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The Cisco QSFP-4W20-100G-I Compatible LINK-PP module is an industrial-grade 100G QSFP28 LR4 transceiver utilizing LAN-WDM technology to transmit data over single-mode fiber up to 20km. Operating at a 1310nm Central wavelength with a duplex LC interface, it integrates Digital Diagnostics Monitoring for real-time performance tracking in harsh environmental conditions.
| Cisco Part Number | QSFP-4W20-100G-I | Vendor Name | LINK-PP |
| Form Factor | QSFP28 | Max Data Rate | 100Gbps |
| Max Wavelength | 1310nm | Max Cable Distance | 20km |
| Connector | Duplex LC | Media | SMF |
| Transmitter Type | EML | Receiver Type | PIN |
| DDM/DOM | Supported | Operating Temperature Range | -40°C to +85°C |
| Modulation (Electrical) | 4x 25G-NRZ | Modulation (Optical) | 4x 25G-NRZ |
| Protocols | QSFP28 MSA,IEEE 802.3-2018,4WDM-20,SFF-8661,SFF-8636 | Warranty | 5 Years |
Engineered for robust high-speed networks, this module serves as an advanced alternative to standard 100G QSFP28 LR4 optics by extending the reliable transmission reach to 20km over single-mode fiber. It features a hardened industrial temperature range and utilizes precise LAN-WDM grids, making it highly ideal for demanding telecommunications and edge computing environments.
Delivering industrial-grade reliability, this transceiver provides extended 20km reach capabilities, offering a highly resilient solution for network architectures typically relying on standard 100G QSFP28 LR4 modules.
Providing massive bandwidth capacity, this module ensures ultra-low latency and seamless data aggregation required for next-generation mobile infrastructure. Its robust design maintains stable 100Gbps throughput even in outdoor, non-climate-controlled telecom enclosures.
Utilizing Local Area Network Wavelength Division Multiplexing, this transceiver multiplexes four distinct wavelengths onto a single fiber pair. This significantly maximizes existing fiber plant utilization while minimizing signal dispersion over extended optical links.
Operating on the precise IEEE 802.3ba LAN-WDM grid, these tightly spaced optical channels ensure minimal chromatic dispersion. This precise wavelength assignment guarantees optimal signal integrity and compliance with high-speed transmission standards.
Designed with high-sensitivity receivers and powerful optical lasers, this 100G QSFP28 LR4 module effortlessly bridges distances up to 20 kilometers on standard single-mode fiber. It provides superior link budgets for metropolitan area networks and extended campus connectivity.
Equipped with an industry-standard duplex LC optical receptacle, this module ensures seamless integration into existing high-density patching environments. The secure latching mechanism provides reliable, low-insertion-loss physical connections for critical data routing.
Built-in Digital Optical Monitoring allows network administrators to proactively track critical parameters such as temperature, optical transmit and receive power, and laser bias current. This facilitates predictive maintenance and minimizes network downtime.
The QSFP-4W20-100G-I 100G QSFP28 LR4 module strictly adheres to international MSA standards and environmental directives to ensure safe, compliant network operations globally.
Each 100G QSFP28 LR4 transceiver undergoes rigorous multi-stage evaluation to verify optical performance and mechanical durability in extreme industrial conditions.
The product holds essential global certifications including CE, FCC, and RoHS, confirming its strict adherence to safety and environmental regulations.
Extensively coded and validated across major switch and router brands to guarantee plug-and-play interoperability without vendor lock-in.
To guarantee zero-defect deployment, every 100G QSFP28 LR4 optical module is subjected to comprehensive laboratory and field-simulation testing protocols before shipment.
Evaluates the central wavelengths and spectral width to ensure strict compliance with LAN-WDM grid specifications and prevent channel crosstalk.
Verifies the integrity of the optical signal transmission by measuring jitter, noise, and overall waveform quality to ensure IEEE compliance.
Confirms flawless data transmission by running high-stress traffic loads to ensure zero packet loss over extended operational periods.
Validates stable optical and electrical performance across the extreme industrial operating temperature extremes.
We employ a secure, streamlined global supply chain to ensure your high-value optical modules arrive in pristine condition and exactly on schedule.
100G QSFP28 LR4 Modules are individually sealed in ESD-safe bags to prevent any electrostatic discharge damage during handling and transit.
Custom-molded blister packs and reinforced corrugated cartons are utilized to absorb physical impact and vibration.
Automated inventory management enables rapid order fulfillment and same-day dispatch for all in-stock optical transceivers.
Strategic partnerships with top-tier express couriers guarantee fully trackable, expedited shipping to worldwide enterprise destinations.
Installation is a straightforward plug-and-play process; simply insert the 100G QSFP28 LR4 module into a compatible switch port until the latch clicks securely, then connect the duplex LC single-mode fiber patch cord. The module's hot-pluggable architecture allows for seamless network capacity upgrades and hardware maintenance without interrupting the host system's power or traffic flow.
LINK-PP provides professional technical support, including pre-sales consultation, compatibility verification, and post-deployment troubleshooting to ensure smooth network operation.
Professional technical guidance to help customers select the most suitable QSFP-4W20-100G-I modules based on network architecture and application requirements.
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
Compatible | Cisco | Cisco | Cisco | Cisco |
Data Rate (Max) | 100Gbps | 100Gbps | 100Gbps | 100Gbps |
Wavelength | 1310nm | 1310nm | 1310nm | 1310nm |
Connector | Duplex LC | Duplex LC | Duplex LC | Duplex LC |
Cable Distance (Max) | 20km | 2km | 500m | 80km |
Cable Type | SMF | SMF | SMF | SMF |
Operating Temperature | -40°C to +85°C | 0°C to +70°C | 0°C to +70°C | 0°C to +70°C |
Vendor Name | LINK-PP | LINK-PP | LINK-PP | LINK-PP |
Form Factor | QSFP28 | QSFP28 | QSFP28 | QSFP28 |
Max Wavelength | 1310nm | 1310nm | 1310nm | 1310nm |
Transmitter Type | EML | EML | EML | EML |
Receiver Type | PIN | PIN | PIN | SOA+PIN |
DDM/DOM | Supported | Supported | Supported | Supported |
Modulation (Electrical) | 4x 25G-NRZ | |||
Modulation (Optical) | 4x 25G-NRZ | |||
Protocols | QSFP28 MSA,IEEE 802.3-2018,4WDM-20,SFF-8661,SFF-8636 | 100G Lambda MSA 100G-FR Specification compliant | QSFP28 MSA, SFF-8636, IEEE 802.3cu, CAUI-4 | QSFP28 MSA, SFF-8636, IEEE 802.3bm, CAUI-4 |
Warranty | 5 Years | 5 Years | 5 Years | 5 Years |
| Pictures | ID# | Description | Price | Stock | Add to Cart |
Q: Will this 10G SFP+ 1550nm 120km module work with Cisco, Juniper, Dell, MikroTik, and Aruba switches? By S***g on 2026-04-23
A: Yes. The module supports broad OEM compatibility and can be programmed for Cisco, Juniper, Dell, MikroTik, Aruba, Ubiquiti, Netgear, and many other mainstream networking platforms. By admin on 2026-04-23
Q: Do you provide bulk pricing for telecom operators or enterprise network projects? By S***n on 2025-05-07
A: Absolutely. We offer volume discounts, project-based quotations, and long-term supply programs for telecom carriers, ISPs, system integrators, data centers, and enterprise customers. By admin on 2025-05-07
Q: What applications is this 120km optical transceiver best suited for? By L***k on 2025-04-05
A: Operating at 1550nm over single-mode fiber (SMF) with a Duplex LC interface and DDM/DOM diagnostics, this module is ideal for long-haul enterprise WANs, telecom backbone networks, metro Ethernet, utility communications, surveillance backhaul, and other high-reliability 10G fiber deployments. By admin on 2025-04-05
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