Compaq 247320-003 - Deskpro 4000 - 5166 Model 2500/CDS Reference Manual page 215

Connector and Icon
1 2 3 4
Connector and Icon
1 2 3 4 5
6 7 8 9
Pin Signal
1 VCC (5V)
2 (-) Data
3 (+) Data
4 Ground
Pin Signal
1 Carrier Detect
2 Receive Data
3 Transmit Data
4 Data Term Ready
5 Ground
6 Data Set Ready
7 Request to Send
8 Clear to Send
9 Ring Indicator