If this is the feature that was removed around version 9, it's not really a big deal.
With console access to a node from the default login menu you could hold down shift and type LHN to bring up a support menu.
From this menu you could select that you required a support shell, a one time challenge is displayed on the screen and HP have a response generator.
No hidden account, no default system password, just a pretty secure manner to serve a customer need.
Biting the hand that feeds IT
