Dell Precision M4300 (Mid 2007) - Manual (Page 23)

About Your Computer
21
POWERED U S B 2 . 0 CONNECTOR
MODEM CONNECTOR ( R J - 1 1 )
SERIAL CONNECTOR
VIDEO CONNECTOR
A C ADAPTER CONNECTOR — Connects an AC adapter to the computer.
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.
Connects the telephone line to the modem connector (if
you ordered the optional internal modem).
For information on using the modem, see the online modem
documentation supplied with your computer (see "Finding
Information" on page 9).
Connects serial devices, such as a mouse or handheld device.
Connects video devices, such as a monitor.