400G QSFP56-DD have four optical lanes that operate at 100Gbps PAM4 modulation, providing solutions up to 400 Gbps.
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.