There is no official 'generic' way to do it. The password is different for each system and for each vendor that supports it. The only way you're likely to get it is by attending the 3 week class and signing a non-disclosure agreement - and even that's not guaranteed. The best way I know of to get it is to have your tech trust you and respect your abilities - then you might get it, or know the secret to how it is derived. And then keep your mouth shut and don't share it with co-workers and give them the ability to make your life miserable.
That being said, if you are not using call detail recording you can do limited amounts of maintenance via the system's RMX port. You need to have the kvi910.kbd file loaded in your procomm directory, and then you connect to the RMX port with 4800 7 E 1 for your communication settings, and using TVI910 for your terminal type. On both the Model 30 and 80 the RMX port is the TOP DB25 connector on the DM3L or DM4L (or higher) processor board. After connecting you will see a row of ## signs. Hit CTRL-X to logon and get a > commad prompt. When you get done, hit CTRL-T to logout. (That may be reversed - I can never remember till I do it). If you are not familiar with the process, you need to separate your action word from your target database with a dash. For example, DIS-SCSU to display station information (caps is not required).
Things you need to know: Backspace does not work. If you make a mistake it's best to just hit CTRL-T (or X) to get out, and then log right back in until you know what you're doing. Entering a question mark? for a parameter will give you a list of what you can enter. YOU CAN TRASH YOUR SYSTEM THRU THE RMX PORT - do not experiment with commands you don't know, guess at how they are spelled, etc, because there are no safeties on the RMX port to prevent you from typing in the "erase my whole system" command. If you are getting into risky territory you will be asked for a password. That password is hicom, but, as the person told me when he gave it to me... "don't come crying to me if you wipe out your system." I was also told that if it asked you for the password you were doing something you should not be - but I have since found out that you need it for something as simple as changing a name, so you do have to use it on occasion. Just heed the warnings!
There you go... How to wreck your system - all in a day's work... Don't expect any menus, any help, or any shortcuts. If you are unsure of yourself then quit while you are ahead. It is BY FAR safer to suck up to your tech to get the password and go in through the handy (and protected) EMML or Direct AMO interfaces.