From hyperscale cloud platforms to next-generation telecom infrastructure, the demand for high-speed, reliable, and scalable connectivity has never been greater. At the center of this transformation is the 400G QSFP-DD LR4 optical module, a powerful solution built to support the future of networking.

What Sets the 400G QSFP-DD LR4 Apart?

The QSFP-DD LR4 module was designed to meet the growing needs of modern networks without compromising efficiency or flexibility. Built on Quad Small Form-Factor Pluggable Double Density (QSFP-DD) standards, it is optimized for 400Gbps Ethernet and long-distance deployments.

Technical highlights include:

• Data Rate: 400Gbps, enabling faster traffic flows for data-intensive workloads.

• Transmission Distance: Supports up to 10km over standard single-mode fiber (SMF).

• Wavelengths: Four CWDM lanes (1271nm, 1291nm, 1311nm, 1331nm).

• Connector: Duplex LC interface for easy integration.

• Compliance: IEEE 802.3bs 400GBASE-LR4 standard.

• Efficiency: Low power consumption for high-density racks.

These specifications ensure reliable long-haul performance, even in the most demanding environments.

Why Businesses Choose 400G QSFP-DD LR4

1. Scalability for the Future

As applications like AI, VR, and 5G expand, legacy network infrastructure struggles to keep up. The LR4 module delivers the capacity needed to scale seamlessly into the future.

2. Long-Distance Performance

With a reach of 10km, it is well-suited for inter-data center connections, metropolitan area networks, and enterprise backbones.

3. Operational Efficiency

Its hot-pluggable design, compact form factor, and low energy usage make it easy to deploy, maintain, and scale without increasing operational overhead.

4. Seamless Compatibility

Engineered to interoperate with leading equipment vendors, it integrates smoothly into existing systems, making network upgrades hassle-free.

Key Application Scenarios

• Data Center Interconnect (DCI): Provides high-capacity links between campuses or metro locations.

• Telecom Core Networks: Ensures reliable transmission for national and regional operators.

• Cloud Infrastructure: Supports workloads in AI, machine learning, and big data analytics.

• Enterprise Networks: Offers future-ready connectivity for global organizations expanding their digital presence.

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Strategic Benefits

Adopting 400G QSFP-DD LR4 modules provides organizations with:

• Reduced fiber costs through CWDM multiplexing.

• Lower power consumption, saving on long-term operational expenses.

• Improved network resilience with digital diagnostics for proactive monitoring.

• A sustainable solution that meets both current and future data demands.

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FAQ – 400G QSFP-DD LR4

Q1: What is the maximum distance supported?
A1: It supports up to 10km transmission over single-mode fiber.

Q2: How does LR4 differ from SR8 modules?
A2: LR4 is designed for long-distance (up to 10km), while SR8 is for short-reach connections (up to 100m).

Q3: Is it backward-compatible with older systems?
A3: Yes, it is designed for interoperability and smooth upgrades.

Q4: What type of connector is used?
A4: A standard duplex LC optical connector.

Q5: Who should consider upgrading to 400G LR4?
A5: Data centers, telecom providers, cloud platforms, and enterprises needing high-speed, long-distance connectivity.

Conclusion

The 400G QSFP-DD LR4 optical module is more than just a transceiver—it’s a cornerstone for building high-performance, future-ready networks. By offering unmatched speed, long-distance transmission, and energy efficiency, it enables organizations to stay competitive in a rapidly evolving digital world.