Asus M2V-TVM - Manual (Page 35)

ASUS M2V-TVM 1-25
5. Serial port connector (10-1 pin COM2)
This connector is for serial (COM) port. Connect the serial port module
cable to this connector, then install the module to a slot opening at
the back of the system chassis.
The serial port bracket (COM) is purchased separately.
M2V-TVM
COM2
PIN1
M2V-TVM COM port connector
6. Optical drive audio in connectors (4-pin CD/AUX)
These connectors allow you to receive stereo audio input from sound
sources such as a CD-ROM, TV tuner, or MPEG card.
M2V-TVM
CD
Right Audio Channel
GND
GND
Left Audio Channel
AUX
Right Audio Channel
GND
GND
Left Audio Channel
M2V-TVM Internal audio connectors