TD 92476EN
05 October 2012 / Ver. PG1
User Manual
Aastra DT390 DECT Telephone
16
4 Basic Operation
4.1 Switch the Telephone On/Off
The telephone is switched off:
1 Press and hold .
When pressing the On-hook key , the telephone will vibrate and the display
lights up.
2 A dialog window DT390 Switch on? is displayed depending on which telephone
that is used. Confirm by pressing "Yes".
The telephone is in idle mode:
3 Press and hold the On-hook key .
4 A dialog window Switch off? is displayed. Confirm by pressing "Yes".
4.1.1 Turn the Audible Signal On/Off
A long press on in idle mode turns the ring signal on/off.
The icon indicates a silenced telephone.
4.2 Lock/Unlock the Keypad
4.2.1 Lock/Unlock Keypad in Idle Mode
Lock keys
To prevent accidentally pressing keys and making a call, the keys can be locked.
Press and then "Lock".
Unlock Keypad
Press and then "Yes".
It is possible to answer/end a call while keypad is locked. If the telephone is via the PDM/
CPDM3, it is also possible to call a pre-defined emergency call while the keypad is locked.
See Configuration Manual, Aastra DT390/DT69x DECT Telephones, TD 92503EN
4.2.2 Lock/Unlock Keypad during a Call
To prevent accidentally pressing the keys during a call, the keys can be locked. This can be
useful when a headset is used and the telephone is attached to a pocket or belt.
Lock keys
To prevent accidentally pressing keys and making a call, the keys can be locked.
Long press and then "Lock".
Unlock Keypad
Press and then "Yes".
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