The 40G QSFP+ transceiver is well suited for infiniband and 40GBASE-SR4 / 40GBASE-LR4 applications.
40G-100G-400G Transceivers
Quad Small Form-factor Pluggable (QSFP)40G-100G-400G Transceivers is a compact, hot-pluggable transceiver used for data communications applications. supported by many network component vendors, data rates from 40 Gbit/s or 100 Gbit/s.