High capacity and high density, 576 cores are arranged fully on 2.6m frame. Full modular design, independent 72-core fusion unit and independent 72-core wiring unit with flexible arrangement and it can be installed on any style 19" standard frame (cabinet). Use special structure adapter installation board, snap-on adapter installation is easily and quickly operated. It can install various adapters such as FC and SC. It can meet the requirement of both optical fiber ribbon cable and non-ribbon cable. There is clear marking of junction and distributing for each optical cable. Each fusion board can draw out independently.