This document provides instructions for installing a Huawei MA5608T GPON device in an indoor cabinet. It describes preparing the environment, tools, and cabinet. The MA5608T chassis is installed in a 21-inch cabinet, leaving space above and below for ventilation. Cables like the ground cable, power cable, subscriber cables, trunk cables, and optical fibers are then routed through the cabinet. The installation is checked before powering on the system.