ZyXEL Communications ZYWALL USG 2000 Quick Start Manual page 6

3. The ZyWALL has two power modules. Use the included power cords
to connect the power sockets on the rear panel to power outlets. Use
two different power sources for greater reliability since either power
module is adequate to power the ZyWALL.
4. Push both power switches to the on position and look at the front
panel. The PWR1 and PWR2 lights turn on green. The SYS light
blinks during system testing and initialization and then stays on when
the system is ready.
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