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Hardware Installation
COM (Serial) Ports
COM 1
COM 2
COM 1 and COM 2
DCD-
TD
RD
D
TR
-
GND
1
2
3
4 5
R
T
S-
RI
-
DSR
-
CT
S-
6
7 8
9
COM 3
COM 4
The serial ports are RS232 asynchronous communication ports with 16C550A-
compatible UARTs that can be used with modems, serial printers, remote display
terminals, and other serial devices.
COM 3 and COM 4
1
9
2
DCD-
TD
RD
D
TR
-
GND
R
T
S-
DSR
-
CT
S-
RI
-