200G QSFP56 FR4 2km Optical Transceiver CWDM PAM4 Duplex LC SMF Module

The 200G QSFP56 FR4 Optical Transceiver Module is a high-speed optical solution designed for next-generation 200Gbps Ethernet networks, providing reliable connectivity over up to 2km of single-mode fiber. Based on the 200GBASE-FR4 architecture, the module uses four CWDM optical lanes with PAM4 modulation technology to achieve high-bandwidth transmission through a standard Duplex LC/UPC interface. It integrates advanced optical components and integrated CDR functionality to maintain signal integrity and support stable operation in high-density networking environments.

Designed with a compact QSFP56 hot-pluggable form factor, this transceiver delivers an efficient balance between performance, power consumption, and port density. Supporting Digital Diagnostic Monitoring (DDM), CMIS Rev 4.0 management, and a maximum power consumption of 6.5W, it is optimized for cloud data centers, enterprise networks, and high-speed switch and router interconnections. The module complies with IEEE 802.3cd, IEEE 802.3bs Annex 120E, and other industry standards, making it a reliable choice for scalable 200G Ethernet infrastructure.

200G QSFP56 FR4 Optical Transceiver Module Spec

• Supports 200Gbps Ethernet transmission over single-mode fiber
• Compliant with 200GBASE-FR4 Ethernet architecture
• Uses four CWDM optical wavelengths for parallel 200G transmission
• Supports PAM4 modulation for high-bandwidth optical communication
• Transmission distance up to 2km over standard SMF
• QSFP56 compact hot-pluggable form factor for high-density deployments
• Duplex LC/UPC optical interface for easy fiber connectivity
• Integrated TX/RX CDR with bypass capability for signal optimization
• Supports Digital Diagnostic Monitoring (DDM) through management interface
• Low power consumption with maximum power dissipation of ≤6.5W

• 200GBASE-FR4 Ethernet networks
• Cloud data center interconnects
• High-performance data center switching
• Switch-to-switch optical connections
• Router interconnections
• Enterprise backbone networks
• Next-generation Ethernet infrastructure
• AI and high-performance computing network environments

FiberMania provides OEM and customized 200G QSFP56 optical transceiver solutions for data center operators, equipment manufacturers, and system integrators. Customization options include firmware configuration, EEPROM programming, switch compatibility optimization, product labeling, packaging customization, and application-specific testing.

For large-scale deployments, we can provide tailored solutions according to customer requirements, including optical parameter verification, thermal optimization, operating temperature selection, and compatibility testing with different networking platforms to ensure stable integration.

What is the difference between QSFP56 FR4 and QSFP56 SR4 optical modules?

QSFP56 FR4 and SR4 modules are both designed for 200G Ethernet applications, but they use different optical technologies and transmission distances. FR4 uses CWDM wavelengths and single-mode fiber to support longer links up to 2km, while SR4 typically uses 850nm VCSEL technology and multimode fiber for shorter data center connections.

What type of fiber is required for the 200G QSFP56 FR4 module?

This transceiver is designed for single-mode fiber (SMF), typically using duplex LC/UPC fiber cabling. Single-mode fiber provides the low-loss transmission characteristics required for reliable 200G links over distances up to 2km.

Why does the module use PAM4 modulation technology?

PAM4 modulation enables higher data throughput by transmitting multiple bits per symbol, allowing 200Gbps transmission using fewer physical optical lanes compared with traditional NRZ-based solutions. This helps improve port density and network scalability.

Does this 200G QSFP56 FR4 transceiver support DDM?

Yes. The module supports Digital Diagnostic Monitoring (DDM), allowing compatible network equipment to monitor key operating parameters such as temperature, voltage, and optical power.

Can this module be used in existing QSFP56 ports?

Yes. The QSFP56 form factor is designed for integration into compatible 200G Ethernet switches, routers, and networking equipment that support QSFP56 optical interfaces. Compatibility should be verified with the specific host device before deployment.