Understanding the Difference Between CFP, CFP2, CFP4, and CFP8 Optical Transceivers

As global networks continue to demand higher bandwidth and faster speeds, optical transceiver technology has evolved rapidly. From CFP to CFP8, each generation represents a major step forward in data rate, power efficiency, and port density.

In this article, we’ll explain the key differences between CFP, CFP2, CFP4, and CFP8, and how they fit into modern optical network design.

🔹 CFP — The First Generation

The CFP (C Form-Factor Pluggable) module was the first in the series, supporting both 40G and 100G Ethernet.

• Reach: 10 km and 40 km (40GBASE-LR4 / ER4, 100GBASE-LR4 / ER4)

• Connector: LC Duplex

• Power: ~24W

• Application: Early backbone and metro optical networks

Although relatively large, CFP modules were critical in the transition from 10G to 40G/100G networks.

🔹 CFP2 — Improved Density and Efficiency

The CFP2 form factor is about half the size of CFP while maintaining 100G performance.

• Reach: 10 km / 40 km

• Power: ~12W

• Connector: LC Duplex

• Advantage: Higher port density, lower power consumption

• Use Case: Metro and long-haul 100G deployments

CFP2 quickly became the mainstream standard for high-capacity optical networks.

🔹 CFP4 — Compact for Data Centers

The CFP4 module is even smaller—only one-quarter the size of the original CFP.

• Data Rate: 100G

• Connector: MPO-12

• Reach: up to 10 km

• Power: ~6W

• Application: High-density data center links

CFP4 is ideal for data center interconnect (DCI) and environments that require maximum port density with minimal power draw.

🔹 CFP8 — The 400G Powerhouse

As network demands grow, CFP8 brings the next leap forward—supporting 400G transmission.

• Data Rate: 400G

• Reach: 100 m to 10 km (SR8 / FR8 / LR8)

• Connector: 2×CS or MPO-16

• Power: ~20–24W

• Application: Core networks, large-scale data centers, and 5G backbone infrastructure

CFP8 uses PAM4 modulation (8×50G lanes) to deliver ultra-high-speed performance for next-generation optical networks.

⚡ Comparison Overview

🌐 Sate Optics — Professional CFP Series Supplier

At Sate Optics, we provide a full range of CFP, CFP2, CFP4, and CFP8 optical transceivers, covering 10 km, 40 km, and 400G solutions.
Our modules are fully compliant with IEEE and MSA standards, ensuring high reliability, low power consumption, and seamless compatibility with major network equipment vendors.

Whether you’re upgrading a backbone, expanding metro capacity, or building a 400G-ready data center — Sate Optics delivers the right transceiver for your network evolution.