100G QSFP28

The 100G QSFP28 (Quad Small Form-factor Pluggable 28) transceiver is the industry-standard solution for high-density 100 Gigabit Ethernet connectivity. It operates using four independent transmit and receive channels, each capable of 25Gbps operation to achieve an aggregate bandwidth of 100Gbps. Unlike earlier 100G form factors like the CFP or CFP2, the QSFP28 features a significantly smaller footprint and lower power consumption, typically under 3.5W. By utilizing NRZ (Non-Return to Zero) modulation, these modules offer a mature and highly reliable method for high-speed data transmission, making them the most widely adopted interconnect for modernizing network infrastructure from 10G and 40G to 100G speeds.

Technically, the 100G QSFP28 is defined by its versatility and high port density on network switches. These modules are built in strict accordance with the SFF-8665 and QSFP28 MSA standards, ensuring universal compatibility and “hot-swappable” convenience across diverse hardware platforms. They support a wide range of optical interfaces, including SR4 for short-reach multimode fiber and LR4, CWDM4, or PSM4 for long-reach single-mode applications. Each module includes integrated Digital Diagnostic Monitoring (DDM), allowing for real-time tracking of critical operating parameters such as optical output power, receiver sensitivity, and temperature, which is essential for maintaining the health of complex fiber links.

100G QSFP28 transceivers are the backbone of contemporary enterprise data centers, carrier networks, and cloud computing infrastructures. They are extensively used in leaf-spine network architectures to provide high-speed uplinks and are essential for supporting bandwidth-intensive applications such as 4K video streaming, high-frequency trading, and large-scale virtualization. Additionally, many QSFP28 ports support breakout configurations, allowing a single 100G port to connect to four 25G ports, providing immense flexibility for network scaling. This combination of high density, low power, and proven reliability makes the QSFP28 the go-to choice for cost-effective 100G networking deployments globally.