Comelit MT 40705 - Manual (Page 28)

Chapter 6 — Operation
6.1 Keyboard Lock/Unlock (Hidden command)
When the user leaves the control desk, he may wish to lock the keyboard controller to prevent unauthorized
use.
Pressing
+ will lock the keyboard controller. Pressing + while the keyboard is
locked will open the password screen. If the correct password is entered, the keyboard controller will return
to normal operation.
If the power is turned OFF and ON while the keyboard is locked, it will ask for the password. Entering the
correct password will cause the keyboard controller to return to normal operation.
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ENTER 7 7 7 ENTER 7 7 7