Assuming that the Phase IV address prefix value is "49::", some examples
 of address towers are:

   Abbreviation                      Fully Specified
   ------------                      ---------------
   1.5                               NSP/49::01:AA0004000504:20
   1.5                               NSP/49::01:AA0004000504:20
   39:840:01:AA0004000504:20         NSP/39:840:01:AA0004000504:20
   39:840:01:AA0004000504:21         TP4=DEC0/39:840:01:AA0004000504:21
   TP4/39:840:01:AA0004000504:21     TP4=DEC0/39:840:01:AA0004000504:21

 Examples of address towers using normal default values for both a DECnet
 Phase IV node and a DECnet-Plus node might be:

   TOWERS={1.5}
   TOWERS={2.54, 39:840:01:AA0004000504:20, 39:840:01:AA0004000504:21}