Communication room DC power supply and AC power supply is specifically how to achieve, it is best to say clearly how the line and equipment are connected.
General AC to AC into the cabinet through the bus into a lot of road load, load switch to the equipment used by the. Some important cabinets come with UPS.
There are many kinds of DC loads, usually with high, low voltage cabinet lighting, and power operation. And protective lines. More important communication cabinets.
380V AC DC equipment after rectifier module tuning into DC, with a side to side load, battery power, normal operation, AC DC output switch, a switch, a battery switch is not open, the switch of the battery is a battery battery for power supply in the AC power loss.
