Extend 100 GbE connectivity across installed duplex multimode fiber with a bidirectional optical interface that uses LC connectors rather than a parallel-fiber MPO connection. QSFP-100G-SRBD-ACC is an Arista-compatible 100GBASE-BiDi transceiver for compatible QSFP ports, providing a practical path to 100 GbE where two-fiber multimode patching and structured cabling are already in place. The BiDi optical design carries traffic in both directions across a duplex fiber pair. That distinction matters in data center rows, equipment rooms, and aggregation areas built around LC-terminated multimode fiber: the link can retain the existing two-fiber path rather than requiring four-pair parallel-fiber infrastructure. The module supports 100 Gigabit Ethernet connectivity and is intended for short-reach multimode-fiber links. Select this module when both endpoint ports support the required 100GBASE-BiDi operating mode and the installed fiber path is duplex multimode fiber with LC terminations. Its QSFP form factor fits high-density network equipment that accepts compatible QSFP optical modules. Compared with parallel-optics 100 GbE modules in the same general family, this version is distinguished by its bidirectional operation over two fibers and its duplex LC connector interface.