Shop wholesale SFP56 Duplex 50G PAM4 optical transceivers, including 50GBASE‑SR 850nm 100m multimode, 50GBASE‑LR 1311nm 10km and 50GBASE‑ER 40km single‑mode variants. Duplex LC interface, hot‑pluggable, DDM digital monitoring supported, multi‑brand compatible, fit for high‑density data center uplinks, 5G fronthaul, enterprise backbone and HPC cluster networking.