Lenovo ThinkStation 4157 Hardware Installation And Replacement Manual page 12

Connector
USB connector
Ethernet connector
Serial port
Microphone connector
Audio line-in connector
Audio line-out connector (front
speaker connector)
Audio line-out connector
(subwoofer/center speaker
connector)
Audio line-out connector (rear
speaker connector)
Audio line-out connector (side
speaker connector)
Optical SPDIF out connector
Optical SPDIF in connector
eSATA connector
6
ThinkStation Hardware Installation and Replacement Guide
Description
Used to attach a device that requires a Universal Serial Bus (USB) connector,
such as a USB keyboard, a USB mouse, a USB scanner, or a USB printer. If you
have more than 10 USB devices, you can purchase a USB hub, which you can
use to connect additional USB devices.
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 an external modem, a serial printer, or other devices that use a
9-pin serial port.
Used to attach a microphone to your computer when you want to record sound or
if you use speech-recognition software.
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.
Used to send audio signals from the computer to external 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.
When used with 5.1 or 7.1 surround speakers, this connector should be attached
to the center speakers and subwoofer.
When used with 5.1 or 7.1 surround speakers, this connector should be attached
to the rear left and right speakers.
When used with 7.1 surround speakers, this connector should be attached to the
side left and right speakers.
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 (ToshibaLink) optical cable.
Used to receive 5.1 digital audio signals from external equipment (such as a
receiver or other multimedia device) through a TOSLINK optical cable.
Use this external Serial Advanced Technology Attachment (eSATA) connector
to attach an external hard disk drive.