DB-9 Pin Assignments

Pin

Assignment

 

 

1

CD

 

 

2

RXD

 

 

3

TXD

 

 

4

DTR

 

 

5

GND

 

 

6

DSR

 

 

7

RTS

 

 

8

CTS

 

 

9

RI

 

 

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