Syntax: fax-mode

    The fax-mode command puts you into FAX mode - a mode which
    attempts to simplify the creation and modification of aliases
    whose expansion values are FAX addresses. In this mode, the DB
    command prompt changes to "db.fax>". To exit this mode use the
    command exit-mode. (From this mode there is no exit-program
    prompt; to immediately exit FAX mode, use the quit-program
    command.)

    When in FAX mode, aliases created with the add command are given
    the attributes mail-address and fax-address. Only addresses with
    both of these attributes can be manipulated with the add, copy,
    modify, rename, remove, set, and show commands while in FAX mode.
    Note, however, that if the "override on" command has been issued,
    then all attribute checking is bypassed and no attributes will be
    assigned to aliases created with the add command.

    In FAX mode, the add and modify commands have a different syntax
    then their counterparts in the normal DB mode. (Recall, you can
    always tell which mode you're in by the DB prompt: in normal mode
    the prompt is "db>"; in FAX mode the prompt is "db.fax>".)