verified Purchase

5 .0

2024-10-15

Speed and quality of service great, will definitely be back!

65 Helpful vote Comments

H***e

South Africa

Verified Purchase

5 .0

2024-10-05

The sales manager for my order was absolutely wonderful. She contacted me as soon as my order hit to verify all the information was correct for what I needed and answered any questions that I had. Impressed by their working efficiency.

86 Helpful vote Comments

B***f

United States

Verified Purchase

5 .0

2024-08-27

Fast shipping, excellent packaging, insanely prompt customer service.

42 Helpful vote Comments

R***n

United States

Verified Purchase

5 .0

2024-08-21

This company supplied the item at a good price, good quality and very quickly.

56 Helpful vote Comments

A***r

United States

Verified Purchase

5 .0

2024-06-24

The 10/25/40G Transceiver Modules and service has been great, we have enjoyed good performance. Response at times is a little slow.

92 Helpful vote Comments

S***n

Philippines

Verified Purchase

5 .0

2024-05-18

Great experience as usual! We have been Link-pp's customers for years! We have never had a problem and have always been able to speak to a real person when ordering something or asking questions.

14 Helpful vote Comments

T***y

United States

Verified Purchase

5 .0

2024-03-08

Great reviews by many professionals within the industry and well thought out shopping experience.

28 Helpful vote Comments

J***u

Hong Kong

Verified Purchase

5 .0

2024-01-24

Their prices are very reasonable and service is great I will highly recommend them

52 Helpful vote Comments

E***s

United Kingdom

Verified Purchase

5 .0

2023-12-14

This company supplied the item at a good price, good quality and very quickly.

66 Helpful vote Comments

U***n

United States

Verified Purchase

5 .0

2023-10-17

As always, on top of the request to supply our needs. Keep up the outstanding work.

57 Helpful vote Comments

F***h

Netherlands

Verified Purchase

5 .0

2023-06-24

The price for 10/25/40G Transceiver Modules is very competitive, in fact better than I've seen elsewhere and the purchase process was flawless. I'd only purchase through l-p.com in the future.

49 Helpful vote Comments

J***k

Iran, Islamic Republic of

Verified Purchase

5 .0

2023-05-25

I was doubtful before purchasingt this product because of its compatiblity issue, but in the end, it is compatible with my devices. I will come again!

51 Helpful vote Comments

J***n

United States

Verified Purchase

5 .0

2023-04-25

I always get high quality goods at a fair price.

43 Helpful vote Comments