Dell Latitude D820 Technical Manual page 11

3 powered USB connector
4 modem connector (RJ-11)
network connector (RJ-45)
NOTICE: The network connector is slightly larger than the modem connector. To avoid damaging
the computer, do not plug a telephone line into the network connector.
Connects the computer to a network. The two lights next to the connector indicate
status and activity for wired network connections.
For information on using the network adapter, see the device user's guide supplied
with your computer (see
Modem).
USB connector
Connect USB devices, such as a mouse, keyboard, or printer. You can also
connect the optional floppy drive directly to a USB connector using the optional
floppy drive cable.
powered USB 2.0 connector
Connects USB 2.0 compliant devices, such as a mouse, keyboard, or printer. Can
also be used for peripherals that require more than 5 V of power.
modem connector (RJ-11)
If you ordered the optional internal modem, connect the telephone line to the
modem connector.
For information on using the modem, see the online modem documentation
supplied with your computer (see
serial connector
Connects serial devices, such as a mouse or handheld device.
video connector
Connects video devices, such as a monitor.
AC adapter connector — Connects an AC adapter to the computer.
7 AC adapter connector
8 air vents
Physically Connecting to a Network or Broadband
Finding Information).