The Rear Panel; Power Supplies - Juniper NETSCREEN-ISG 2000 Mode D'emploi

Chapter 1 Overview
T R P
HE EAR ANEL
The rear panel of the NetScreen-ISG 2000 contains the power supplies.

Power Supplies

The NetScreen-ISG 2000 supports two redundant, fault-tolerant and auto-switching
power supplies. The power supplies are hot-swappable, so you can remove or replace one
power supply without interrupting device operation.
You can order the NetScreen-ISG 2000 with one or two power supplies: DC and AC.
Although the NetScreen-ISG 2000 can run with one power supply, it is advisable to install
two. This practice minimizes the chance of system failure due to an individual power
supply failure.
Important: Do not mix the power supply types because it could seriously damage the
device.
When the NetScreen-ISG 2000 contains two power supplies, they share the power load
equally. If one power supply fails, the other assumes the full load automatically and the
device sends a system alarm. The Power LED only displays two colors: green, indicating
that the power supply is functioning correctly and red, which indicates that the power
supply has failed.
10 User's Guide