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The LINK-PP LS-SM554G-40I is a high-performance 4.25G SFP transceiver developed for long-distance telecommunications over single-mode fiber, particularly in challenging industrial situations. Its key specifications are a data throughput of 4.25 Gbps, a transmission range of 40 km, an operational wavelength of 1550 nm, and a duplex LC fiber interface.
| LINK-PP Part Number | LS-SM554G-40I | Vendor Name | LINK-PP |
| Form Factor | SFP | Max Data Rate | 4.25Gbps |
| Wavelength | 1550nm | Max Cable Distance | 40km |
| Connector | LC duplex | Media | SMF |
| Optical Components | DFB 1550nm | DOM Support | Yes |
| Receiver Sensitivity | < -17.5dBm | TX Power | -2 to +4dBm |
| Industrial Temperature Range | -40 to 85°C | Protocols | MSA Compliant |
The LINK-PP LS-SM554G-40I SFP module offers dependable high-speed connectivity operating at speeds of up to 4.25 Gbps over single-mode fiber, enabling transmission distances reaching 40 km. It features Digital Optical Monitoring (DOM) for real-time performance data and a duplex LC connector for easy, low-loss installation.
Incorporating a DFB laser transmitter paired with a PIN photodiode receiver, this LINK-PP LS-SM554G-40I 4.25G SFP module’s architecture ensures precise signal transmission, exceptional optical performance, and robust thermal stability, delivering reliable operation in wide-temperature industrial environments.
The LINK-PP LS-SM554G-40I module supports data rates of up to 4.25 Gbps, providing reliable, high-speed, long-reach fiber network connectivity, even in mission-critical applications.
By operating at the 1550nm wavelength, the LINK-PP LS-SM554G-40I module reduces single-mode fiber attenuation and maintains strong signal integrity across extended distances.
The LINK-PP LS-SM554G-40I 4.25G SFP module transmits data up to 40 km over single-mode fiber, ideal for metropolitan area networks (MANs), campus backbones, and industrial facility connections.
The duplex LC interface streamlines cabling with separate Tx/Rx paths in a compact connector, fully supports single-mode fiber, and ensures stable, low-reflection connections that stay secure during installation, operation, and maintenance.
Its Digital Optical Monitoring (DOM) support allows you to access real-time data on temperature, voltage, laser bias current, and optical power levels, facilitating monitoring, speeding up troubleshooting, and enabling proactive maintenance.
Built upon ISO 9001-certified manufacturing excellence and holding CE, RoHS, and FCC compliance certifications, the LINK-PP module delivers a reliable, internationally compliant solution.
Each unit passes multiple quality checkpoints before shipment, verifying optical parameters, electrical characteristics, and environmental resilience.
Worldwide regulatory approvals bolster product credibility, ensuring lasting robustness and reliable network performance.
Extensive validation procedures guarantee flawless integration across the full range of LINK-PP switching, routing, and networking equipment.
Spectrum, eye pattern, BER, and temperature testing are among the multiple validation stages used to ensure reliable module performance. Further information is available at the LINK-PP Test Support Center.
Guarantees accurate wavelength alignment and compliance with optical specifications.
Reviews waveform structure to maintain signal clarity and minimize noise.
Verifies low error transmission for stronger network stability.
Confirms consistent module operation even in harsh temperature conditions.
LINK-PP ensures that each module is ready for installation when it reaches the customer, supported by specialized logistics operations that protect the product and improve the speed and reliability of global delivery.
Prevents ESD damage, preserving product performance during transit and storage.
Uses robust packaging to prevent physical damage from handling and shipping stresses.
Streamlines packing, quality checks, and dispatch for faster customer response.
Ensures reliable worldwide shipping with predictable arrival times.
The LINK-PP LS-SM554G-40I 4.25G SFP is optimized for industrial environments, 4Gbps optical systems, 1x/2x/4x Fibre Channel storage networks, SONET telecom applications, and any long-haul optical link demanding 4.25 Gbps data rates over 40km of single-mode fiber.
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-SM554G-40I module for your network design and application needs.
Compatibility checks and validation to ensure seamless operation with Cisco switches and other supported networking platforms.
Step-by-step support for installation, configuration, and initial deployment to ensure stable and correct operation.
Ongoing technical support throughout the product lifecycle to ensure reliable performance in 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
Find clear answers below regarding compatibility, performance specifications, and application scenarios.
Compatible | LINK-PP | LINK-PP | LINK-PP | LINK-PP | LINK-PP | LINK-PP |
Data Rate (Max) | 4.25Gbps | 4.25Gbps | 4.25Gbps | 4.25Gbps | 4.25Gbps | 4.25Gbps |
Wavelength | 1550nm | 1310nm | 1310nm | 850nm | 850nm | 1550nm |
Connector | LC duplex | LC duplex | Duplex LC | Duplex LC | Duplex LC | LC duplex |
Cable Distance (Max) | 40km | 2km | 10km | 500m | 300m | 40km |
Cable Type | SMF | SMF | SMF | MMF | MMF | SMF |
TX Power | -2 to +4dBm | -8 to -3dBm | -9 to 0dBm | -9 to 0dBm | -2 to +4dBm | |
Receiver Sensitivity | < -17.5dBm | < -18dBm | -16 to -1dBm | -16 to -1dBm | < -17.5dBm | |
Form Factor | SFP | SFP | SFP | SFP | SFP | SFP |
Optical Components | DFB 1550nm | DFB 1310nm | DFB 1550nm | |||
DOM Support | Yes | Yes | Yes | |||
Industrial Temperature Range | -40 to 85°C | |||||
Protocols | MSA Compliant | MSA Compliant | MSA Compliant | MSA Compliant | MSA Compliant | MSA Compliant |
| Pictures | ID# | Description | Price | Stock | Add to Cart |
A: Yes. This module is designed for transmission over standard single-mode fiber with a maximum reach of 40 km. The industrial version supports an operating temperature range of -40°C to +85°C, making it suitable for outdoor cabinets, factory automation, utility networks, and other harsh environments. When installed within the specified optical power budget and supported Fibre Channel standards, it delivers stable long-term performance. By admin on 2026-06-28
Q: Has anyone tested this module with Cisco MDS, Brocade, IBM, or other OEM Fibre Channel switches? Any compatibility issues during long-term production use? By M***z on 2026-05-30
A: Yes. The LS-SM554G-40I is manufactured in compliance with the MSA standard and supports OEM coding for a wide range of Fibre Channel platforms. It has been widely deployed with Cisco, Brocade, IBM, and other compatible storage networking equipment. If you have a specific switch model, feel free to contact us and we'll verify compatibility before shipment. By admin on 2026-05-30
Q: We're planning a storage upgrade requiring around 150 modules. Does LINK-PP offer better pricing for bulk purchases or support custom OEM labels for large projects? By J***n on 2025-08-05
A: Absolutely. We provide volume discounts for enterprise and system integrator projects. OEM labeling, customized EEPROM coding, private branding, and project-based quotations are also available. Simply send us your required quantity and compatible device models, and we'll prepare the most competitive proposal. By admin on 2025-08-05
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