Fiber Optic Cassette Fibre optic cassettes provide a compact solution for seamless wiring and splicing. Equally important, the design allows the box to extend forward from the chassis. This feature allows easy access to adapters and connectors.Cassettes are available in a variety of fiber types, connector types, and fiber counts. Applications Telecom cabinets Data centers Customer premises Local area networks Wide area networks Remote terminals Distributed antenna systems (DAS)