This specifies the base directory or name entry to use when exporting
 the reverse address mapping links to the node name (also called the
 back translation links).

     REVERSE_DIRECTORY rev-dir-name

 The links under this directory are used to map NSAP values to their
 respective node names.  These directories are used only for the DECdns
 directory service.

 If not specified, the default reverse directory is used.  This default
 can be displayed or changed using the SHOW or SET DEFAULT commands.

 See the NAMES_AND_DIRECTORIES topic for more information on directories.