Lenovo THINKSTATION 4155 - Manual (Page 17)

1 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 to your computer, connect the
cable to the audio line-out connector of the device and
the audio line-in connector of the computer.
2 Audio line-out connector
(front speaker connector)
Used to send audio signals from the computer to
external audio devices, such as powered stereo speakers
(speakers with built-in amplifiers), multimedia
keyboards, or the audio line-in connector on a stereo
system or other external recording devices.
When used with 5.1 or 7.1 surround speakers, this
connector should be attached to the front left and right
speakers.
3 Microphone connector Used to attach a microphone to your computer when
you want to record sound or if you use
speech-recognition software.
4 Headphone connector Used to attach headphones to your computer when you
want to listen to music or other sounds without
disturbing anyone. This connector might be located on
the front of the computer.
5 Audio line-out connector
(subwoofer/center speaker
connector)
When used with 5.1 or 7.1 surround speakers, this
connector should be attached to the center speaker and
subwoofer.
6 Audio line-out connector
(rear speaker connector)
When used with 5.1 or 7.1 surround speakers, this
connector should be attached to the rear left and right
speakers.
7 Audio line-out connector
(side speaker connector)
When used with 7.1 surround speakers, this connector
should be attached to the side left and right speakers.
8 Optical SPDIF (Sony Philips
Digital Interconnect Format) in
connector
Used to receive 5.1 digital audio signals from an
external device, such as a receiver or other multimedia
devices, through a TOSLINK (ToshibaLink) optical cable.
9 Optical SPDIF out connector Used to send 5.1 digital audio signals from a computer
to an external device, such as an amplifier or a receiver,
through a TOSLINK optical cable.
Chapter 3. Setting up your computer 9