Using a continuity tester I have derived the pinout of the supplied console cable: (partno: 5188-3836)
RJ45 - DB9(F) - PC serial signal
1 - 8 - CTS
2 - 6 - DSR
3 - 2 - RXD
4 - 1 - CD
5 - 5 - GND
6 - 3 - TXD
7 - 4 - DTR
8 - 7 - RTS
N/C - 9 - RI
It appears that this HP wiring is compatible with the system used by both cicso and sun for serial over RJ45. (Which is good!)
Shame this is not documented by HP (at least not anywhere I looked!).
#Console#ProCurve