Dell KP542 manual Connector

4	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.
		NOTICE: 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.
5	network activity	The network activity light is on (flashing) when the
	light	computer is transmitting or receiving network data. A high
		volume of network traffic may make this light appear to be
		in a steady on state.
6	line-out	Use the green line-out connector to attach headphones and
	connector	most speakers with integrated amplifiers.
		On computers with a sound card, use the connector on the
		card.
7	line-in connector	Use the blue line-in connector to attach a record/playback
		device such as a microphone, cassette player, CD player,
		or VCR.
		On computers with a sound card, use the connector on the
		card.
8	Rear Dual USB	Use the back USB connectors for devices that typically
	2.0 connectors	remain connected, such as printers and keyboards.
	(2)	NOTE: It is recommended that you use the front USB

connectors for devices that you connect occasionally, such as flash memory keys or cameras, or for bootable USB devices.

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Quick Reference Guide