switel DE18X, Руководство по эксплуатации, Страница: 139 / 156

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Telephoning
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Key lock
The key lock prevents functions assigned to handset buttons being activated inadver-
tently.
3 sec
Activate the key lock function
Incoming calls can still be taken in the normal way even when the key lock
function is activated.
3 sec Deactivate the key lock function
Handset ringing melody
The ringing melody on the handset can be deactivated.
3 sec
Deactivate the ringing melody
3 sec Activate the ringing melody