A cassette includes a housing having a plurality of plug cavities that are separated from adjacent plug cavities by shield elements. The cassette also includes a contact subassembly having a circuit board and a plurality of contacts arranged in contact sets coupled to the circuit board. The contact sets are configured to mate with different plugs. The contact subassembly is loaded into the housing such that the contact sets are received in different plug cavities, wherein the contact sets are separated from adjacent contact sets by the shield elements.