Enables or disables VMS Plus Mode. This lets you specify a
    transfer mode based on file type (for example, ASCII or image).

    With VMS Plus Mode disabled, FTP does not send the FTP command
    SITE. (Older implementations of the FTP server do not support
    this command.) The FTP client uses the SITE command to identify
    itself (its SITE type) to the remote host. The SITE type of an
    FTP client can be one of the following:

    o  +VMS+ - The client is in VMS Plus mode.

    o  NONE - The client is not in VMS Plus mode.

    Defaults:

    o  When you use FTP to connect to an OpenVMS host running TCP/IP
       Services, VMS Plus Mode is enabled.

    o  When you use FTP to connect to a non-OpenVMS host or to an
       Open VMS system running software that does not recognize VMS
       Plus Mode, VMS Plus Mode is disabled.

    DCL Format

      ENABLE VMS_PLUS

      DISABLE VMS_PLUS

    UNIX Format

      There is no UNIX equivalent for the ENABLE or DISABLE VMS_PLUS
      command.