Connecting Com2 (For Ax4Sg Max Ii Only) - AOpen AX4SG Max II Manual

Connecting COM2 (for AX4SG Max II only)

This motherboard provides two serial ports. One of them is on back panel
connector, and the other is on the upper left of board between PCI slots. With
proper cable, you can connect it to the back panel of chassis.
Pin 1
DCD#
SOUT
GND
RI#
RTS#
1
SIN
DTR#
DSR#
CTS#
30