MPO cassettes feature one or two MPO connections for 12- or 24-fiber applications. Cassettes have the same footprint as the snap-in adapter plates and come pretested and ready to use. Cassettes' fiber polarity is flipped AB/BA with straight-through con figurations. MPO SECURE cassettes are available in 10 color-coded and keyed connector configurations that limit improper connections in segregated or secure networks. Pretested MPO and MPO SECURE trunk cable assemblies are available in many color/lengt h/fiber count combinations.