HP Xw8400 - Workstation - 4 GB RAM Technical Reference Manual page 160

Serial connector
USB connector
IEEE 1394 connector
Microphone connector (1/8 inch)
Headphone connector (1/8 inch)
150 Appendix D Appendix D — Connector pins
Pin Signal
1 Carrier Detect
2 Receive Data
3 Transmit Data
4 Data Terminal Ready Signal
5 Ground
6 Data Set Ready
7 Request to Send
8 Clear to Send
9 Ring Indicator
Pin Signal
1 +5 VDC
2 - Data
3 + Data
4 GND
Pin Signal
1 power
2 gnd
3 tpb-
4 tpb+
5 tpa-
6 tpa+
Pin Signal
1 (Tip) Audio
2 (Ring) Power
3 (Shield) Ground
Pin Signal
1 (Tip) Audio_Left
2 (Ring) Audio_Right
3 (Shield) Ground
ENWW