AASTRA DT4x3 for BusinessPhone User Guide EN - Manual (Page 28)

AMT/PUD/TR/0119/1/2/EN 2012-08-13
User Manual
Cordless Phones for BusinessPhone™
22
4.2 Turn the Audible Signal On/Off
Prerequisite: The handset is in idle mode:
Tip: While in a menu, press to return to idle mode.
A long press on , or , changes between ring signal on/off.
The icon indicates a silenced handset.
4.3 Lock/Unlock the Keypad
4.3.1 Lock/Unlock the Keypad in Idle Mode
To prevent accidentally pressing keys and making a call, the keys can be locked.
Lock Keypad
1 Press .
2 Press "Lock".
Unlock Keypad
1 Press .
2 Press "Yes".
Note: It is possible to answer/end a call while the keypad is locked. If the handset is
configured via the WinPDM it is also possible to call a pre-defined emergency number
while the keypad is locked. See handset’s Configuration Manual.
4.3.2 Lock/Unlock the Keypad during a Call
To prevent accidentally pressing keys, the keys can be locked during a call. This can be
useful when a headset is used and the handset is attached to a pocket or belt.
Lock keypad
1 Long press .
2 Press "Lock".
Unlock keypad
1 Press .
2 Press "Yes".
Tip: It is possible to use the volume buttons and the mute button during the call. If the
DT423/DT433 is used, it is also possible to use the alarm button.
4.4 Lock/Unlock the Handset
The handset can be protected for unauthorized use. If this function is activated, a PIN
code has to be entered for example to switch on the handset, to answer an incoming
call etc. The default phone lock code (0000) can be changed to any 4 - 8 digit
personalized code.
Note: If configured in the handset, it is possible to call a pre-defined emergency
number while the handset is locked. See the handset’s Configuration Manual. If the
DT423 or DT433 is used, it is also possible to use the Alarm button.