Lenovo ThinkCentre M90 3244 User Manual page 17

Connector
Audio line-in connector
Audio line-out connector
DisplayPort connector
Ethernet connector
Microphone connector
Serial port
PS/2 keyboard connector
(optional)
PS/2 mouse connector
(optional)
USB connector
VGA monitor connector
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
device.
Used to attach a high-performance monitor, a direct-drive
monitor, or other devices that use a DisplayPort 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 sound or 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 keyboard that uses a PS/2 keyboard connector.
Used to attach a mouse, a trackball, or other pointing devices
that use a PS/2 mouse connector.
Used to attach a device that requires a USB connector, such as a
USB keyboard, a USB mouse, a USB scanner or a USB printer. If
you have more than eight 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.
Description
Chapter 1. Product overview
9