Dell YT583 manual Link integrity light

6	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
		Yellow — A good connection exists between a 1000-Mbps (or
		1-Gbps) network and the computer
		Off — The computer is not detecting a physical connection to
		the network
7	network adapter	To attach your computer to a network or broadband device,
	connector	connect one end of a network cable to either a network jack or
		your network or broadband device. Connect the other end of
		the network cable to the network adapter connector on your
		computer. A click indicates that the network cable has been
		securely attached.
		Do not plug a telephone cable into the network connector.
		On computers with an additional network connector card, use
		the connectors on the card and on the back of the computer
		when setting up multiple network connections (such as a
		separate intra- and extranet).
		It is recommended that you use Category 5 wiring and
		connectors for your network. If you must use Category 3
		wiring, force the network speed to 10 Mbps to ensure reliable
		operation.
8	network activity	Flashes a yellow light when the computer is transmitting or
	light	receiving network data. A high volume of network traffic may
		make this light appear to be in a steady "on" state.
9	serial connectors	Connect a serial device, such as a handheld device, to the
	(2)	serial port. If necessary, the address for this port can be
		modified through system setup (see "System Setup" on
		page 75).
10	keyboard	If you have a standard PS/2 keyboard, plug it into the purple
	connector	keyboard connector. If you have a USB keyboard, plug it into a
		USB connector.
11	USB 2.0	It is recommended that you use the front USB connectors for
	connectors (5)	devices that you connect occasionally, such as flash memory
		keys, cameras, or bootable USB devices.

Use the back USB connectors for devices that typically remain connected, such as printers and keyboards.

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