Alcatel Temporis IP 600 Administrator's Manual page 26

Press Menu key, enter password and then press OK key, the phone is unlocked.
The icon will disappear from the idle screen.
Note: if Temporis IP600 is locked under Lock&Answer mode, you have to enter
Menu->3.Settings->2.Advanced ->3.Phone Setting -> 3.Lock to disable this
option.
To enable keypad lock via Web interface:
Choose Phone->Preference-> Keyboard Lock. Please refer to the instruction above for
the different options.
To configure a programmable key as shortcut for keypad lock via Web interface
You can use any of the programmable keys to provide a shortcut to Keypad Lock.
Choose Phone->Function Keys->select a programmable key and in the scrolling menu
select Keypad lock.
In idle mode, when pressing this key, you're prompted to enter the password and then
Temporis IP 600 Administrator guide version 0.1 - 20 -