Dell OptiPlex 740 - Manual (Page 206)

Inside Your Computer
1 parallel
connector
Connect a parallel device, such as a printer, to the parallel connector. If
you have a USB printer, plug it into a USB connector.
NOTE: The integrated parallel connector is automatically disabled if the
computer detects an installed card containing a parallel connector
configured to the same address. For more information, see
System Setup
Options .
2 link integrity
light
l Green — A good connection exists between a 10-Mbps network and
the computer.
l Orange — A good connection exists between a 100-Mbps network
and the computer.
l Yellow — A good connection exists between a 1-Gbps (or 1000-
Mbps) network and the computer.
l Off — The computer is not detecting a physical connection to the
network.
3 network
adapter
connector
To attach your computer to a network or broadband device, 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 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 network speed to
10 Mbps to ensure reliable operation.
4 network
activity light
Flashes a yellow light when the 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.
5 line-out
connector
Use the green line-out connector to attach headphones and most
speakers with integrated amplifiers.
On computers with a sound card, use the connector on the card.
6 line-in
connector
Use the line-in connector to attach a record/playback device such as a
cassette player, CD player, or VCR.
On computers with a sound card, use the connector on the card.
7 USB 2.0
connectors
(5)
Use the back USB connectors for devices that typically remain connected,
such as printers and keyboards.
8 video
connector
Plug the cable from your VGA-compatible monitor into the blue connector.
NOTE: If you purchased an optional graphics card, this connector will be
covered by a cap. Do not remove the cap. Connect your monitor to the
connector on the graphics card.
NOTE: If you are using a graphics card that supports dual monitors, use
the y-cable that came with your computer.
9 serial
connector
Connect a serial device, such as a handheld device, to the serial port. The
default designations are COM1 for serial connector 1 and COM2 for serial
connector 2.
For more information, see System Setup Options .