Cisco QSFP-100G-LR4-I Compatible QSFP28 100GBASE-LR4 1310nm 10km DOM Duplex LC/UPC SMF Optical Transceiver Module (Industrial)

Overview

This is an industrial-grade, high-performance optical transceiver module, 100% compatible with the Cisco QSFP-100G-LR4-I. It is meticulously engineered to deliver robust 100 Gigabit Ethernet connectivity in the most demanding environmental conditions. This module provides a powerful and cost-effective solution for deploying high-speed networks in outdoor enclosures, unconditioned remote sites, and industrial settings where commercial-grade equipment would fail.

Adhering to the 100GBASE-LR4 standard, this QSFP28 module utilizes four LAN-WDM laser channels multiplexed together to transmit and receive 100Gbps data over duplex single-mode fiber for distances up to 10km. Its industrial rating guarantees stable, error-free operation across an extended case temperature range of -40°C to 85°C, making it an essential component for industrial Ethernet backbones, metro access, and 5G transport networks.

Key Features

• Fully compatible with systems coded for Cisco QSFP-100G-LR4-I.
• Supports aggregate data rates of 103.1 Gbps.
• Industrial Grade for reliable performance in harsh temperatures (-40°C to 85°C).
• Transmission distance up to 10km over Single-Mode Fiber (SMF).
• 4-channel LAN-WDM DML transmitter and PIN receiver array.
• Standard Duplex LC connector for seamless integration.
• Hot-pluggable QSFP28 MSA-compliant form factor.
• Integrated Digital Optical Monitoring (DOM/DDM) for real-time diagnostics.

Applications

The rugged construction and high-speed capabilities of the QSFP-100G-LR4-I compatible module make it perfect for mission-critical applications. It is frequently deployed in industrial campus backbones connecting factory floors, transportation and traffic control systems, utility substations, and telecommunication provider networks for 5G fronthaul and backhaul links exposed to extreme temperatures. It is also an excellent choice for data center interconnects (DCI) between buildings in harsh climates.

Specifications

Cross-Platform Compatibility

Engineered as a direct alternative to the Cisco QSFP-100G-LR4-I, this module’s strict adherence to QSFP28 MSA standards ensures it will function seamlessly in a wide range of industrial networking equipment from various manufacturers. Below is a list of common equivalent part numbers that this module can replace:

Advantages

The most significant advantage of this industrial QSFP28 module is its unwavering reliability under temperature extremes. While standard optics can suffer performance degradation or complete failure, this transceiver is built with industrial-rated components to guarantee network uptime for critical infrastructure. This robustness provides peace of mind and operational continuity in challenging deployments.

Furthermore, it presents a compelling value proposition, delivering OEM-equivalent performance and reliability at a fraction of the cost. This allows for the expansion of high-speed industrial networks without the prohibitive expense of original manufacturer optics. The built-in DOM functionality is invaluable for remotely managing and troubleshooting modules deployed in physically inaccessible or hazardous locations.

FAQ (Technical & Product Questions)

1. What makes a QSFP28 module Industrial?

An Industrial QSFP28 module is manufactured using specialized components that are certified to operate within a wider temperature range, specifically -40°C to 85°C. This hardened design ensures it can function reliably in non-climate-controlled environments like outdoor cabinets or factory settings.

2. What does the “-I” in QSFP-100G-LR4-I signify?

The “-I” suffix in the part number QSFP-100G-LR4-I is the standard designation for Industrial-rated hardware. It confirms the module is designed and has been tested to meet the performance specifications across the industrial temperature range.

3. What is 100GBASE-LR4 technology?

100GBASE-LR4 is an IEEE standard for 100Gbps transmission over 10km of single-mode fiber. It uses LAN Wavelength Division Multiplexing (LAN-WDM) to transmit four separate 25Gbps streams over four different wavelengths (colors of light) on a single fiber pair.

4. Can I use this industrial module in a standard data center switch?

Yes, absolutely. An industrial-rated module is over-engineered for a standard commercial environment (0°C to 70°C) and will work perfectly. Its enhanced thermal tolerance simply makes it a more robust and reliable option in any setting.

5. Is this module compatible with Cisco’s industrial networking gear?

Yes. This transceiver is specifically programmed to be recognized as a genuine Cisco part, ensuring seamless compatibility with Cisco’s industrial switch and router lines that require the QSFP-100G-LR4-I module.

6. Does 100GBASE-LR4 require Forward Error Correction (FEC)?

Yes, the 100GBASE-LR4 standard relies on the host device (the switch or router) to implement RS-FEC (Reed-Solomon Forward Error Correction) to ensure an error-free link over the 10km distance.

7. What is the difference between QSFP28 and QSFP+?

QSFP+ is designed for 40Gbps speeds (4x10G lanes), while QSFP28 is designed for 100Gbps speeds (4x25G lanes). Although they share the same physical form factor, they are not interchangeable due to the difference in electrical interface and data rate.

8. Why use a Duplex LC connector for 100G?

The 100GBASE-LR4 standard uses internal multiplexing and demultiplexing to combine the four wavelength lanes. This allows the full 100G signal to be sent and received over a standard duplex fiber pair (one fiber for transmit, one for receive), making it compatible with existing SMF cabling infrastructure.