The Cisco QSFP BiDi transceiver addresses the challenges of fiber infrastructure by providing the capability to transmit full-duplex 40-Gbps traffic over one duplex MMF cable with LC connectors. In another words, the Cisco QSFP BiDi transceiver allows 40-connectivity to reuse the existing directly connecting 10-Gbps fibers and the existing fiber trunk without the need to add any fibers. The Cisco QSFP BiDi transceiver (QSFP-40G-SR-BD) is a short-reach optical transceiver that delivers 40 Gbps over a duplex OM3 or OM4 MMF. It is MSA compliant.