A 100Gbps QSFP28 Bi-Directional (BiDi) Transceiver is a high-speed optical module used for transmitting and receiving data at 100 Gigabits per second (Gbps) over a single pair of multimode fibers (MMF), anstelle der traditionellen 8 Fasern, die für das 100G-Ethernet mit Paralleloptik erforderlich sind.