HP ProLiant xw460c Blade Workstation - Manual (Page 10)

10 HP BIOS Serial Console User Guide
IMPORTANT: Settings take effect on the next RBSU-prompted reboot,
but you must disconnect and then reconnect for new settings to take
effect on both local and remote machines.
Virtual Serial Port
When enabled, Virtual Serial Port provides remote access through the iLO
management controller to BIOS Serial Console.