RS232 Serial Modem Cable (DB9-DB25)
This cable should be used for DTE to DCE (for instance computer to modem) connections with hardware handshaking.
![]() | DB9 pin D-SUB female to the PC |
![]() | DB25 pin D-SUB male to the modem |
Female | Male | Direction | |
---|---|---|---|
Shield | 1 | ||
Transmit Data | 3 | 2 | → |
Receive Data | 2 | 3 | ← |
Request to Send | 7 | 4 | → |
Clear to Send | 8 | 5 | ← |
Data Set Ready | 6 | 6 | ← |
System Ground | 5 | 7 | |
Carrier Detect | 1 | 8 | ← |
Data Terminal Ready | 4 | 20 | → |
Ring Indicator | 9 | 22 | ← |