This fiber optic cassette is used in high-density network applications for cross connects in main distribution, horizontal distribution, and equipment distribution areas. It meets the demands of Gigabit Ethernet, 10 Gigabit Ethernet, and high-speed fiber channel systems while maintaining compatibility with Ethernet, Fast Ethernet, and ATM. This fiber optic cassette is pre-terminated and designed to mount into compatible telecommunications racks allowing a big number of fiber connections to be deployed in one rack unit without additional support infrastructure. This ensures efficient use of space, quick deployment, and high reliability. This space-saving solution will provide increased access between ports, thus enabling the ease of moves, adds, and changes.