Lenovo 4265, 4271, 4272, 4269, 4264, 4266, 4263 manual Connector Description

Connector	Description
Optical SPDIF in	Used to receive 5.1 digital audio signals from an external device
connector	(such as a receiver or a multimedia device) through a TOSLINK
	(ToshibaLink) optical cable.
Optical SPDIF out	Used to send 5.1 digital audio signals from a computer to an
connector	external device (such as an amplifier or a receiver) through a
	TOSLINK optical cable.
Serial port (available on	Used to attach an external modem, a serial printer, or other
some models)	devices that use a 9-pin serial port.
USB connector	Used to attach a device that uses a USB connector, such as a
	USB keyboard, a USB mouse, a USB scanner, or a USB printer.
	If the USB connectors on your computer are not enough for you
	to connect all your USB devices, you can purchase a USB hub,
	which you can use to connect additional USB devices.

Chapter 1. Product overview 9