Nortel Modular ICS 6.0 Manual page 233

Tip -
you may have to enter a Class of Service password to gain
access to the system. See Using your Norstar system from an
external location on page 228.
Displays
Invalid Password
P0992640 03
If you use your Norstar system from outside the office,
(Blank display) Enter your password. It is not
shown on the display.
You have entered a password that is not
programmed into your system.
Using System features / 233
Modular ICS 6.0 System Coordinator Guide