Dell OptiPlex 755 - Manual (Page 21)

Quick Reference Guide
21
2 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 1-Gbps
(or 1000-Mbps) network and the computer.
• 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.
Remote management features require use of the onboard
NIC.
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.
6 line-
in/microphone
connector Use the blue and pink line-in/microphone connector to
attach a record/playback device such as a cassette player, CD
player, or VCR.; or a personal computer microphone for
voice or musical input into a sound or telephony program.
7 USB 2.0
connectors (6) Use the back USB connectors for devices that typically
remain connected, such as printers and keyboards.