200G QSFP56

200G QSFP56 transceivers use 4 lanes of 50G PAM4 modulation to deliver 200 Gbps in the standard QSFP form factor — fitting existing QSFP cages and breakout patterns. They serve as the natural mid-step between 100G QSFP28 and 400G QSFP-DD for fabrics that want to double bandwidth without changing port density. Optiunik produces QSFP56 modules in SR4 (100 m / OM4 via MPO-12), FR4 (2 km / SMF via duplex LC, CWDM4 wavelength plan), and LR4 (10 km / SMF) variants. Each module ships DDM-enabled, programmed for Cisco / Arista / Nvidia / Juniper / Mellanox coding as requested, with a full Tx-Rx-BER test report. Max power dissipation < 5.5 W per module.