|
DB-9M
|
Function
|
Abbreviation
|
|
Pin
#1
|
Data
Carrier Detect
|
CD
|
|
Pin
#2
|
Receive
Data
|
RD
or RX or RXD
|
|
Pin
#3
|
Transmitted
Data
|
TD
or TX or TXD
|
|
Pin
#4
|
Data
Terminal Ready
|
DTR
|
|
Pin
#5
|
Signal
Ground
|
GND
|
|
Pin
#6
|
Data
Set Ready
|
DSR
|
|
Pin
#7
|
Request
To Send
|
RTS
|
|
Pin
#8
|
Clear
To Send
|
CTS
|
|
Pin
#9
|
Ring
Indicator
|
RI
|
|