Serial interfaces cables and converters scheme
This adapter will enable you to use a normal serial cable as a nullmodem
Female Male
Shield Ground11Shield Ground
Transmit Data23Receive Data
Receive Data32Transmit Data
Request to Send45Clear to Send
Clear to Send54Request to Send
Data Set Ready620Data Terminal Ready
Data Terminal Ready206Data Set Ready
Ground77Ground
25 pin D-SUB female connector layout
25 pin D-SUB female connector
at the Computer
25 pin D-SUB male connector layout
25 pin D-SUB male connector
at the Serial cable
According to 2 reports in our database (2 positive and 0 negative) this pinout should be correct.

Is this pinout
Nullmodem adapter visual pinout:
Nullmodem adapter diagram
click to enlarge
Source(s) of this and additional information: Hardware Book
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