Q22QSFP-DD 400G ER4 Transceiver

The Q22 QSFP-DD 400G ER4 Transceiver is a high-speed optical transceiver designed for long-distance 400G Ethernet connectivity in data centers, telecom networks, cloud infrastructure, and 5G backhaul applications. Based on PAM4 modulation technology, it supports a transmission distance of up to 40 km over single-mode fiber (SMF), providing a practical solution for high-bandwidth network connections.

Designed in a QSFP-DD MSA-compliant form factor, the transceiver combines high-speed electrical and optical interfaces with integrated digital diagnostics. Its compact design and single +3.3V power supply make it suitable for high-density network equipment where bandwidth, transmission distance, and power efficiency are important considerations.

400G Ethernet Transmission up to 40 km

The Q22 QSFP-DD 400G ER4 Transceiver supports 400GBASE-ER4 Ethernet and is designed for high-speed transmission over single-mode fiber. With a maximum reach of up to 40 km, it can be used for network connections where standard short-reach optical modules cannot provide sufficient transmission distance.

The module uses PAM4 modulation, with a lane bit rate of up to 106.25 Gb/s, enabling high-capacity optical communication while maintaining the compact QSFP-DD form factor.

This makes the transceiver suitable for applications requiring high bandwidth across longer distances, including data center interconnection, telecom infrastructure, and 5G network backhaul.

PAM4 Technology for High-Bandwidth Networks

As network bandwidth requirements continue to increase, traditional NRZ-based transmission solutions can become less efficient for high-speed applications. The Q22 400G ER4 adopts 4-level Pulse Amplitude Modulation (PAM4) to support higher data rates within the available electrical and optical interface bandwidth.

The module provides a 400GAUI-8 electrical interface with 8 lanes, supporting high-speed signal transmission for 400G network equipment. Each optical lane operates at a high data rate, helping the module meet the bandwidth requirements of modern Ethernet infrastructure.

PAM4 technology also allows network equipment manufacturers and operators to achieve higher transmission capacity without requiring a proportional increase in the number of physical channels.

QSFP-DD Form Factor with Duplex LC Interface

The Q22 400G ER4 is built in a QSFP-DD MSA package and uses duplex LC connectors for optical connectivity. The compact form factor is designed for high-density switching and networking equipment, allowing more high-speed ports to be integrated into limited rack space.

The duplex LC interface provides a familiar optical connection method for single-mode fiber infrastructure, simplifying integration into existing network environments.

The combination of a compact QSFP-DD package and long-distance optical transmission makes the module suitable for high-density network deployments where both port density and link distance need to be considered.

Integrated Digital Diagnostic Monitoring

The transceiver includes an I2C management interface with integrated Digital Diagnostic Monitoring (DDM). This allows compatible network equipment to access important operating information from the optical module.

Digital diagnostic functions can help network operators monitor module operating conditions and support maintenance and troubleshooting during network operation.

For large-scale data centers and telecom networks, this type of monitoring capability can be useful for managing high-speed optical links and identifying potential issues before they affect network performance.

Designed for Data Centers and 5G Backhaul

The Q22 QSFP-DD 400G ER4 Transceiver is designed for high-bandwidth applications across multiple network environments.

400G Ethernet:
Supports 400GBASE-ER4 Ethernet connectivity for high-speed network equipment and long-distance optical links.

5G Backhaul:
Provides high-capacity optical connectivity for transporting large amounts of data between 5G access networks and core infrastructure.

Data Centers:
Suitable for high-density switches, routers, and other networking equipment requiring 400G connectivity over single-mode fiber.

Cloud Networks:
Supports high-bandwidth connections in cloud computing and large-scale network infrastructure where reliable optical transmission is essential.

Stable Power and Operating Performance

The module operates from a single +3.3V power supply and has a maximum power consumption of 12W. This provides a straightforward power architecture for compatible networking equipment.

The operating case temperature range is 0°C to +70°C, making the module suitable for standard commercial-temperature data center and telecom environments.

The transceiver also complies with the EU Directive 2015/863/EU, supporting requirements for restricted hazardous substances in applicable electronic products.

Key Features of Q22 QSFP-DD 400G ER4

• Supports 400GBASE-ER4 Ethernet

• Up to 40 km transmission distance over SMF

• PAM4 modulation technology

• Lane bit rate up to 106.25 Gb/s

• 400GAUI-8 electrical interface

• 8-lane high-speed electrical architecture

• QSFP-DD MSA package

• Duplex LC optical connectors

• Integrated I2C digital diagnostic monitoring

• Single +3.3V power supply

• Maximum power consumption of 12W

• Operating case temperature: 0°C to +70°C

• Suitable for 5G backhaul and data center networks

• Complies with EU Directive 2015/863/EU

A Practical 400G Solution for Long-Distance Connectivity

The Q22 QSFP-DD 400G ER4 Transceiver provides network equipment manufacturers, system integrators, telecom operators, and data center operators with a high-bandwidth optical solution for long-distance Ethernet transmission.

By combining 400GBASE-ER4 support, PAM4 technology, up to 40 km transmission over single-mode fiber, QSFP-DD packaging, duplex LC connectivity, and digital diagnostic monitoring, the module addresses the requirements of modern high-speed network infrastructure.

For 400G deployments that require longer optical reach without moving to a larger module form factor, the Q22 QSFP-DD 400G ER4 offers a compact and practical transceiver solution for data centers, cloud networks, telecom infrastructure, and 5G backhaul applications.