HP E2620, Руководство по установке и началу работы

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2-19
Installing the Switch
Installation Procedures
network cable is connected to the port, see “Diagnosing with the LEDs” in
chapter 4, “Troubleshooting”.
7. (Optional) Connect an External Power Supply to the
Switch
There are three external power supplies available for these switches:
■ HP 600 Redundant and External Power Supply, J8168A, is an accessory
product for the E2620 switches and specific other HP switches.
■ HP 620 Redundant and External Power Supply, J8696A, is an accessory
product for the E2620 switches and specific other HP switches.
■ HP 630 Redundant and/or External Power Supply, J9443A, is an accessory
product for the E2620-PoE+ switches and specific other HP PoE+
switches.
The external power supplies provide two types of power to the switches:
■ Redundant power, to back up the internal switch power supply in case of
AC power loss, or a fault condition. Should the internal switch power
supply fail, power will be supplied from the external power supply.
■ External Power-over-Ethernet (PoE/PoE+) power. The external power
supplies can supply PoE/PoE+ power to the switch if the internal PoE/
PoE+ power supply fails. For the 48 port switch, the external PoE/PoE+
power is additional power made available to the switch’s ports.
For further information regarding the external power supply PoE/PoE+
capabilities, see the following manuals:
• HP Power over Ethernet (PoE/PoE+) Planning and Implementation
Guide
• HP Redundant and/or External Power Supply Installation and
Getting Started Guide
These manuals are on the HP Web site at
www.hp.com/networking/support
.
These external power supplies are unmanaged power supplies that only
provide information by way of LEDs.