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Chapter 1
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5, 36,
Signal
DCD
Data Carrier Detect
RX
Receive Data
TX
Transmit Data
DTR
Data Terminal Ready
GND
Signal Ground
DSR
Data Set Ready
RTS
Request to Send
CTS
Clear to Send
RI
Ring Indicator
Motherboard Description
Name
DB9 PIN
1
2
3
4
5
6
7
8
9
5<
DB25 PIN
8
3
2
20
7
6
4
5
22