switel DF 1851 Mode D'emploi page 110

Phonebook
Editing telephone book entries
Menu . . .
/
Show Entry
New Entry
Delete All
Memory Info
18
Press Menu, select PHONEBOOK and press OK.
Select one of the following options and confirm with OK:
All entries are shown. Scroll to the desired entry. Press Menu
to edit or delete the entry.
You can create a new entry.
The complete phonebook will be deleted after a confirmation
query.
The current allocation will be displayed (e.g. 007/050 : 7 of
50 possible entries are present).