It accepts standard QSFP+ and QSFP28 pluggable transceiver modules — the cage provides the mechanical alignment, the heat sink pulls thermal load off the module, and the integrated EMI shield contains radiated emissions within the chassis. The press-fit termination means the cage pins are compliant enough to be pressed into plated through-holes without solder, which is standard for high-density backplane I/O where rework or field replacement is a consideration.
Through-hole mounting with press-fit pins: no solder wave or reflow step needed, but the board must have the correct plated through-hole diameter for the compliant pin to hold retention force. The light pipe routes the module's link-status LED to the front panel without a separate light guide assembly.