400G QSFP-DD ER4 Optical Transceiver for Long-Distance 400G Network Connectivity

Meeting the Growing Demand for High-Speed Data Transmission

As data centers, telecom operators, cloud service providers, and enterprise networks continue to expand, the demand for higher bandwidth and longer transmission distances is increasing rapidly.

The 400G QSFP-DD ER4 optical transceiver has become a key solution for supporting high-capacity network infrastructure, offering reliable 400GbE connectivity over distances of up to 40km on single-mode fiber (SMF).

At SATE Optics, we provide high-performance 400G optical transceivers designed to deliver exceptional interoperability, stability, and cost efficiency for modern networking environments.

What is a 400G QSFP-DD ER4 Transceiver?

The 400G QSFP-DD ER4 is a high-speed optical module designed for 400 Gigabit Ethernet applications.

It adopts the QSFP-DD (Quad Small Form-factor Pluggable Double Density) form factor and utilizes four wavelength channels around 1310nm to transmit and receive data over duplex LC single-mode fiber.

Key Specifications

• Form Factor: QSFP-DD

• Data Rate: 400Gbps

• Transmission Distance: Up to 40km

• Fiber Type: Single-Mode Fiber (SMF)

• Connector: Duplex LC

• Wavelength: 1310nm

• Standard Compliance: IEEE 802.3bs

• Digital Diagnostic Monitoring (DDM) Support

• Hot-Pluggable Design

Key Benefits of 400G QSFP-DD ER4

1. Long-Reach Connectivity

With transmission distances reaching up to 40 kilometers, QSFP-DD ER4 modules are ideal for:

• Data Center Interconnect (DCI)

• Metropolitan Area Networks (MAN)

• Telecom Backbone Networks

• Cloud Infrastructure Connectivity

• Enterprise Campus Networks

This allows organizations to extend network capacity between geographically separated facilities while maintaining high-speed performance.

2. High Bandwidth for Data-Intensive Applications

As applications such as AI workloads, cloud computing, big data analytics, and video streaming continue to grow, network infrastructure must support significantly higher traffic volumes.

The 400G QSFP-DD ER4 enables network operators to scale bandwidth efficiently while reducing the number of required links.

3. Reduced Infrastructure Costs

Compared with deploying multiple lower-speed links, 400G connectivity simplifies network architecture and improves operational efficiency.

Benefits include:

• Lower cabling complexity

• Reduced switch port consumption

• Improved power efficiency

• Simplified network management

4. Excellent Vendor Compatibility

SATE Optics' 400G QSFP-DD ER4 transceivers are tested for compatibility with leading networking platforms, including:

• Cisco

• Juniper

• Arista

• Nokia

• Huawei

• H3C

• ZTE

• Extreme Networks

This enables seamless integration into existing network environments.

Typical Applications

Data Center Interconnect (DCI)

Organizations operating multiple data centers require high-capacity links to support storage replication, disaster recovery, and cloud services.

The 400G QSFP-DD ER4 provides a cost-effective solution for long-distance interconnection.

Telecom and Service Provider Networks

Telecommunications operators increasingly rely on 400G technologies to accommodate growing subscriber traffic and next-generation services.

The ER4 module offers the reach and reliability necessary for metro and regional deployments.

Cloud and Hyperscale Networks

Cloud providers require scalable optical infrastructure capable of supporting ever-increasing traffic demands.

QSFP-DD ER4 modules help deliver the bandwidth needed for modern cloud architectures.

Why Choose SATE Optics?

With over 20 years of experience in networking and optical communication products, SATE Optics helps customers worldwide deploy reliable and cost-effective optical solutions.

Our Advantages

✓ Strict Quality Control and Testing

✓ Full Compatibility Verification

✓ Competitive Pricing

✓ Fast Global Delivery

✓ Technical Support from Networking Experts

✓ OEM and Customized Solutions Available

Whether you are upgrading an existing infrastructure or building a new 400G network, SATE Optics can provide the right optical transceiver solution for your project requirements.

Conclusion

The 400G QSFP-DD ER4 optical transceiver is an ideal choice for organizations seeking high-bandwidth, long-distance connectivity across data centers, telecom networks, and enterprise environments.

By combining 400Gbps performance with transmission distances of up to 40km, the QSFP-DD ER4 helps network operators meet today's demands while preparing for future growth.

For product inquiries, compatibility information, or sample requests, contact SATE Optics today.

400G QSFP-DD ER4 Optical Transceiver | 400G 40km SMF Module Supplier

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