Vietnam installs high-speed photoelectric connection QSFP28

Vietnam is deploying QSFP28 optical transceivers to enable 100G high-speed Ethernet connections, enhancing data center, enterprise, and telecom network performance.

What is QSFP28?

QSFP28 stands for Quad Small Form-Factor Pluggable 28, a compact, hot-swappable optical transceiver designed for 100 Gigabit Ethernet (100GbE) networks. It aggregates four parallel 25 Gbps electrical lanes, achieving a total throughput of 100 Gbps, with a physical signaling ceiling of 28 Gbaud per lane to allow encoding overhead and error correction . QSFP28 modules are backward-compatible with QSFP+ form factors, enabling higher bandwidth density without redesigning existing network hardware .

Technical Features

• Electrical Interface: Uses CAUI-4 (100 Gigabit Attachment Unit Interface 4-lane) for communication between the host ASIC and the module .
• Optical Variants: Includes SR4 (short-range multimode), LR4 (long-range single-mode), CWDM4, ER4, and ZR4, supporting distances from 70 meters to 10 km or more depending on fiber type .
• Connectors: Typically uses MPO/MTP multifiber connectors for parallel fiber or duplex LC connectors for long-range single-mode applications .
• Power Efficiency: Low power consumption and compact size make QSFP28 ideal for dense data center deployments .
• Hot-Swappable: Can be installed or replaced without shutting down the network, minimizing downtime .

Applications in Vietnam

Deploying QSFP28 modules in Vietnam supports:

• Data Centers: High-bandwidth spine-leaf architectures for cloud services and enterprise computing.
• Telecom Networks: 100G metro and long-haul connections for ISPs and backbone networks.
• High-Performance Computing (HPC): Low-latency, high-throughput interconnects for research and industrial computing.
• Enterprise Core Networks: Aggregation and distribution layers benefit from higher throughput and reduced latency .

Benefits

• Scalability: Supports breakout into four 25G connections for flexible network design .
• Interoperability: Compliant with IEEE 802.3bm, 802.3ba, and QSFP28 MSA standards, ensuring multi-vendor compatibility .
• Long-Distance Transmission: LR4 modules enable up to 10 km over single-mode fiber, suitable for large-scale deployments .
• Real-Time Diagnostics: I2C interface allows monitoring of temperature, voltage, and optical power for network reliability . By adopting QSFP28 technology, Vietnam is enhancing its network capacity, reliability, and future-proofing for 100G and beyond, supporting the growing demand for cloud services, high-speed internet, and enterprise connectivity.