Rule-1:
When mating two MPO patch cords, it shall be an MPO male connector and an MPO female connector.
Rule-2:
For the standard MPO Connectors, changing the polarity, or adding or removing the guiding pins in the field is not allowed.
Rule-3:
MPO Female connector for direct connection to the optical module if it is with MPO receptacle.
Rule-4:
In order to maintain easy port management and mapping, an MPO cassette is recommended with A-polarity and with a male MPO connector.