Modem 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 with hardware handshaking.

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


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


Modem DSUB9 to DSUB25 cable

Female Male Dir
Shield 1 -
Transmit Data 3 2 OUT
Receive Data 2 3 IN
Request to Send 7 4 OUT
Clear to Send 8 5 IN
Data Set Ready 6 6 IN
System Ground 5 7 -
Carrier Detect 1 8 IN
Data Terminal Ready 4 20 OUT
Ring Indicator 9 22 IN


Modem DSUB25 to DSUB25 cable

Female Male Dir
Shield Ground 1 1 -
Transmit Data 2 2 OUT
Receive Data 3 3 IN
Request to Send 4 4 OUT
Clear to Send 5 5 IN
Data Set Ready 6 6 IN
System Ground 7 7 -
Carrier Detect 8 8 IN
Data Terminal Ready 20 20 OUT
Ring Indicator 22 22 IN

Notes

References



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