Mitel probably didn't know that either.
When 3300 Version 4.? was the new thing, I used Mitel's Secure Telnet to get into the RTC Shell. Using the word "exit" caused the system to restart. Not realizing this, or what happened; I logged back in and started again. Typed the word "exit" again. Caused the system to restart again.
I didn't know that I was the cause of the restarts and opened a ticket with support. That wasn't documented and a fix for it was implemented in the very next stream a week or so later.