 TYPE
    cmt$radial_if_port_number = (cmc$iou_radial_if_port_0,
      cmc$optional_radial_if_port_1, cmc$optional_radial_if_port_2,
      cmc$optional_radial_if_port_3, cmc$optional_radial_if_port_4,
      cmc$optional_radial_if_port_5, cmc$optional_radial_if_port_6);
