Totally enclosed type integrated access system and method of reducing power consumption of the system

A totally enclosed type integrated access system and a method of reducing the power consumption of the system is disclosed. The system includes a die cast cabinet. The cabinet is composed of an upper cover (14) and a lower cover (15). The connection surfaces of the upper cover (14) and the lower cover (15) are sealed. Heat radiation teeth are arranged on the peripheral of the upper cover (14) and the lower cover (15) respectively. Heat-generation components of the system tightly contact with the inner wall of the upper cover (14) and/or the lower cover (15). The heat-generation components includes a customer board (16), a system-controlling board (17) and a power board (18). The method includes: the system-controlling board (17) detects the traffic volume of the customer board (16), when the detected traffic volume is lower than a preset low limit value, the system-controlling board (17) enters a low-frequency working status, when the detected traffic volume increases to a preset high limit value, the system-