Serial interfaces cables and converters scheme
This adapter will enable you to connect a 25 pin serialcable to a 9 pin connector at the computer
Signal9-Pin 25-Pin
Carrier Detect18
Receive Data23
Transmit Data32
Data Terminal Ready420
System Ground57
Data Set Ready66
Request to Send74
Clear to Send85
Ring Indicator922
9 pin D-SUB male connector layout
9 pin D-SUB male connector
at the computer
25 pin D-SUB female connector layout
25 pin D-SUB female connector
at the cable
According to 6 reports in our database (6 positive and 0 negative) this pinout should be correct.

Is this pinout
Serial dsub9 to dsub25 adapter schematic visual pinout:
Serial dsub9 to dsub25 adapter schematic diagram
click to enlarge
Source(s) of this and additional information: Hardware Book
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