HP xw4550 Service And Technical Reference Manual page 148

Workstation USB connector
Workstation IEEE 1394 connector
Microphone cable connector (1/8 inch)
Headphone cable connector (1/8 inch)
Line-in audio cable connector (1/8 inch)
140 Appendix A Appendix A—Workstation connector pins
Pin Signal
1 +5 VDC
2 - Data
3 + Data
4 Ground
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
Pin Signal
1 (Tip) Audio_In_Left
2 (Ring) Audio_In_Right
3 (Shield) Ground
ENWW