*COMDECK X25CON03 
  
_ 
* * * PACKET SWITCHING NETWORKS TYPES                                  *
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      X9DATAPAC  = 1; 
      X9TELENET  = 2; 
      X9TRANSPAC = 3; 
      X9TYMNET   = 4; 
      X9CDSN     = 5; 
      X9UNINET   = 6; 
      X9C120     = 7; 
      X9S253     = 253; 
      X9S254     = 254; 
      X9S255     = 255; 
  
      X9LPSN     = X9C120;                  _LAST COMMERCIAL PSN       ?
      X9FSITE    = X9S253;                  _FIRST SITE-DEFINED PSN    ?
      X9OFFSET   = 245;  _ = X9FSITE - X9LPSN - 1.....LEAP OF NUMBERS  ?
      X9PSNLAST  = 10;   _ = X9LPSN + 256 - X9FSITE...NUMBER OF ENTRIES?
_ 
* * * NOTE -- IF YOU ADD/DELETE COMMERCIAL PSN-S OR SITE-DEFINED
* * *         PSN-S TO THE ABOVE LIST, YOU MUST SET X9LPSN, X9FSITE,
* * *         X9OFFSET AND X9PSNLAST CORRECTLY.  ALSO, CHANGES MUST BE
* * *         MADE IN X25NETDEF AT NETWORK..MAC TO REFLECT THE CHANGE.
* * *         ALSO, THERE IS A TABLE FOR CHECKING VALID RANGE IN X25AT
* * *         AS AN ENTRY OF X25LCB: ACTBL..BZTRANSTYPE,D2VM. THE VAULE 
* * *         MUST BE CORRECTLY SET.
* * * 
* * *         X9LPSN    = THE HIGHEST CDC-DEFINED PSN NUMBER
* * *         X9FSITE   = THE LOWEST USER-DEFINED PSN NUMBER
* * *         X9OFFSET  = X9FSITE - X9LPSN - 1 = UNDEFINED PSN NUMBERS
* * *         X9PSNLAST = X9LPSN + 256 - X9FSITE = DEFINED PSN NUMBERS
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