HP 8100C - Manual (Page 44)

Managing the Fax numbers book 43
Managing the Fax numbers book
Registered users and the administrator can add, change, or delete
fax numbers stored in the Fax numbers book.
Because these are
public fax numbers, any other registered user can also see, change,
or delete any fax number.
Note The administrator can change entries in the public Fax numbers or lists
book from the Lists option in the Setup menu.
Adding fax numbers
Only registered users can add fax numbers to the public Fax numbers
book. Fax numbers registered users type while sending a fax are also
automatically added to the Fax numbers book, if the administrator
has enabled this option.