This command gets the tower set for any node in the local name file which
 has only a simple address defined.

     GET TOWERS [file-name] [ALL]

 When you use CREATE to create an initial local name file, the addresses are
 placed in the file as simple Phase IV addresses.  Similarly, when you edit
 the local name file, you can specify the node addresses as simple Phase IV
 addresses or DECnet-Plus NETs (network entity titles).  The GET TOWERS
 command is used to obtain the full DECnet-Plus tower sets for these nodes
 by using the simple addresses.

 The GET TOWERS command scans the local name file for any node definitions
 that contain an empty TOWERS parameter or no TOWERS parameter.  For each
 such definition, it uses the ADDRESS parameter to attempt a connection to
 the specified node.  If the connection succeeds, it obtains the real tower
 set information from the node, and adds the appropriate TOWERS parameter to
 the node definition.  If the connection fails, it leaves the TOWERS parameter
 empty, allowing GET TOWERS to be retried at a later date.

 To update the tower set information for some subset of the nodes, edit
 the text file, delete the TOWERS parameter from the appropriate node
 definitions, and issue the GET TOWERS command.  The command obtains tower
 information for only those node definitions that do not already have a
 TOWERS parameter specified.

 To update the tower set information for all nodes in the local name file,
 issue the GET TOWERS ALL command.  The command obtains tower information for
 all nodes listed in the file.  If it cannot obtain tower information for any
 particular node, it will leave the old tower information for the node
 unchanged.

 Use of this command is optional.  You can specify the tower set for any
 node when you edit the local name file, or you can specify only the simple
 address.  If you specify only the simple address, network connection
 establishment might take longer for some nodes.

 If you do not specify a file name in the GET TOWERS command, a default
 file name of SYS$SYSTEM:DECNET_LOC_NODE_DEFINITIONS.TXT is used.