Using a Virtual CD-ROM
Read thru the above referenced manual to familiarize yourself with IPMI and then navigate to the Virtual CD-ROM section of the menu.
Next, mount your windows share.
You should immediately see that the ISO is mounted as Device 1.
Reboot the system and access the BIOS. Go to Boot and ensure the Virtual CDROM is a choice.
You may need to select a slot and add it. Save and Exit.
On next boot hit F11 and ensure you see.
Select the Virtual CDROM from the next menu and proceed to reload the PBX from ISO.