User`s manual
Chapter 2: Installation
2-15
X8DTU/-F
Rev. 2.0
1
2
Serial Ports
Two COM connections (COM1 & 
COM2) are located on the moth-
erboard. COM1 is located next to 
the Video port on the Backplane IO 
panel. COM2 (JCOM2) is located 
next to the BMC Controller to provide 
front accessible serial connection. 
See the table on the right for pin 
defi nitions.
Serial Ports-COM1
Pin Defi nitions
Pin # Defi nition Pin # Defi nition
1 DCD 6 DSR
2 RXD 7 RTS
3 TXD 8 CTS
4 DTR 9 RI
5 Ground 10 N/A
Serial Ports-COM2
Pin Defi nitions
Pin # Defi nition Pin # Defi nition
1 DCD 6 DSR
2 RXD 7 RTS
3 TXD 8 CTS
4 DTR 9 RI
5 Ground 10 Key
1. COM 1
2. COM 2










