What type of internal transmitter optical assembly is utilized in the SFP28-25G-LR module?

The module incorporates a highly reliable Distributed Feedback (DFB) laser architecture, which maintains spectral stability across long distances under varying thermal loads.

Is the optical port interface compatible with standard APC angled physical connectors?

No, the interface is explicitly designed for Duplex LC/UPC (Ultra Physical Contact) flat connectors. Forcing an APC-angled fiber plug into it will cause high insertion loss.

Does the SFP28-25G-LR use an NRZ or PAM4 modulation scheme for signaling?

This module utilizes standard non-return-to-zero (NRZ) modulation at a serial line rate of 25.78Gbps, ensuring low latency compared to PAM4 optics.

How does the 1.2W power envelope affect high-density Top-of-Rack (ToR) switch deployments?

Its ultra-lean 1.2W draw keeps the switch's overall thermal dissipation low, preventing port-throttling or cooling fans from ramping up to maximum velocity in fully populated 48-port switches.

Does the diagnostic engine comply with the SFF-8472 specification for real-time monitoring of supply voltage and laser bias?

Yes, the built-in DDM framework registers voltage, temperature, bias current, and optical power precisely according to SFF-8472 industry guidelines.

Can we hot-swap this module into a busy line card without disrupting neighboring 25G SFP28 links?

Yes, the module is fully engineered for hot-plugging, allowing clean physical installation without causing power spikes or interrupting adjacent data lanes.

Can this 1310nm single-mode transceiver connect to a 1550nm module on the opposite end of a dark fiber run?

No, both ends of the physical layer span must utilize matching 1310nm center wavelengths to successfully establish optical synchronization.

Does this 10km single-mode SFP module suffer from severe modal dispersion if routed through old legacy single-mode fiber runs?

No, because modal dispersion is primarily a characteristic of multimode infrastructure. When operating at a 1310nm wavelength over standard single-mode fiber, chromatic dispersion is minimal, though legacy fiber quality and patch panel degradation should still be verified to ensure proper attenuation margins.

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HW SFP28-25G-LR Compatible LINK-PP 25G SFP28 1310nm 10km Duplex LC/UPC DOM SMF Optical Transceiver Module

Name: HW SFP28-25G-LR Compatible LINK-PP 25G SFP28 1310nm 10km Duplex LC/UPC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 219258
Price: 29.67 USD
Availability: InStock
Rating: 4.9 (30 reviews)

# 219258

Product: HW SFP28-25G-LR Compatible LINK-PP 25G SFP28 1310nm 10km Duplex LC/UPC DOM SMF Optical Transceiver Module
SKU: 219258
P/N: LS-SM3125-10C
Price: $ 34.5
Stock: 1349 in Stock
Sold: 642
Product URL: https://www.l-p.com/products/477936.htm

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Compatible:: Cisco; LINK-PP; AVAGO; Arista; Brocade; DELL; Edge-Core; Extreme; FS; H3C; HPE Aruba; HPE H3C; HW; Intel; Juniper; Mellanox; Ubiquiti

Compatible P/N:: SFP28-25G-LR | 10km; SFP28-25G-LR-I | 10km

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HW SFP28-25G-LR Compatible LINK-PP 25G SFP28 Specifications

SFP28-25G-LR is a 25G SFP28 single-mode optical transceiver module that engineered for precision data delivery, sustaining an ultra-lean maximum power consumption of 1.2W while driving 1310nm wavelengths across distances up to 10km with integrated DOM diagnostics.

HW Part Number	SFP28-25G-LR	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	MSA Compliant, CPRI, eCPRI

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Q: Does the diagnostic engine comply with the SFF-8472 specification for real-time monitoring of supply voltage and laser bias? By O***n on 2026-04-28

A: Yes, the built-in DDM framework registers voltage, temperature, bias current, and optical power precisely according to SFF-8472 industry guidelines. By admin on 2026-04-29
Q: Can we hot-swap this module into a busy line card without disrupting neighboring 25G SFP28 links? By E***e on 2026-03-15

A: Yes, the module is fully engineered for hot-plugging, allowing clean physical installation without causing power spikes or interrupting adjacent data lanes. By admin on 2026-03-16
Q: Can this 1310nm single-mode transceiver connect to a 1550nm module on the opposite end of a dark fiber run? By C***e on 2025-11-10

A: No, both ends of the physical layer span must utilize matching 1310nm center wavelengths to successfully establish optical synchronization. By admin on 2025-11-11
Q: Does this 10km single-mode SFP module suffer from severe modal dispersion if routed through old legacy single-mode fiber runs? By L***t on 2025-10-18

A: No, because modal dispersion is primarily a characteristic of multimode infrastructure. When operating at a 1310nm wavelength over standard single-mode fiber, chromatic dispersion is minimal, though legacy fiber quality and patch panel degradation should still be verified to ensure proper attenuation margins. By admin on 2025-10-19

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U***l

Belarus

Verified Purchase

5 .0

2026-05-27

Great option for 25G single-mode SFP optical transceivers. We use them for high-capacity uplinks between aggregation points in an air-conditioned colocation facility. SFF-8472 compliance is verified; digital diagnostics report accurate temperature levels.

35 Helpful vote Comments

W***s

Bulgaria

Verified Purchase

5 .0

2026-04-25

Linked up instantly with our edge switches; zero framing errors or alignment slips after a 48-hour soak test.

29 Helpful vote Comments

B***n

Germany

Verified Purchase

5 .0

2026-04-02

Lock-step synchronization at 25.78Gbps directly inside our high-density top-of-rack leaf-spine layout.

27 Helpful vote Comments

V***z

Brazil

Verified Purchase

5 .0

2026-02-22

Deployed a batch of these 1310nm SFP28 modules to handle our new 25G distributed architecture. Our architecture utilizes a multi-vendor leaf-spine layout, and finding reliable, compliant transceivers that don't trigger system alerts can be a headache. These modules initialized perfectly with accurate digital diagnostics monitoring (DDM) readings showing proper internal operating parameters. Transmit and receive power levels are sitting right in the sweet spot over our 6km single-mode fiber links. No signal degradation or frame issues were observed under peak traffic periods. Very solid engineering.

107 Helpful vote Comments

A***r

United Kingdom

Verified Purchase

5 .0

2026-02-08

Shipped quickly for our server room expansion. Deployed these 1310nm 25G SFP28 optics across our distribution tier to handle increased inter-vlan routing traffic. The DOM telemetry gives clean, accurate optical power values directly in our management console.

81 Helpful vote Comments

C***r

Canada

Verified Purchase

5 .0

2026-01-26

Our network engineering team put the LS-SM3125-10C SFP28 module through a rigorous validation lifecycle before clearing it for production deployment. We verified compliance with SFF-8472 digital monitoring specifications and tested the optical receiver sensitivity under simulated attenuation drops. The modules maintained a clean eye pattern and stable bit error rates up to their rated 10km distance over standard SMF. The structural assembly of the SFP28 housing is robust, providing adequate EMI shielding inside high-density line cards.

95 Helpful vote Comments

X***g

Austria

Verified Purchase

5 .0

2026-01-09

Campus Backbone Upgrade Success: We recently migrated our core campus distribution links from 10G to 25G SFP28 to support increased wireless access point density. These 1310nm 10km duplex LC optics were installed across four separate distribution closets. The fiber light launch mechanics are clean, keeping modal dispersion well within acceptable margins over our single-mode runs. Total power draw per module is minimal, keeping our PoE-heavy edge switches running within their thermal design envelopes. Highly recommend these for enterprise network infrastructure upgrades.

93 Helpful vote Comments

D***l

Australia

Verified Purchase

5 .0

2025-11-23

Negligible thermal signature inside the switch cage, staying well within commercial 0-70°C limits under load.

40 Helpful vote Comments

Z***t

United States

Verified Purchase

4 .0

2025-10-31

Pristine optical receiver sensitivity and clean eye patterns during field verification. The bail wire extraction latch is highly secure but feels a little stiff on the initial pull; you just need to exert a bit more even pressure to unlock it from the cage slot.

14 Helpful vote Comments

W***d

Belgium

Verified Purchase

5 .0

2025-09-21

Excellent choice for anyone managing high-density fiber patching. The duplex LC interface provides a tight, secure link, preventing accidental optical misalignment if cables are moved during cabinet reorganization. Clean signals all around.

75 Helpful vote Comments

Y***n

South Africa

Verified Purchase

5 .0

2025-07-12

We utilize these commercial-grade 25G transceivers inside our temperature-controlled indoor cabinets at our regional aggregation points. Operating at 1310nm over single-mode fiber infrastructure, they maintain tight spectral widths. The duplex LC/UPC interface ensures minimal insertion loss upon connection. For anyone managing B2B e-commerce procurement for telco setups, these modules deliver the exact technical specifications required for high-reliability links without the inflated price tags of original branding.

98 Helpful vote Comments

V***s

Brunei Darussalam

Verified Purchase

5 .0

2025-06-03

Solid performance on our 25GbE optical transceiver deployment. We tested these over an 8km single-mode run across our corporate facility, and the received power remained comfortably within the recommended safety margins. No CRC errors.

62 Helpful vote Comments

A***d

France

Verified Purchase

4 .0

2025-04-28

Checked the SFF-8472 compliance and DOM functions; everything reports correctly in our switch OS. The transceivers are commercial-grade (0-70°C), so make sure your indoor cabinet has proper ventilation. Wish they offered a free patch cable in the bulk kits!

19 Helpful vote Comments

J***r

France

Verified Purchase

5 .0

2024-05-18

Quick and reliable service at a competitive price

58 Helpful vote Comments

J***n

United States

Verified Purchase

5 .0

2024-05-17

Not much to say. It works.

74 Helpful vote Comments

C***n

Indonesia

Verified Purchase

5 .0

2024-04-24

Excellent product selection, price, and expedited shipping. Meanwhile, the price is also very reasonable and affordable.

60 Helpful vote Comments

W***i

Argentina

Verified Purchase

5 .0

2024-03-27

The Website is good. I hope to see the product delivered in a reasonable time.

23 Helpful vote Comments

C***o

Israel

Verified Purchase

5 .0

2024-02-22

Good quality for a small price. I know that i buy more from this product.

35 Helpful vote Comments

T***g

Russian Federation

Verified Purchase

5 .0

2024-01-04

Went smoothly. No problem, except the wrong tracking information.

15 Helpful vote Comments

G***y

Republic of Korea

Verified Purchase

5 .0

2023-11-09

Excellent quality compatible 10/25/40G Transceiver Modules ethernet modules, speedily delivered. We always use this supplier.

29 Helpful vote Comments

N***v

Denmark

Verified Purchase

5 .0

2023-10-30

Tested on the following.

16 Helpful vote Comments

R***e

Poland

Verified Purchase

5 .0

2023-10-18

These modules are awesome. They work prefectly. They are recognized right away with the speeds advertised. LINK-PP support has been great with all of our questions and helping us find the right modules for our needs. We will be using LINK-PP again the future for our Fiber needs. Thank you!

28 Helpful vote Comments

t***r

South Africa

Verified Purchase

5 .0

2023-10-08

It arrived in good order and was what I expected and ordered.

18 Helpful vote Comments

B***m

Poland

Verified Purchase

5 .0