public Employee getCallHandler(Call call)
    {
      for(int level = call.rank ; level <LEVEL-1 ; level++)
      {
          ArrayList<Employee> emplist = empLevels[level] ; // get it's level employeelist
          for (Employee e : emplist)
          {
              if(e.free)
                  return e ;
          }
      }
      return null ;
    }