This cable should be used for DTE to DCE (for instance computer to modem) connections without hardware handshaking. (To Computer).
(To Modem).
9 PIN D-SUB FEMALE to the Computer 25 PIN D-SUB MALE to the Modem | Female | Male | Dir | Shield Ground | | 1 | | Transmit Data | 3 | 2 | OUT | Receive Data | 2 | 3 | IN | System Ground | 5 | 7 | | | | | | Jumper these: | | | | Request to Send | 7 | | OUT | Clear to Send | 8 | | IN | | | | | Data Set Ready | 6 | | IN | Carrier Detect | 1 | | IN | Data Terminal Ready | 4 | | 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 |
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