HPE 845970-B21 QSFP28 to SFP28 Network Adapter

The HPE 845970-B21 is a specialized network adapter designed to bridge different generations of network port technology within enterprise data centers and high-performance computing environments. Its primary function is to allow a single-lane SFP28 or SFP+ module, typically used for 25GbE or 10GbE, to operate within a four-lane QSFP28 port designed for 100GbE. This solves the critical challenge of connecting lower-speed devices and legacy infrastructure to modern, high-speed switch fabrics without requiring a complete overhaul of existing cabling or optics, providing significant port density flexibility. This adapter offers a practical, cost-effective solution for phased network upgrades. By converting a 100GbE QSFP28 port, it enables the use of 25GbE and 10GbE transceivers, maximizing the utility of expensive switch hardware. The adapter ensures seamless signal integrity for the connected optic, presenting a single, uncongested interface to the switch without complex configuration. This capability is essential for environments managing a mix of server and storage connection speeds, allowing for granular and scalable network segmentation. Engineered as a passive, plug-and-play device, the adapter fits directly into a standard QSFP28 slot on a compatible HPE switch or network card. Its compact form factor requires no external power or software. Management and monitoring are handled transparently by the host system’s network operating system, which recognizes the inserted SFP module’s speed and capabilities. This simplifies deployment and reduces potential points of failure, making it a reliable component for mission-critical network pathways.

• Connects SFP28/SFP+ optics to a 100G QSFP28 port.
• Enables 25GbE or 10GbE connectivity on a 100GbE port.
• Hot-pluggable design for seamless, in-service upgrades.
• Passive adapter requires no external power or drivers.
• Preserves signal integrity for reliable data transmission.