Lenovo 4215, 4220, 4222, 4219, 4221 manual Connector Description

Connector	Description
Audio line-in 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.
Audio line-out connector	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.
DisplayPort connector	Used to attach a high-performance monitor, a direct-drive
	monitor, or other devices that use a DisplayPort connector.
DVI connector	Used to attach a DVI monitor or other devices that use a DVI
	connector.
Ethernet 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.
Microphone connector	Used to attach a microphone to your computer when you want
	to record sound or if you use speech-recognition software.
Serial port	Used to attach an external modem, a serial printer, or other
	devices that use a 9-pin serial port.
PS/2 keyboard connector	Used to attach a keyboard that uses a PS/2 keyboard connector.
(optional)
PS/2 mouse connector	Used to attach a mouse, a trackball, or other pointing devices
(optional)	that use a PS/2 mouse connector.
USB 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.
VGA monitor connector	Used to attach a VGA monitor or other devices that use a VGA
	monitor connector.

Chapter 1. Product overview 9