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What are the key features and specifications of 400gbase fr4 transceivers?
Knowledge Base + 2024.01.05

The 400GBASE-FR4 (400 Gigabit Ethernet Four-Wavelength Short-Range) transceivers are designed for high-speed data transmission in data center and networking environments. Here are the key features and specifications of 400GBASE-FR4 transceivers:

1. Data Rate:

  • 400 Gbps: 400GBASE-FR4 transceivers support a data rate of 400 gigabits per second.

2. Wavelengths:

  • Four Wavelengths: The "FR4" designation indicates that the transceiver uses four different wavelengths for communication.

3. Fiber Type:

  • Single-Mode Fiber (SMF): 400GBASE-FR4 transceivers typically operate over single-mode fiber, which is designed for longer-distance transmissions.

4. Distance:

  • Reach: The transceivers are designed for short-range applications, typically reaching distances of up to 2 kilometers.

5. Modulation:

  • PAM4 Modulation: 400GBASE-FR4 transceivers often use PAM4 (Pulse Amplitude Modulation with 4 levels) modulation to achieve the higher data rate. PAM4 is a modulation scheme that encodes multiple bits in each symbol.

6. Form Factor:

  • QSFP-DD (Quad Small Form-Factor Pluggable Double Density): 400GBASE-FR4 transceivers commonly use the QSFP-DD form factor, which is an extension of the QSFP form factor designed to support higher data rates.

7. Connector:

  • MPO/MTP Connector: The transceivers typically use MPO/MTP connectors, which are multi-fiber connectors commonly used in high-speed optical communication.

8. FEC (Forward Error Correction):

  • FEC Support: Forward Error Correction is often incorporated in 400GBASE-FR4 transceivers to enhance the reliability of data transmission by detecting and correcting errors.

9. Operating Temperature:

  • Standard Operating Temperature Range: The transceivers are designed to operate within a specific temperature range to ensure optimal performance.

10. Compliance and Standards:

  • IEEE Standards: 400GBASE-FR4 transceivers adhere to the relevant IEEE (Institute of Electrical and Electronics Engineers) standards for 400 GbE.

11. Hot-Pluggable:

  • Hot-Pluggable and Hot-Swappable: Like other transceivers, 400GBASE-FR4 transceivers are hot-pluggable and hot-swappable, allowing for easy installation and replacement without disrupting the entire network.

12. Application:

  • Data Center and High-Speed Networking: 400GBASE-FR4 transceivers are suitable for high-speed data center applications and other networking scenarios where 400 Gbps connectivity is required.

These specifications highlight the key characteristics of 400GBASE-FR4 transceivers, making them a valuable component in high-performance networking environments that demand ultra-fast data rates and short-range connectivity.

Additional Learning Hub Resources  

What kind of fiber is used by the QSFP DD 400G LR4 optical transceiver

What is the QSFP DD format

How does the QSFP DD 400G LR4 optical transceiver accomplish a data rate of 400Gbps

How far can the QSFP DD 400G LR4 optical transceiver reach