Cisco QSFP-40/100-SRBD= QSFP 40/100G BiDi transceiver

The QSFP28 4/1G dual-rate BiDi (Bi-Directional) transceiver is a pluggable optical transceiver with a duplex LC connector interface for short-reach data communication and interconnect applications using MMF. It offers customers a solution that enables reuse of their existing 1 Gb duplex MMF infrastructure for migration to either 4 or 1 Gigabit Ethernet connectivity.
In 4G mode, the Cisco QSFP 4/1G BiDi transceiver supports link lengths of 1m and 15m on OM3 and OM4 MMF, respectively. In 1G mode, it supports 7 and 1 meters on OM3 and OM4, respectively. Each 4/1G BiDi transceiver consists of two transmit and receive channels in the 832-918 nm wavelength range, enabling an aggregated 4G or 1G link over a two-strand multimode fiber connection.
In 1G mode, the operating temperature range is +1 to +6°C and in 4G mode it is +1 to +7°C. the QSFP28 4/1G BiDi module is primarily used in data center and enterprise applications.