What should be paid attention to before communication equipment is powered up?
Before power up, use multimeter to measure whether the switch voltage of the device is stable and normal. (generally speaking, there is a voltage between the equipment and the product).
Before switching on the multimeter is used to measure the power supply voltage is stable and normal open end cabinet.
1. check whether the power line is connected to the correct position of the power cabinet (work and on air).2. Check the protection of the equipment and whether the ground wire is connected properly.
