VIA Technologies P4PA User Manual page 26

Installation
CD-In Connector: CD_IN
This connector is for the CD-ROM audio connector.
Aux Line-In Connector: AUX_IN
This connector is for a DVD add-on card with Line-in connector.
Modem-In Connector: Modem_IN
This connector is for a modem with internal audio connector.
Socket 478
CD_IN
CD_R
CD_GND
CD_L
AUX_IN
AUX_R
GND
AUX_L
Modem_IN
PHONE_IN
GND
MONO_OUT
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