Syntax: modify alias-name [[item value]...]

    With the modify command, various items associated with a FAX
    address can be altered or removed, and new items can be added
    to the FAX address. To alter or add an item simply specify the
    item name and new value. To delete an item, simply give the item
    name without any associated value. The domain-name and fax-number
    items, described below, cannot be deleted.

    In addition to the items which can be specified with the add
    command, two additional items can be specified. These items are:

 fax-number

    The FAX number to send the FAX message to.

 domain-name

    The domain name associated with the FAX address.

    Continuing with the example of the previous subsection, we can
    use the modify command to delete the use of the 1-address line
    and to change the recipient's telephone phone number:

    db.fax> modify john-fax 1-address
    [1 entry modified]
    db.fax> modify john-fax telephone-number "(714) 555-1212"
    [1 entry modified]
    db.fax> show john-fax
    Alias name: john-fax
    Recipient's FAX number:       (714) 555-1212
    Recipient's name:             John Doe
    Recipient's telephone number: (714) 555-1212
    Domain specification:         @text-fax.example.com
    [1 entry shown]
    db.fax>