Avaya 3749 User Manual page 112

press.
For more information about Soft keys, Hot keys and
Multifunction button, see User Guide, Avaya 374x DECT
Telephones.
Turn the automatic keypad lock on/off
Enter Settings , and step to Locks. Select Automatic
key lock Off/On, select On/Off, and press Back. A locked
keypad is indicated by the Key lock icon .
To unlock,press the key , and then the Soft key Yes.
Avaya 374x DECT Telephone - Quick Reference Guide