QSFP56 vs. QSFP28 Cables: What You Need to Know Before Upgrading

 

High-performance data centers demand equally high-performing interconnect solutions. As network infrastructures evolve, understanding the differences between QSFP56 and QSFP28 cables is crucial for making informed upgrade decisions. These two cable types cater to distinct needs and represent significant advancements in data transmission capabilities.

QSFP28: The Foundation of 100G Networks

QSFP28 (Quad Small Form-Factor Pluggable 28) has become the industry standard for 100G Ethernet. Designed to transmit data rates of up to 28 Gbps per lane, with four lanes combining for 100 Gbps total throughput, QSFP28 is widely used in large-scale cloud data centres, enterprise networks, and high-performance computing environments.

Key features of QSFP28 cables include:

· Versatile Connectivity: Available in DAC (Direct Attach Copper), AOC (Active Optical Cable), and optical transceiver options, QSFP28 supports varying distances and deployment scenarios.

· Energy Efficiency: With a typical power consumption of less than 3.5W per port, QSFP28 is a power-efficient choice for dense network architectures.

· Broad Compatibility: Backward compatibility with QSFP+ ensures seamless integration with existing infrastructure, simplifying upgrades.

For networks operating at 25G, 50G, or 100G, QSFP28 remains a reliable and cost-effective choice, balancing performance and scalability.

QSFP56: Pushing Boundaries at 200G

QSFP56 represents the next step in network speed evolution, doubling the per-lane data rate of QSFP28 to 50 Gbps, allowing a total throughput of 200 Gbps. Ideal for hyperscale data centres and 5G networks, QSFP56 is a critical enabler of next-generation applications demanding ultra-low latency and higher bandwidth.

Advantages of QSFP56 cables include:

· Increased Bandwidth: Supporting 200G Ethernet, QSFP56 meets the growing demands of AI workloads, big data analytics, and high-speed storage systems.

· Enhanced Signal Integrity: Utilising PAM4 (Pulse Amplitude Modulation), QSFP56 achieves higher data rates without significantly increasing power consumption.

· Future-Ready Performance: QSFP56 ensures network readiness for 200G upgrades, making it a strategic investment for long-term growth.


Key Differences Between QSFP28 and QSFP56

Aspect

QSFP28

QSFP56

Max Data Rate

100 Gbps

200 Gbps

Modulation

NRZ (Non-Return to Zero)

PAM4 (Pulse Amplitude Modulation)

Use Cases

100G Ethernet, cloud, and enterprise networks

200G Ethernet, hyperscale, and 5G networks

Compatibility

Backward compatible with QSFP+

Limited to QSFP56 infrastructure

When to Choose QSFP56 Over QSFP28

For networks operating with 100G links and experiencing moderate traffic demands, QSFP28 remains a cost-effective and reliable choice. However, if your organization is preparing for the future—whether that involves scaling to 200G or managing increasing traffic from emerging technologies like IoT and AI—QSFP56 cables are the smarter option. Their higher throughput and improved efficiency make them ideal for future-proofing your network.

Simplify Your Network Upgrade with Fibermart

Choosing the right cables can be daunting, but Fibermart can help. The fiber optic solutions provider offers a wide selection of QSFP28, QSFP56, and other cables tailored to meet your specific networking needs.

Whether you’re upgrading to handle growing workloads or planning for future scalability, the team of experts at Fibermart ensures you have the right solutions at competitive prices.

Upgrade your network with confidence. Explore Fibermart’s extensive product range today!

 

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