Command: CREATE-STATION 2100 Parameter: PORT = 3-2-1 Parameter: TYPE = optiPoint 500 (The manual lists compatible terminal types).
Command: DISPLAY-STATE SUBSCRIBER 2000-2999 (The manual tells you which ranges are reserved). siemens hipath 3800 programming manual
The manual provides a crossover chart. You decide COS = 5 (Standard Internal/External). Reference the "COS Table" in Chapter 8. siemens hipath 3800 programming manual