Use this cable between two devices - a computer (DTE) and a printer (DCE)
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  D-Sub 1 D-Sub 2  
Receive Data 2 3 Transmit Data
Transmit Data 3 2 Receive Data
Clear To Send + Data Set Ready 5 + 6 20 Data Terminal Ready
Carrier Detect + Data Terminal Ready 8 + 20    
Ground 7 7 Ground
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25 pin D-SUB female connector layout
25 pin D-SUB female connector
at the computer
Source(s) of this and additional information: Hardware Book
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