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JTOPTICS 00G QSFP-DD to 8x 50G SFP56 PCC (Passive Copper Cable), also known as Direct Attach Copper (DAC) cable or Twinax cable, provides robust connections between 400G Ethernet (2x 200GE) and 50G Ethernet systems. Each cable consists of eight lanes each operating at data rates of up to 50Gb/s (PAM4). The passive copper cables require no additional power to ensure quality connectivity. The cables are compliant with QSFP-DD MSA and SFP56 MSA standard specifications and provide connectivity between system units with a QSFP-DD (QSFP56-DD) port on one side and up to eight different SFP56 ports on the other.Hot Pluggable QSFP-DD and SFP56 MSA Compliant Data rate up to 425Gbps.8x 53Gb/s PAM4 modulation Operating case temperature of 0-70℃ 8x50G PAM4 Retimed 400GAUI-8 Electrical InterfaceCopper link length up to 3m Supports 400G to 8x50G Ethernet InteroperabilitySingle 3.3V supply voltage Bit Error Rate (BER) better than 1E-15 RoHS compliantData rate up to 53.125..