Cisco QDD-400G-SR8-S Compatible 400GBASE-SR8 QSFP-DD PAM4 Optical Transceiver Module (MMF, 850nm, 100m, MTP/MPO, DOM).

Cisco QDD-400G-DR4-S Compatible 400GBASE-DR4 QSFP-DD PAM4 Transceiver Module (SMF, 1310nm, 500m, MTP/MPO, DOM).

Cisco QDD-XDR4-400G Compatible 400GBASE-XDR4 QSFP-DD PAM4 Optical Transceiver Module (SMF, 1310nm, 2km, MTP/MPO, DOM).

Cisco QDD-400G-FR4-S Compatible 400GBASE-FR4 QSFP-DD PAM4 Optical Transceiver Module (SMF, 1310nm, 2km, LC, DOM).

Cisco QDD-400G-LR8-S Compatible 400GBASE-LR8 QSFP-DD PAM4 Optical Transceiver Module (SMF, 1310nm, 10km, LC, DOM).

Cisco QDD-ER8-400G Compatible 400GBASE-ER8 QSFP-DD PAM4 Optical Transceiver Module (SMF, 1310nm, 40km, LC, DOM).