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9 to 25 pin serial adapter pinout

This adapter will enable you to connect a 25 pin serial cable to a 9 pin connector at the computer.

Signal 9-Pin 25-Pin
Carrier Detect 1 8
Receive Data 2 3
Transmit Data 3 2
Data Terminal Ready 4 20
System Ground 5 7
Data Set Ready 6 6
Request to Send 7 4
Clear to Send 8 5
Ring Indicator 9 22
Electronic Circuits: 
Circuit Diagram: 
9 to 25 pin serial adapter pinout

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