To Change The Pin; To Activate/Deactivate Key Tones; To Lock/Unlock The Keypad - Philips DECT1112S/05 User Manual

To change the PIN code
The PIN is a 4-digit password. It protects the handset & base
from misuse.The default PIN is 0000.
Press the Programming key
.
Press 1.
Enter the default 4-digit PIN code.
Press the Programming key.
Enter the new 4-digit PIN.
Press the Programming key.
Enter again the new 4-digit PIN.
Press the Programming key to save PIN code.
To activate/deactivate the key tones
Press the Programming key.
Press 7 to activate/deactivate the key tones.
Press the Programming key to save the setting
To activate/deactivate the keypad lock
Long press on # key to activate the keypad lock.
The display shows
Long press on # key to unlock the keypad.
Note:When the keypad is locked you cannot make calls but you
can still answer a call.
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http://www.philips.com/faqs/dect
.