REVERSIBLE POLARITY MPO FIBER OPTIC CONNECTOR WITH A REMOVABLE KEY

A multi-fiber, fiber optic connector has a housing having a first end for receiving a multi-fiber fiber optic cable and a second end having openings for said fibers from said cable. First and second key slots are provided for accepting a removable key for setting the polarity of the fibers within the connector, with the first and second key slots located on opposing sides of the connector. The connector has guide pins or guide pin receiving holes for guiding the connection with a second connector. The removable key is movable between the first and second key slots, the key slot with the removable key corresponding to a first active slot and the key slot without the removable key corresponding to a non-active slot. When the removable key is in the first key slot, it results in the first key slot being active with the fibers being presented within the connector in a first polarity. When the removable key is moved from the first key slot to the second key slot, activating the second key slot and deactivating the first key slot, the fibers are presented within the connector in a second polarity, reversed from the first polarity.