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

Name: Cisco SFP-25G-LR-I Compatible LINK-PP 25G SFP28 1310nm 10km Duplex LC/UPC DOM SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 214112
Price: 36.98 USD
Availability: InStock
Rating: 4.9 (24 reviews)

# 214112

Product: Cisco SFP-25G-LR-I Compatible LINK-PP 25G SFP28 1310nm 10km Duplex LC/UPC DOM SMF Optical Transceiver Module (Industrial)
SKU: 214112
P/N: LS-SM3125-10I
Price: $ 43
Stock: 178 in Stock
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Product URL: https://www.l-p.com/products/491478.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-10/25G-LR-I | 10km; SFP-10/25G-LR-S | 10km; SFP-25G-LR-I | 10km; SFP-25G-LR-S | 10km; SFP-25G-ER-S-I | 30km; SFP-25G-iER-S | 30km; SFP-25G-ER-I | 40km; SFP-25G-ER40-S | 40km

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Cisco 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).

Cisco 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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U***d

France

Verified Purchase

5 .0

2025-11-27

Deployed these transceivers for our municipal cell tower backhaul project where 25G links are required to feed modern base stations. Given that these are mounted inside roadside outdoor cabinets subject to extreme vibration and massive temperature swings, commercial-grade optics simply do not survive. The LS-SM3125-10I industrial-grade 25g SFP28 module has been our go-to solution. The Duplex LC connection provides an extremely secure mechanical latch that resists vibration-induced micro-disconnects. Signal integrity remains excellent, and DOM telemetry via CLI shows stable TX power at +0.5dBm and RX power well above the sensitivity limit of -13dBm, even over long patch runs with multiple interconnects. LINK-PP has proven to be a highly reliable module for our optical network infrastructure needs.

127 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

K***x

Canada

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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

Z***m

United States

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5 .0

2025-06-08

Smooth and quick process from the beginning to the end.

108 Helpful vote Comments

O***e

United Kingdom

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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

W***i

Australia

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5 .0

2025-04-19

I bought two to use. They are both OK.

30 Helpful vote Comments

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Canada

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2025-04-06

Perfect. Order arrived as expected in proper packaging.

56 Helpful vote Comments

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2025-03-24

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

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2025-02-15

Best choice and price on the internet.

17 Helpful vote Comments

W***s

Canada

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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

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5 .0

2024-12-19

Product is exactly as described.

42 Helpful vote Comments

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Norway

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2024-11-08

great service, product arrived quickly and was as advertized.

111 Helpful vote Comments

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2024-08-27

Fast shipping, excellent packaging, insanely prompt customer service.

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United States

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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

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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

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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.

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2024-01-24

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

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2023-10-17

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

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J***n

United States

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2023-07-26

On a summit, my partner introduced l-p.com and thought highly of their good products and service. Then I wanted to have a try. I have to say both the customer support and account manager are very professional. They answered my questions about application and recommended the appropriate 10/25/40G Transceiver Modules&Lan Transformer. Thanks for their useful help.

74 Helpful vote Comments

J***k

Iran, Islamic Republic of

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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

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2023-04-25

I always get high quality goods at a fair price.

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