200G QSFP56 passive cable assembly can provide new generation performance of QSFP by higher date transfer rate. At the same time,  QSFP56 TO 2 x QSFP28 cable choose dual side drain cable and self-designed PCBA, provide low loss. All the designing is based on the industry standard specifications, such as SFF-8679, SFF-8636 and QSFP56 TO 4SFP56 MSA specifications.