How to Choose the Right 100G Module

As enterprise networks and data centers continue to expand, the demand for high-speed, reliable connectivity is growing exponentially. 100G optical transceivers have become the industry standard across a wide range of applications—but with multiple form factors and specifications available, selecting the right module can be challenging.

1. Understand the Common 100G Form Factors

There are several popular form factors for 100G transceivers, each with unique characteristics:

• QSFP28 – the most widely adopted form factor for 100G Ethernet
• CFP – an older, larger module with high power consumption
• OSFP & QSFP-DD – for next-generation 200G/400G networks with backward compatibility

2. Match the Transmission Distance

100G modules are designed for various transmission distances. Choosing the correct one ensures reliable performance:

3. Consider Interface and Compatibility

Ensure your switch or router supports the desired form factor and data rate. Also verify compatibility with your vendor’s ecosystem. While many transceivers are multi-vendor compatible, others may require custom coding for OEMs like Cisco or Juniper.

4. Evaluate Power Consumption and Heat

Different modules generate varying levels of heat. In high-density deployments, prioritize low-power modules or ensure adequate cooling to maintain stability and long-term performance.

5. Balance Budget and Performance

Not all 100G modules are created equal. Consider total cost of ownership—including price, reliability, power usage, and warranty—before choosing. Always prioritize signal integrity and certifications.

Conclusion

Selecting the right 100G optical transceiver requires a careful balance of technical requirements, infrastructure compatibility, and budget goals.

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