Move 100 GbE traffic across short-reach multimode links with a QSFP28 transceiver built for dense switching environments. This HPE Aruba compatible JL309A equivalent is designed for 100GBASE-SR4 connectivity at 850 nm, making it a strong fit for leaf-spine fabrics, top-of-rack aggregation, and other high-port-count deployments where clean fiber management matters. SR4 optics are a practical choice when you need high throughput without the cost and complexity of longer-reach single-mode designs. The parallel multimode architecture supports short-distance interconnects with the bandwidth headroom expected in modern data center networks. For teams standardizing on Aruba-compatible hardware, this module helps preserve deployment consistency while keeping the optics layer aligned to the switching platform. Use it where short-reach 100 GbE links need to be dependable, compact, and easy to scale. It is suited to environments that value predictable optical performance and straightforward integration into existing multimode infrastructure.