A cassette module has three (16) fiber MPOs and four (12) fiber MPOs wherein each (16) fiber MPO has (4) fiber receiving areas with four fibers going to each fiber receiving area and each (12) fiber MPO has (3) fiber receiving areas with four fibers going to each fiber receiving area. Fibers are routed from certain areas of the (16) fiber MPOs to those of the (12) fiber MPOs in order to convert a base (12) communication system to a base 16 communication system.
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