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            |  | Core functionality |  |  
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  The picture below is an overview about the core parts of SMS Server Tools.
  
  SMSD is the main program which starts a sub process for each modem and controls those processes.
  
  This example uses 5 modems and it uses the sorting-by-provider function to save money.
  It's explained on the next pages.
   
  
 
 
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