MPO (Multi-fiber Push On) are connector for ribbon cables with four to twenty-four fibers connectors for singlemode fiber have angled ends to minimize back-reflection, while multimode fiber versions typically have flat ends. MPO Cassette makes it easy to switch the connection between a multi-fiber MPO connector and single-fiber connector. This system is designed to suit for a high-density termination environment in telecom central office, data centers etc.