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Serial (RS232) modem cable (2-wire, DB25-DB25)

This cable should be used for DTE to DCE (for instance, from computer to a modem) connections without hardware handshaking.

D25 pin D-SUB female to the PCDB25 pin D-SUB female to the PC
DB25 pin D-SUB male to the modemDB25 pin D-SUB male to the modem

FemaleMaleDirection
Shield Ground11
Transmit Data22
Receive Data33
System Ground77
Jumper these:
Request to Send4
Clear to Send5
Data Set Ready6
Carrier Detect8
Data Terminal Ready20
Request to Send4
Clear to Send5
Data Set Ready6
Carrier Detect8
Data Terminal Ready20

RS232 modem cable (2-wire, DB9-DB25)
Modem cable (2-wire, DB25-DB25)
Full mode modem cable (DB9-DB25)
Complete modem cable (DB25-DB25)