IPMI (Called AMT and sometimes vPro by Intel),
IPMI is not AMT. AMT/vPro is closed protocol, right? Also people are disabling AMT, because of listed risks, which is too bad; but it's easier than properly firewalling it.
Better to just say "it lets you bring up the console remotely without windows running, so machines can be fixed by people who don't have to come into the office".