SCACP> CALCULATE WINDOW_SIZE /SPEED=1000/DISTANCE=KILOMETERS=500

      The command in this example calculates the window size to be
      used between two nodes that are 500 kilometers apart, connected
      by a 1Gigabit/Second line speed. The command produces output
      similar to the following:

         Calculate Window Size  2-JUN-2006 17:49:18.41:
                Inter-node link DISTANCE:          500 KILOMETERS
                Inter-node link SPEED:            1000 Mb/s
                ------------------------        ------------------
                Recommended WINDOW SIZE:          1024 frames

      Note that the calculated window size is never smaller than the
      window size PEdriver automatically selects for the VC between
      two nodes, which is based solely on the reported local and
      remote line speeds. However, the calculated value is often
      larger because it includes packets stored in the inter-site
      link and the packet-size mix that the /OPTIMIZE qualifier
      enforces.