Two-Wire modem (25-25) Cable Pinout - AllPinouts

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serial interface cable This cable should be used for DTE to DCE (for instance computer to modem) connections without hardware handshaking.

25 pin D-SUB female connector layout
25 pin D-SUB female connector to the Computer


25 pin D-SUB male connector diagram
25 pin D-SUB male connector to the Modem


Female Male Dir
Shield Ground 1 1
Transmit Data 2 2 OUT
Receive Data 3 3 IN
System Ground 7 7
Jumper these:
Request to Send 4 OUT
Clear to Send 5 IN
Data Set Ready 6 IN
Carrier Detect 8 IN
Data Terminal Ready 20 OUT
Request to Send 4 OUT
Clear to Send 5 IN
Data Set Ready 6 IN
Carrier Detect 8 IN
Data Terminal Ready 20 OUT

Notes

References



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