Lenovo ThinkCentre 6393 Hardware Installation And Replacement Manual page 15

Connector
Audio line-in connector
Audio line-out connector
DVI monitor connector
Ethernet connector
Microphone connector
Serial port
USB connector
VGA monitor connector
Description
Used to receive audio signals from an external audio device,
such as a stereo system. When you attach an external audio
device, a cable is connected between the audio line-out
connector of the device and the audio line-in connector of the
computer.
Used to send audio signals from the computer to external
devices, such as powered stereo speakers (speakers with
built-in amplifiers), headphones, multimedia keyboards, or the
audio line-in connector on a stereo system or other external
recording devices.
Used to attach a DVI monitor or other devices that use a DVI
monitor connector.
Used to attach an Ethernet cable for a local area network
(LAN).
Note: To operate the computer within FCC Class B limits, use
a Category 5 Ethernet cable.
Used to attach a microphone to your computer when you want
to record voice or other sounds on the hard disk drive if you
use speech-recognition software.
Used to attach an external modem, a serial printer, or other
devices that use a 9-pin serial port.
Used to attach a device that requires a Universal Serial Bus
(USB) connection, such as a USB keyboard, a USB mouse, a
USB scanner, or a USB printer. If you have more than six USB
devices, you can purchase a USB hub, which you can use to
connect additional USB devices.
Used to attach a VGA monitor or other devices that use a VGA
monitor connector.
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Chapter 2. Overview