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LS-SM3125-20C 25g sfp28 1310nm 20km duplex lc upc dom smf optical transceiver module
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LINK-PP LS-SM3125-20C 25G SFP28 1310nm 20km Duplex LC/UPC DOM SMF Optical Transceiver Module

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Product summary

Product
LINK-PP LS-SM3125-20C 25G SFP28 1310nm 20km Duplex LC/UPC DOM SMF Optical Transceiver Module
SKU
183256
P/N
LS-SM3125-20C
Price
33,334 €
Stock
720 in Stock
Sold
1.3K
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45 Reviews
5 Questions
1.3K Sold
38.76 € 0% OFF )
Free shipping. For wholesale pricing, please contact us directly.
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Manufacture: LINK-PP P/N: LS-SM3125-20C SKU: 183256
Compatible:
LINK-PP
Shipping:
Free Shipping
to Germany via FedEx
Estimated delivery time : 3 - 10 days.
5-Year Warranty 30-Day Returns 30-Day Exchange
Warranty
  • Providing industry-leading 5-year warranty.
  • Read the table for details of all products' warranty.
Returns & Exchange
  • Refunds will be received about 5 business days after the receipt of returned items.
  • Items in stock for replacement can be shipped within 1 business day.
  • Read the full return policy for details.
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LINK-PP LS-SM3125-20C 25G SFP28 Specifications

LS-SM3125-20C is a 25G SFP28 optical transceiver that pairs a 1310nm DFB laser with duplex LC/UPC interfaces, integrated DOM for real-time diagnostic tracking, and a 1.2W power envelope, all engineered to deliver reliable 20km reach over single-mode fiber under standard link budgets.

LINK-PP Part Number LS-SM3125-20C Vendor Name LINK-PP
Form Factor SFP28 Max Data Rate 25.78Gbps
Wavelength 1310nm Max Cable Distance 20km
Connector Duplex LC Media SMF
Transmitter Type DFB Receiver Type

PIN

Receiver Sensitivity -14dBm Receiver Overload

2dBm

TX Power -1 to +7dBm RX Power -15 to +3dBm
DOM Supported Protocols MSA Compliant, CPRI, eCPRI
Operating Temperature Range 0 to 70°C Extinction Ratio 3.5dB

Key Features of LINK-PP LS-SM3125-20C 25G SFP28

LINK-PP LS-SM3125-20C is a 25G SFP28 transceiver built for 20km single-mode fiber links using a 1310nm DFB laser and duplex LC/UPC connectors. It consumes only 1.2W and includes DOM for live diagnostic readings, while fully adhering to SFP28 MSA, CPRI, and eCPRI specifications. These features together deliver reliable, long-reach optical connectivity in a compact form factor.

LINK-PP LS-SM3125-20C 25G SFP28 Optical Module

This optical module complies with SFP28 MSA, CPRI, and eCPRI standards, making it suitable for both telecom and data-center interconnect. It supports 25Gbps line rate and operates with a 1310nm DFB laser over single-mode fiber.

LS-SM3125-20C: 25 Gbps Connectivity for Campus Aggregation

For campus aggregation, this module enables 25G uplinks over existing SMF infrastructure without replacing the fiber plant. Its 20km reach and low 1.2W power help simplify network upgrades in building-to-building backbones.

LS-SM3125-20C Module with 1310nm Wavelength

The 1310nm wavelength is generated by a DFB laser, providing stable optical output with low chromatic dispersion in SMF. This wavelength is a common choice for medium-range transmission, offering a good balance between attenuation and cost.

LS-SM3125-20C Module Supporting 20km Transmission

This module is specified for links up to 20 kilometers over standard single-mode fiber. It delivers sufficient optical budget to maintain error-free data transfer at 25Gbps across that distance under typical fiber conditions.

LS-SM3125-20C Module with Duplex LC/UPC Interface

The duplex LC/UPC connector ensures a secure, polarized fiber connection with low back reflection due to the UPC polish. This interface is widely deployed, allowing direct plug-and-play integration into existing patch panels and equipment.

LS-SM3125-20C Module with DOM for Real-Time Monitoring

Integrated DOM (Digital Optical Monitoring) provides real-time access to Tx/Rx power, laser temperature, and bias current. This allows network administrators to proactively check link health and diagnose potential faults without interrupting traffic.


LINK-PP LS-SM3125-20C 25G SFP28 Certification

LINK-PP LS-SM3125-20C SFP28 module is backed by ISO 9001 for quality management and complies with CE, RoHS, and FCC regulations for safety and environmental standards.

Optical Transceivers Testing

The module passes a rigorous quality testing program that covers optical output, bit-error-rate (BER), and temperature cycling to guarantee long-term stability.

LS-SM3125-20C Quality Certifications

It follows standardized production and control processes to maintain consistent build quality.

LS-SM3125-20C Certified for Reliable Host-Device Compatibility

Compatibility certification verifies that the transceiver works seamlessly with a broad range of host equipment from leading networking brands.


Rigorous Testing Ensures Reliable SFP28 Performance

LINK-PP LS-SM3125-20C is thoroughly tested to confirm consistent transmission and optical stability. Explore details at LINK-PP Test Support Center.

Optical

Optical Spectrum Test

Check wavelength stability and spectral accuracy.

Optical

Eye Pattern Test

Assess signal quality for clear transmission.

Optical

Bit Error Rate Test

Confirm low error performance during operation.

Optical

Temperature Test

Ensure stable function under varying temperatures.


Product Shipping for LINK-PP LS-SM3125-20C 25G SFP28

Protective packaging and shock resistance safeguard each module. Fast order processing and global delivery ensure prompt arrival.

Anti-Static Protective Packaging

Anti-Static Protective Packaging

Prevents static damage to sensitive components.

Shock-Resistant Transport Protection

Shock-Resistant Transport Protection

Minimizes vibration and impact during transit.

Fast Order Processing and Dispatch

Fast Order Processing and Dispatch

Accelerates order handling and shipment release.

Global Logistics and International Delivery

Global Logistics and International Delivery

Coordinates worldwide shipping and tracking.

LINK-PP LS-SM3125-20C 25G SFP28 Usage Demonstration

LINK-PP LS-SM3125-20C supports straightforward installation with hot-pluggable SFP28 interfaces and standard LC connectors. It is suitable for 25G network interconnects in campus, aggregation, and telecom environments, providing consistent data transmission across single-mode fiber links up to 20km.

LS-SM3125-20C Technical Support

LINK-PP offers end-to-end technical support, from pre-sales consultation to post-deployment assistance, ensuring smooth integration and reliable network performance.

Pre-Sales Technical Consultation

Pre-Sales Technical Consultation

Professional guidance to help you select the optimal LS-SM3125-20C module for your network design and application needs.

Compatibility Verification Support

Compatibility Verification Support

Validated compatibility with LINK-PP switches and other mainstream networking platforms for seamless deployment.

Deployment & Installation Assistance

Deployment & Installation Assistance

Comprehensive step-by-step guidance for installation, configuration, and initial setup, ensuring accurate deployment and reliable, stable operation from the start.

Long-Term Technical Assurance

Long-Term Technical Assurance

Ongoing technical support throughout the product lifecycle, delivering long-term stability for enterprise and carrier-grade networks.

LINK-PP LS-SM3125-20C 25G SFP28 After-Sales Assurance

LINK-PP provides after-sales support for the smooth deployment and reliable operation of the optical modules.

15 days

15-day no-reason return and refund

Free maintenance or replacement

Free replacement for dead-on-arrival (DOA) or defective items within the initial period

Free maintenance

 Free repair services for manufacturing defects throughout the warranty period

Limitations

Warranty exclusions and conditions apply

LINK-PP LS-SM3125-20C 25G SFP28 FAQ

Answers key operational questions related to handling, fiber selection, signal issues, and basic troubleshooting.

Yes, always ground yourself and handle the module by its edges; keep it in the antistatic bag until installation.
Use standard 9/125μm single-mode fiber with LC connectors.
Fiber attenuation, dirty connectors, or poor splicing can cause loss.
Clean the LC connectors with a proper fiber cleaner, check for tight bends or splices in the fiber path, and ensure the fiber length does not exceed 20km.

Model Comparison Table

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Y***d
Brunei Darussalam
Verified Purchase
5 .0
2026-04-28
Our engineering firm just finalized a network overhaul for a logistics hub. We utilized these 25G 1310nm 20km SMF modules for the primary uplink between the main admin building and the remote sorting facility. The fiber pathway is laid adjacent to high-voltage lines, so going optical with single-mode fiber was mandatory to avoid EMI. The transceivers have been running for 30 days straight. DOM data logs show completely flat lines for temperature and voltage, proving the internal components are premium grade.
I***l
Cambodia
Verified Purchase
5 .0
2026-04-14
Upgraded our storage area network (SAN) interconnects with these. The duplex LC connector has a nice, reassuring click when seating. If you need cheap but reliable 25G 20km SFP modules, this is it.
R***n
Bangladesh
Verified Purchase
5 .0
2026-04-09
Our network engineering team is quite picky about third-party transceivers, but these 25G 1310nm 20km modules passed all our stress tests. DOM metrics are very precise.
M***l
Nepal
Verified Purchase
5 .0
2026-03-25
Installed these 25G optical transceivers for our remote office backhaul. Total length is around 18km of dark fiber. Latency is minimal and the 25Gbps bandwidth is rock solid. Great job on the firmware coding.
E***n
Israel
Verified Purchase
5 .0
2026-03-12
Replaced some pricey OEM transceivers with these LS-SM3125-20C SFP28 modules for our enterprise core uplink. The DOM (Digital Optical Monitoring) readings perfectly match our original specs. Rx/Tx power levels are well within the safe threshold. High quality.
T***t
New Zealand
Verified Purchase
5 .0
2026-03-02
Smooth sailing from ordering to installation. The Duplex LC/UPC interface aligns perfectly with standard single-mode patch cables. Link aggregation is working fine at 25G.
K***m
Malaysia
Verified Purchase
5 .0
2026-02-25
Perfect for our 25G enterprise network upgrade. We did an extensive bit error rate (BER) test on a 12km SMF spool before deployment, and it came back flawless. Glad we chose these over overpriced tier-1 brands.
C***y
Belarus
Verified Purchase
5 .0
2026-02-19
Spot-on compatibility. 25G rate is stable. Thumbs up!
V***r
United States
Verified Purchase
5 .0
2026-02-05
Doing local GEO network expansion for a medical data center cluster in Ohio. We needed reliable 20km single-mode fiber transceivers capable of handling 25Gbps line rates for real-time imaging replication. These transceivers did not disappoint. The commercial operating temperature range (0°C to 70°C) is perfect for our climate-controlled hot/cold aisle setups. We’ve been pushing sustained 24Gbps throughput during off-peak database mirrors, and the optical link has remained rock solid without a single CRC error.
O***d
Canada
Verified Purchase
5 .0
2026-01-20
Solid build quality on the casing and pull-tab. The 1310nm single-mode optical transceiver spec is exactly what we needed for our long-haul campus interconnects. Solid 5 stars.
A***d
United States
Verified Purchase
4 .0
2026-01-14
Great 25G SFP28 modules. The DDM/DOM telemetry updates every few seconds on our dashboard, which is great. The bulk discount tier could be a bit more aggressive for mid-sized enterprise orders, but the retail price is already fair.
G***n
United States
Verified Purchase
5 .0
2026-01-07
Excellent 25G SFP28 SMF transceiver for municipal ISP rollouts. We deployed a batch of these in Austin, TX for local GEO fiber loops. The 1310nm wavelength holds up great over the rated distance.
S***r
Morocco
Verified Purchase
5 .0
2025-12-16
Using these in an indoor telecom closet with tight ventilation. They run surprisingly cool for 25G optics. No thermal throttling or link flapping. Highly recommend for enterprise deployment.
B***r
Denmark
Verified Purchase
5 .0
2025-11-22
Outstanding 25G 1310nm optics. Saved our IT budget a massive chunk this quarter.
F***e
Turkey
Verified Purchase
5 .0
2025-11-18
Using these for a 15km single-mode fiber (SMF) run between our main building and the warehouse distro switch. Registered full 25Gbps instantly on our Aggregation switches. Super clean signal over duplex LC.
W***g
Taiwan, Province of China
Verified Purchase
5 .0
2025-10-25
Outstanding product for telecom infrastructure contractors. We purchased a bulk order of these 25G SFP28 20km transceivers for an enterprise fiber-to-the-building (FTTB) contract. The duplex LC single-mode fiber setup made it easy to patch into existing fiber distribution boxes. Having onboard Digital Optical Monitoring (DOM) allowed our field techs to instantly verify Tx/Rx power levels during commission without needing external light meters. Truly a time-saver for high-density deployments.
N***h
Bulgaria
Verified Purchase
5 .0
2025-09-14
Shoutout to the support team for confirming vendor compatibility beforehand! These work flawlessly on our switches and routers. Real commercial-grade 25G SFP28 performance.
J***y
Libyan Arab Jamahiriya
Verified Purchase
5 .0
2025-08-14
Running these optical transceivers in our indoor server room. DDM data is pulling perfectly via SNMP. Thermals are sitting steady around 40°C, well below the commercial operating temperature limit.
A***t
Poland
Verified Purchase
5 .0
2025-07-23
Solid 25G SFP28 optics. Best price-to-performance ratio for 1310nm 20km runs.
U***h
Lithuania
Verified Purchase
5 .0
2025-07-07
Deployed these 25G SFP28 1310nm modules for our high-frequency trading (HFT) local server room interconnects where jitter and packet loss must be absolute zero. The duplex LC/UPC connectors provide a rigid, low-loss physical connection. Our monitoring software tracking real-time DOM shows the laser bias current is completely stable. These modules strictly adhere to IEEE 802.3cc and SFF-8472 protocols, which makes them highly reliable for strict compliance environments. Will definitely add LINK-PP to our approved hardware list.
P***e
Philippines
Verified Purchase
5 .0
2025-06-11
Excellent option for upgrading 10G links to 25G SFP28. Didn't have to change any of our existing single-mode duplex LC fiber cabling infrastructure. Immediate ROI for our IT infrastructure team.
Z***t
Germany
Verified Purchase
4 .0
2025-05-27
Solid 25G 1310nm 20km performance, but the pull-tab latch color was slightly different from our existing inventory, which triggered my OCD. Performance-wise, they are flawless and DOM is reading accurately.
D***e
Germany
Verified Purchase
5 .0
2025-05-08
Fast shipping to Frankfurt, German tech team tested them—all green! ✨
H***e
United States
Verified Purchase
5 .0
2025-04-22
Our data center transit lines needed a serious bump from 10G to 25G. These 25G 1310nm 20km optics fit the budget perfectly. No issues with standard duplex LC/UPC patch cords. Delivery to Seattle was fast.
L***h
United States
Verified Purchase
5 .0
2025-03-21
Doing some local network infrastructure contracting in Boston, and the client requested 25G SFP28 optics for their multi-mode to single-mode migration. These 1310nm transceivers handled the 20km single-mode link flawlessly.
P***n
Denmark
Verified Purchase
5 .0
2024-08-19
I appreciated how Fast the process was and how great the 10/25/40G Transceiver Modules work with my switches.
L***c
Argentina
Verified Purchase
5 .0
2024-07-15
Every thing went smooth. I had a question and called, they helped me right away.
Y***a
Netherlands
Verified Purchase
5 .0
2024-07-12
So far so good, let's see if the delivery is as smooth.
D***o
Israel
Verified Purchase
5 .0
2024-03-06
Great price. Fast delivery. What more can I say.
g***o
New Zealand
Verified Purchase
5 .0
2024-02-06
Works perfect, recommended!
J***r
Spain
Verified Purchase
5 .0
2024-01-27
Will absolutely purchase from you soon. Pretty good.
H***r
United States
Verified Purchase
5 .0
2024-01-13
Great experience. I did an online chat to verify a question and they were clear and helpful and then I placed my order.
B***o
Italy
Verified Purchase
5 .0
2023-12-27
Received in 7 days, very good.
J***n
Israel
Verified Purchase
5 .0
2023-12-21
Another flawless transaction - got exactly what I ordered in a timely fashion!
S***n
Israel
Verified Purchase
5 .0
2023-11-12
Really poor customer service.
R***n
United States
Verified Purchase
5 .0
2023-10-10
I got exactly what I wanted and received them in a very timely manner. Satisfied
G***z
Libyan Arab Jamahiriya
Verified Purchase
5 .0
2023-09-23
Order was correct and shipped out quickly, best price on the web. Cannot ask for more!
T***g
Ireland
Verified Purchase
5 .0
2023-09-06
The quality doesn't let me down! Highly recommend l-p.com.
S***r
Italy
Verified Purchase
5 .0
2023-08-09
Quick to provide a quote, easy to work with, and the product shipped promptly.
P***g
France
Verified Purchase
5 .0
2023-08-04
The shopping experience is amazing. The Account Manager is so nice and considerate. She helped a lot during the purchaing.Even after I placed my order, she contuined to send emails to inform me about the logistic.
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