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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 |
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.
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.
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.
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.
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.
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.
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 SFP28 module is backed by ISO 9001 for quality management and complies with CE, RoHS, and FCC regulations for safety and environmental standards.
The module passes a rigorous quality testing program that covers optical output, bit-error-rate (BER), and temperature cycling to guarantee long-term stability.
It follows standardized production and control processes to maintain consistent build quality.
Compatibility certification verifies that the transceiver works seamlessly with a broad range of host equipment from leading networking brands.
LINK-PP LS-SM3125-20C is thoroughly tested to confirm consistent transmission and optical stability. Explore details at LINK-PP Test Support Center.
Check wavelength stability and spectral accuracy.
Assess signal quality for clear transmission.
Confirm low error performance during operation.
Ensure stable function under varying temperatures.
Protective packaging and shock resistance safeguard each module. Fast order processing and global delivery ensure prompt arrival.
Prevents static damage to sensitive components.
Minimizes vibration and impact during transit.
Accelerates order handling and shipment release.
Coordinates worldwide shipping and tracking.
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.
LINK-PP offers end-to-end technical support, from pre-sales consultation to post-deployment assistance, ensuring smooth integration and reliable network performance.
Professional guidance to help you select the optimal LS-SM3125-20C module for your network design and application needs.
Validated compatibility with LINK-PP switches and other mainstream networking platforms for seamless deployment.
Comprehensive step-by-step guidance for installation, configuration, and initial setup, ensuring accurate deployment and reliable, stable operation from the start.
Ongoing technical support throughout the product lifecycle, delivering long-term stability for enterprise and carrier-grade networks.
LINK-PP provides after-sales support for the smooth deployment and reliable operation of the optical modules.
15-day no-reason return and refund
Free replacement for dead-on-arrival (DOA) or defective items within the initial period
Free repair services for manufacturing defects throughout the warranty period
Warranty exclusions and conditions apply
Answers key operational questions related to handling, fiber selection, signal issues, and basic troubleshooting.
Compatible | LINK-PP | LINK-PP | LINK-PP | LINK-PP | LINK-PP | LINK-PP |
Data Rate (Max) | 25.78Gbps | 25.78Gbps | 25.78Gbps | 25.78Gbps | 25.78Gbps | 10/25.78Gbps |
Wavelength | 1310nm | 1310nm | 1310nm | 1310nm | 1310nm | 850nm |
Connector | Duplex LC | Duplex LC | Duplex LC | Duplex LC | Duplex LC | Duplex LC |
Cable Distance (Max) | 20km | 10km | 2km | 30km | 40km | 100m |
Cable Type | SMF | SMF | SMF | SMF | SMF | MMF |
TX Power | -1 to +7dBm | -8 to +3dBm | 8 to +3dBm | -8.4~2.4dBm | ||
Receiver Sensitivity | -15 to +3dBm | <-13dBm | -13.3dBm | -19dBm | -19dBm | <-10.3dBm |
Operating Temperature | 0 to 70°C | 0 to 70°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | 0°C to +70°C |
Form Factor | SFP28 | SFP28 | SFP28 | SFP28 | SFP28 | SFP28 |
Transmitter Type | DFB | DFB | DFB | EML | EML | VCSEL |
Receiver Type | PIN | PIN | PIN | APD | APD/TIA | PIN |
Receiver Overload | 2dBm | 2dBm | 2.4dBm | |||
DOM | Supported | Supported | Supported | |||
Protocols | MSA Compliant, CPRI, eCPRI | SFF-8472, SFF-8024, SFF-8431, SFF-8432, CEI-28G-VSR | MSA Compliant, CPRI, eCPRI | MSA Compliant, CPRI, eCPRI | SFF-8472, SFF-8432, SFF-8431 | SFF-8472, SFF-8024, SFF-8431, SFF-8432 |
Extinction Ratio | 3.5dB | >2dB |
| Pictures | ID# | Description | Price | Stock | Add to Cart |
Q: Why did you choose the 1310nm wavelength for a 20km distance instead of 850nm? By U***s on 2026-03-14
A: 850nm is for short-range multi-mode fiber. The 1310nm wavelength travels much further through single-mode fiber with very little signal loss, making 20km possible. By admin on 2026-03-15
Q: Is the outer pull-tab latch resilient enough for frequent hot-swapping in high-density 48-port top-of-rack switches? By S***n on 2026-01-21
A: Yes, the heavy-duty metal housing and reinforced pull-tab are engineered to withstand repeated mechanical insertions in tight, crowded rack environments. By admin on 2026-01-22
Q: Can I run this module near high-voltage power lines inside a factory without signal interference? By V***e on 2025-10-13
A: Yes! Because it uses single-mode fiber optic cable rather than copper, the signal is completely immune to EMI (Electromagnetic Interference) and radio noise. By admin on 2025-10-14
Q: Does the DOM telemetry feature provide accurate real-time internal temperature readings to prevent overheating? By R***n on 2025-09-09
A: Yes, the built-in Digital Optical Monitoring (DOM) tracks real-time internal operating temperature, voltage, and laser bias currents. By admin on 2025-09-10
Q: What is the typical power consumption per module under a full 25Gbps traffic load at 55°C ambient? By T***h on 2025-07-24
A: The power dissipation remains strictly below 1.2W, fully complying with SFP28 MSA guidelines to mitigate localized heat buildup. By admin on 2025-07-25
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