switel DF 1851 Mode D'emploi page 112

Setting the telephone
Menu BASE
Menu . . .
☞
If you set a handset PIN (any four digit number) you'll always need to
key it in before you can use the handset menu.
Time Set
Dial Mode
Flash Time
Deregistration
PIN Base
Set Default
20
Press Menu, select BASE and press OK.
Enter the date (e. g. für den 2. July 2011 -> 020711)
and the time (e. g. für 8:15 o'clock -> 0815) using the
digit keys and press OK.
☞
In case of a power failure the settings will be lost if
the handset will be switched off or the battery is
empty.
Select Tone or Pulse. In most situations the Tone opti-
on should be selected.
Select the flash time.
Enter the base PIN (in delivery state "0 0 0 0"), slect
one of the handsets and press OK. When a handset is
deregisterd you cannot use it for calling any more until
it is regístered on a base again.
You need the base PIN e. g. for registering/deregiste-
ring handsets.
In delivery state the base PIN is "0 0 0 0".
After a confirmation query the base will be reset to deli-
very state.
☞
The registration of handsets will not be changed.