HP xw4600 Service And Technical Reference Manual page 170

Workstation
internal serial connector
162 Appendix A Appendix A—Connector pins
Pin Signal
1 DTR2#
2 RXD2
3 CTS2#
4 DSR2#
5 TXD2
6 +3.3V AUX
7 Ground
8 Ground
Pin Signal
9 +5V
10 +3.3V AUX
11 RTS2#
12 +3.3V
13 DCD2#
14 -12V
15 +12V
ENWW