400GBASE-FR4 QSFP-DD SMF 1271-1331nm 2km DDM Transceiver 100% OEM Compatible 400GBase-FR4 QSFP-DD Transceiver (SMF, 1271-1331 nm, 2 km, LC, DDM, Commercial Temp.) Specifications Form Factor: QSFP-DD-FR4 Data Rate: 425 Gb/s Wavelength: 1271 nm, 1291 nm, 1311 nm, 1331 nm Protocols: 400 G Ethernet, MSA,...