Hardware Configuration
IB990 User’s Manual
21
2
2.5.2
COM3, COM4 Serial Port (J3)
1
2
19
20
Pin #
Assigment
Pin #
Assigment
1
DCD3
2
DSR3
3
RXD3
4
RTS3
5
TXD3
6
CTS3
7
DTR3
8
RI3
9
Ground
10
NC
11
DCD4
12
DSR4
13
RXD4
14
RTS4
15
TXD4
16
CTS4
17
DTR4
18
RI4
19
Ground
20
NC