Jetway Computer NMF91-G41 - Manual (Page 13)

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(13)COPEN (2-pin): Case Open Message Display function select
Case Open Display Function
1-2 Short： Case Open
COPEN
1-2 Open： Normal
Pin 1-2 shorted: Case open display function enabled. In this case if you case is
removed, next time when you restart your computer a message will be displayed
onscreen to inform you of this.
2-2 Connectors and Headers
2-2-1 Rear I/O Back Panel Connectors
(1) PS/2 Mouse & PS/2 Keyboard Connector: KB
The connectors are for PS/2 keyboard (Purple) and PS/2 Mouse (Green).
(2) Serial port connector: COM1
COM1 is a 9-pin serial port connector.
(3) D-Sub 15-pin Connector: VGA1
VGA connector is the 15-pin D-subminiature female connector; it is for the
display devices, such as the CRT monitor, LCD monitor and so on.
(4) USB Port Connectors: USB ports from UL1/ UL2
The connectors are 4-pin connector that connects USB devices to the system
board.
(5) LAN Port connectors: RJ45 LAN ports from UL1/UL2
The connector is standard RJ45 connector for Network. It supports
10/100/1000Mbps data transfer rate.
(7) Audio Line-In, Lin-Out connector: CN2
These Connectors are 3 Phone-Jack for LINE-OUT, LINE-IN, MIC audio
connections.
RJ-45 LAN Ports
PS/2 Mouse Port
PS/2 Keyboard Port
Line-IN
Line-OUT
MIC-IN
USB Ports
Serial Port VGA Port