Operating Modes Of The Power Supplies - Cisco Gigabit Switch Router 12008 Installation And Configuration Manual

Overview of the Cisco 12008
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Operating Modes of the Power Supplies

The AC-input and DC-input power supplies operate in either of two modes:
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Standalone mode—In this configuration, only one power supply is installed in one of
the two available power supply bays. To remove or replace a single power supply, you
must first power down the system.
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Cisco 12008 Gigabit Switch Router Installation and Configuration Guide
DC-Input Power Supply
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