Eoptolink’s 2x100G transceivers take advantage of this new building practice and offer two 100G interfaces in one QSFP-DD transceiver. The 100G interfaces are fully compatible to CWDM4, 4WDM-10 or LR4 standards.
These transceivers offer a way of either increasing the port density in 100G switches or to connect in 400G switches more effectively to legacy equipment.

More can be read in our joint white paper with Senko.