Esse cabo deve ser usado para DTE para DCE (ligar um computador e modem) conex§es sem hardware handshaking.

9 PIN D-SUB FEMALE (Para o computador).
25 PIN D-SUB Macho (Para Modem).

9 PIN D-SUB FEMALE to the Computer
25 PIN D-SUB Macho para Modem

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