switel DF 87 Série Mode D'emploi page 156

Setting the telephone
Setting the Flash Time
Menu
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Editing the PIN
Menu
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☞
The four digit PIN protects some settings against unauthorized changes.
If you have forgotten your PIN please call our service hotline.
Turning the first ring on/off
Menu
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☞
When this option is set to Off the first ring for a normal call will not be
sounded.
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Press the Menu softkey.
Select Base Settings and press Select.
Select Flash Time and press Select.
Select Short (100 ms), Medium (300 ms) or Long (600 ms)
and confirm with Ok.
Press the Menu softkey.
Select Base Settings and press Select.
Select Modify PIN and press Select.
Enter the relevant PIN (default 0 0 0 0) and press Ok.
Enter a new PIN and press Ok.
Enter the new PIN again and press Ok.
Press the Menu softkey.
Select Base Settings and press Select.
Select First Ring and press Select.
Select On or Off and confirm with Select.