Dell E521 specifications Back View of the Computer, Back Panel Connectors

NOTICE: Ensure that there is a minimum of two inches of space between all vents and any object near these vents.

NOTICE: Keep the vent area clean and dust-free to ensure that the computer is adequately ventilated. Use only a dry cloth to clean the vent area to avoid water damage to the computer.

Back View of the Computer

1	voltage selection	See the safety instructions in the Product Information Guide for more
	switch	information.
2	power connector	Insert the power cable.
3	back panel	Plug USB, audio, and other devices into the appropriate connector.
	connectors	See Back Panel Connectors for more information.
4	card slots	Access connectors for any installed PCI and PCI Express cards.

Back Panel Connectors

1	link integrity light	• Green — A good connection exists between a 10-Mbps
		network and the computer.
		• Orange — A good connection exists between a 100-Mbps
		network and the computer.
		• Off — The computer is not detecting a physical connection to
		the network.
2	network adapter	To attach your computer to a network or broadband device, connect
	connector	one end of a network cable to either a network port or your
		network or broadband device. Connect the other end of the
		network cable to the network adapter connector on the back panel
		of your computer. A click indicates that the network cable has been
		securely attached.
		NOTE: Do not plug a telephone cable into the network connector.
		On computers with a network connector card, use the connector on
		the card.
		It is recommended that you use Category 5 wiring and connectors
		for your network. If you must use Category 3 wiring, force the