LINK-PP LS-SM3125-30I is an industrial-grade 25GBASE-ER SFP28 transceiver featuring a 1310nm EML laser and duplex LC/UPC interface, supporting up to 30km transmission over single-mode fiber with a defined optical power budget and tolerance to chromatic dispersion per ER specifications, alongside integrated DOM for real-time monitoring of Tx/Rx optical power and temperature.
LINK-PP Part Number
LS-SM3125-30I
Vendor Name
LINK-PP
Form Factor
SFP28
Max Data Rate
25.78Gbps
Wavelength
1310nm
Max Cable Distance
30km
Connector
Duplex LC
Media
SMF
Transmitter Type
EML
Receiver Type
APD
Receiver Sensitivity
-19dBm
Operating Temperature range
-40°C to +85°C
Protocols
MSA Compliant, CPRI, eCPRI
Warranty
5 Years
Key Features of LINK-PP LS-SM3125-30I 25G SFP28
LINK-PP LS-SM3125-30I is an industrial-grade 25GBASE-ER SFP28 transceiver that operates at 1310nm and reaches 30km over single-mode fiber using a duplex LC/UPC interface. It integrates DOM for live optical monitoring and is fully compliant with MSA, CPRI, and eCPRI specifications. This combination of long reach, rugged design, and standard compliance makes it a versatile optical module for demanding links.
LINK-PP LS-SM3125-30I 25G SFP28 Optical Module
This module meets SFP28 MSA requirements and supports CPRI as well as eCPRI data rates for fronthaul and backhaul applications. It is built with an industrial-temperature grade to ensure stable operation in outdoor or uncontrolled environments. Its optical design follows the 25GBASE-ER standard for consistent performance.
LS-SM3125-30I: 25 Gbps Connectivity for Long-Reach Fronthaul
It is designed to support long-reach fronthaul links with stable 25Gbps data transmission. The module enables efficient data transport between remote radio units and baseband units over extended distances.
LS-SM3125-30I Module with 1310nm Wavelength
The 1310nm wavelength offers low attenuation and moderate chromatic dispersion over standard single-mode fiber. It is a well-chosen band for 25G ER links because it balances reach and cost. This wavelength also simplifies laser design and enables stable output power.
LS-SM3125-30I Module Supporting 30km Transmission
The module delivers a full 30km transmission distance on G.652 single-mode fiber with a sufficient optical budget. This distance covers typical metro rings, campus interconnects, and remote site links. It adheres to the 25GBASE-ER power and sensitivity specifications for error-free data transfer.
LS-SM3125-30I Module with Duplex LC/UPC Interface
The duplex LC/UPC connector provides a low-loss and secure physical interface for fiber patch cords. Its UPC polish minimizes back reflection, which helps maintain signal integrity at 25Gbps. This interface is widely used in telecom and data-center environments, ensuring easy deployment.
LS-SM3125-30I Module with DOM for Real-Time Monitoring
Digital Optical Monitoring (DOM) gives real-time access to key parameters such as Rx/Tx power, laser bias current, temperature, and supply voltage. This data helps operators quickly detect fibre degradation or connector issues. DOM also simplifies link planning by providing precise margin measurements.
LINK-PP LS-SM3125-30I 25G SFP28 Certification
LINK-PP LS-SM3125-30I is manufactured under strict quality standards and complies with ISO 9001, CE, RoHS, and FCC certifications to ensure safety and reliability.
The module goes through extensive optical, electrical, and temperature cycling tests to ensure stable operation over its entire industrial‑grade range.
LS-SM3125-30I Quality Certifications
This transceiver carries recognized industry certifications that validate its design, production processes, and material safety.
This product is in conformity with ISO9001. This system is valid to a company engaging in development, production and supply service of fiber optical products. Please contact us to learn more.
ISO/IEC 27001 is an international standard for managing and processing information security. This standard is jointly developed by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). It sets out requirements for establishing, implementing, maintaining, and continually improving an information security management system (ISMS). Ensuring the confidentiality, integrity, and availability of organizational information assets, obtaining an ISO 27001 certificate means that the enterprise has passed the audit conducted by a certification body, proving that its information security management system has met the requirements of the international standard. Please contact us to learn more.
This product is in conformity with ISO14001.It is intended for use by an organization seeking to manage its environmental responsibilities in a systematic manner that contributes to the environmental pillar of sustainability. Please contact us to learn more.
ISO 45001 is a global standard that sets out the requirements for an occupational health and safety management system (OH&SMS).
REACH is a European Union regulation concerning the Registration, Evaluation, Authorization and Restriction of Chemicals. It came into force on 1st June 2007 and replaced a number of European Directives and Regulations with a single system. The regulation aims to protect human health and environmental safety, maintain and improve the competitiveness of the EU chemical industry, and develop innovative capabilities for non-toxic and harmless compounds to prevent market fragmentation, increase the transparency of the use of chemicals, promote non-animal experiments, and pursue sustainable social development.Please contact us to learn more.
This product meets the applicable requirements of Directive (EU) 2015/863 of RoHS. It restricts the use of 10 hazardous materials in the manufacture of various types of electronic and electrical equipment: lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers, and four different phthalates. Please contact us to learn more.
This product fully accords with the FCC, which aims to manage the radio wave and magnetic fields more reasonably. Please contact us to learn more.
CB is an international system operated by IECEE. This product is based on IEC standards for testing the safety performance of electrical products. Please contact us to learn more.
This product fully accords with UKCA (UK Conformity Assessed) certificate, which signifies that it meets all relevant quality standards as well as health and safety requirements. Please contact us to learn more.
UL certification is a non-mandatory certification in the United States,mainly testing and certification of product safety performance.Its ultimate purpose is to obtain products with a fairly safe level for the market,and to contribute to ensuring human health and property safety.Please contact us to learn more.
LS-SM3125-30I Certified for Reliable Host-Device Compatibility
It is verified for seamless interoperability with a wide range of mainstream switches and servers through rigorous signal‑integrity and handshake testing.
LINK-PP LS-SM3125-30I undergoes strict testing to ensure stable optical performance and consistent operation. For more, refer to the LINK‑PP Test Support Center.
Optical Spectrum Test
Verifies laser wavelength and output power stability.
Eye Pattern Test
Checks signal quality via open eye margins.
Bit Error Rate Test
Measures error‑free data transmission over distance.
Temperature Test
Ensures full operation across industrial temperature range.
Product Shipping for LINK-PP LS-SM3125-30I 25G SFP28
LINK-PP LS-SM3125-30I SFP28 module is packed and handled to ensure safe delivery. Orders are processed quickly for timely shipment.
Plug the LS-SM3125-30I module into a standard SFP28 port, connect duplex LC/UPC fiber, and enable DOM for live diagnostics. It supports 25G Ethernet links up to 30km, ideal for 5G fronthaul, metro access, and industrial backhaul networks where long reach and rugged reliability are essential.
LS-SM3125-30I 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
Professional guidance to help you select the optimal LS-SM3125-30I module for your network design and application needs.
Compatibility Verification Support
Validated compatibility with LINK-PP switches and other mainstream networking platforms for seamless deployment.
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
Ongoing technical support throughout the product lifecycle, delivering long-term stability for enterprise and carrier-grade networks.
A:
Yes, the rugged metal alloy casing and latching duplex LC mechanism prevent signal loss caused by physical mechanical vibration. By
admin on
2026-03-02
A:
No, the LS-SM3125-30I is a single-mode SFP transceiver; running it over multi-mode fiber will cause severe optical attenuation and packet loss. By
admin on
2026-01-27
Used these 25G 1310nm optical modules to connect our primary data center to a disaster recovery site 16 miles away. Latency is rock solid, and DDM monitoring integrates smoothly with our NMS dashboard via SNMP. Enterprise-grade performance at a fraction of standard vendor pricing!
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491664
364798
S***n
Sweden
Verified
Purchase
5 .0
2026-03-29
Great value for 25G SFP28 optical modules. The metal enclosure feels durable and dissipates heat very effectively. Deployed on our edge routers for a 5G front-haul pilot project. Very satisfied with overall optical reliability!
Please write comments with more than three
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491664
364806
J***e
Denmark
Verified
Purchase
5 .0
2026-02-16
We conducted a comprehensive optical bench test on the LINK-PP LS-SM3125-30I transceiver before deploying 40 units across our municipal fiber network. Using an optical spectrum analyzer, we verified a steady 1310nm center wavelength powered by a precision EML laser and a high-sensitivity APD receiver, yielding an impressive power budget. On our 28km OS2 single-mode fiber span with multiple patch panels, the module established a rock-solid 25Gbps link on our core switches without throwing vendor alarms. DDM telemetry reported real-time Tx/Rx optical power with pinpoint accuracy compared to our inline power meter. Exceptional engineering for high-demand network deployments!
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491664
364795
L***s
Canada
Verified
Purchase
5 .0
2026-01-22
We deployed 20 of these LINK-PP LS-SM3125-30I SFP28 transceivers for an inter-building fiber trunk over 22km. The EEPROM came properly pre-coded for our enterprise switches, and the link locked at 25Gbps immediately without needing to force port speeds. Very impressed with the hardware build quality!
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491664
364800
K***e
Romania
Verified
Purchase
4 .0
2026-01-21
The LS-SM3125-30I transceivers themselves are outstanding! Plugged into our 25G core switches and established a clean link over 22km immediately. Deducted one star only because shipping delayed delivery by two days due to weather, which pushed back our maintenance window slightly. Optic performance is 5/5!
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491664
364812
B***z
Italy
Verified
Purchase
5 .0
2025-12-30
Purchased a batch of 50 for our regional metro ring backhaul. Compatibility across our main distribution routers was 100% plug-and-play. The duplex LC connector latches firmly with a solid tactile click. Will definitely keep ordering from LINK-PP.
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491664
364802
D***n
Sweden
Verified
Purchase
5 .0
2025-11-18
We manage tower setups in northern Sweden where winter temperatures drop below -30°C. These industrial-grade 25G 30km SFP28 modules handled the arctic cold effortlessly. Laser output power remained stable throughout freezing winter storms.
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491664
364794
C***z
Finland
Verified
Purchase
4 .0
2025-11-01
Excellent 25G SFP28 1310nm optical modules. Tested over 28km of OS2 single-mode fiber with a perfect optical power budget. Docked one star because local customs clearance in Finland took 3 days longer than estimated. Customer support provided tracking updates quickly though. Stellar hardware!
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491664
364813
R***s
Norway
Verified
Purchase
5 .0
2025-10-07
Solid performance for campus aggregation switches. Tested compatibility across multiple switch platforms in our lab, and the DOM features work accurately. Will be adopting these as our standard 25G 30km SFP optics across all regional sites.
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491664
364797
S***n
Germany
Verified
Purchase
5 .0
2025-08-02
Deploying an enterprise data center interconnect link between our two regional facilities over a 27km dark fiber ring required reliable long-reach optics. We inserted these LINK-PP 25G SFP28 30km modules into our aggregate switch chassis, and the pre-coded EEPROM enabled immediate recognition as a native 25GBASE-ER equivalent transceiver. Over a 72-hour PRBS31 stress test under full line-rate traffic, internal temperatures stabilized nicely inside our uncooled edge racks. Real-time DDM optical monitoring via SNMP integrated seamlessly into our NMS dashboard, showing zero CRC errors, zero packet drops, and steady receiver power levels throughout the trial.
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491664
364810
E***z
Netherlands
Verified
Purchase
5 .0
2025-07-03
Installed on our top-of-rack 25G switches. Absolutely no vendor lock warnings thrown! Standard duplex LC single-mode fiber patch cords fit snugly. Signal attenuation over 24km of OS2 SMF was minimal. Highly recommended long-reach optics.
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491664
364804
W***z
Australia
Verified
Purchase
5 .0
2025-06-05
Outstanding 25GBASE-ER SFP28 optics! We specifically needed industrial temperature tolerance for outdoor cabinets along railway tracks. These 1310nm modules have been running for 3 months in harsh conditions with zero optical signal degradation. Perfect for rugged environment deployments.
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491664
364801
J***r
Finland
Verified
Purchase
5 .0
2025-05-24
Connecting rural wireless towers back to our primary fiber point of presence required a high-capacity 25G optical link over 26km of leased dark fiber. Initial concerns regarding optical loss over nearly 30km were completely dispelled during turn-up testing. The high-sensitivity APD receiver paired with the EML laser provided an effective link budget that easily handled our span loss. The link negotiated at full 25G speed instantly on our edge routers, and we have logged zero link flaps or optical power alarms over 90 days of continuous operation.
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character.
491664
364796
T***n
Poland
Verified
Purchase
5 .0
2025-03-25
Deploying 25GbE backhaul trunks across electric utility substations requires strict immunity to electrical noise and wide thermal fluctuations. We installed these 25G SFP28 1310nm modules inside ruggedized industrial switches inside high-voltage substations. The durable metal enclosure provides superb EMI shielding, while operational testing across a 22km fiber loop yielded extremely clean optical eye diagrams with minimal jitter. The DDM diagnostic interface mapped directly into our SCADA monitoring system via SNMP traps, giving us instant visibility into subtle changes in optical attenuation for critical utility infrastructure.
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